Why photorespiration does not take place in C4 plants?
1. Do not contain RuBisCo.
2. Have a mechanism that increases the concentration of CO2 at the enzyme site.
3. Cells do not allow oxygen to accumulate in them.
4. Cells are impermeable to oxygen.
Read the following statements carefully
A. Lipid component of the plasma membrane mainly consists of phosphoglycerides.
B. Polar molecules can pass through the lipid bilayer of plasma membrane, therefore they do not require carrier proteins to facilitate their transport.
C. Secondary wall is capable of growth and it is formed on the outer side of the cell
D. Quasi fluid nature of lipid enables lateral movement of proteins within the overall lipid bilayer of plasma membrane
E. Middle lamella glues the different neighbouring cells together
How many statements are incorrect?
1. Three
2. Five
3. Four
4. Two
Which of the following is mis-matched pair?
1. Belladonna - Medicine - Solanaceae
2. Asparagus- Vegetable - Liliaceae
3. Trifolium- Ornamental plant - Fabaceae
4. Tobacco - Fumigatory - Potato family
Which of the following are the functions of deoxyribonucleoside triphosphates?
i. Act as substrates
ii. Provide energy for polymerization reaction
iii. Act as enzyme
iv. To separate strands of DNA
1. i, ii, iii
2. ii, iv
3. i, ii
4. i, iii
Death of organism is the beginning of food chain in which
1. Energy and nutrient requirement is met by degrading organic matter
2. Major conduit for energy flow is operational in aquatic ecosystem
3. Number of trophic levels are limited
4. Producers belong to first level
RQ of tripalmitin is
1.
2.
3.
4.
The non-cellular organisms that are characterized by having inert crystalline structure outside the living cell
1.Was discovered by J. Pasteur.
2.Are obligate intercellular parasites.
3.Have genetic material as either RNA or DNA.
4.Are cellular organisms.
Which of the following complex of mitochondrial ETS has two copper centers?
1. Cytochrome b c1 complex
2. NADH dehydrogenase complex
3. Succinate dehydrogenase complex
4. Cytochrome oxidase complex
External and internal structure, along with the structure of cell, development processes and ecological information of organisms are essential and forms the basis of
1. Classical systematic
2. Modern taxonomy
3. Old systematic
4. More than one option is correct
The placentation having only single ovule is
1. Marginal
2. Axile
3. Basal
4. Parietal
During the past century, the temperature of Earth has increased by _____, most of its during the last three decades
1. 6°C
2. 0.6°C
3. 0.8°C
4. 7°C
In photosynthesis, fixation of 1 CO2 in maize (A) and wheat (B) plant requires
1. (A) 3 ATP and 2 NADPH + H+
(B) 3 ATP and 2 NADPH + H+
2. (A) 5 ATP and 2 NADPH + H+
(B) 3 ATP and 2 NADPH + H+
3. (A) 2 ATP and 2 NADPH + H+
(B) 3 ATP and 2 NADPH + H+
4. (A) 30 ATP and 12 NADPH + H+
(B) 18 ATP and 12 NADPH + H+
The phytohormone which promotes rapid internode elongation in deep water rice plant is
1. | Gibberellins | 2. | Ethylene |
3. | Auxin | 4. | Cytokinin |
A person with Down syndrome will show all the given symptoms except
1. Many loops on finger tips.
2. Flat back of head
3. Big and wrinkled tongue
4. Narrow round face
The structural and catalytic role during translation is brought about by
1. mRNA
2. tRNA
3. rRNA
4. Both 1 and 3
Match the crop with their variety.
A. Cauliflower i. Pusa Shubhra
B. Brassica ii. Pusa Gaurav
C. Okra iii. Pusa Sawani
D. Cowpea iv. Pusa Komal
1. A-iv, B-iii,C-ii, D-i
2. A-ii, B-i,C-iv, D-iii
3. A-i, B-iii,C-ii, D-iv
4. A-i, B-ii,C-iii, D-iv
The saprophytic protists whose body moves along decaying twigs and leaves engulfing organic material
1. Form aggregation called plasmodium under unsuitable condition.
2. Possess spores with true wall.
3. Uses water current for spore dispersal.
4. Forms non resistant spores.
Monascus purpureus is a
i. Bacteria
ii. Yeast
iii. Produces cyclosporin A
iv. Produces statins
1. i,iii
2. ii,iii
3. i,iv
4. ii,iv
Mark the correct pair with respect to chromosome number in gamete (n)
Name of organism: Chromosome number in gamete
1. Apple — 34
2. Rice — 24
3. Potato —12
4. Onion — 10
The cell in the pollen grain which is responsible for giving rise to male gamete is
1. Rod shaped with dense cytoplasm
2. Of smaller size and float in the cytoplasm
3. Capable of dividing meiotically and give rise two male gamete
4. It has abundant food reserve and large irregularly shaped nucleus.
During the formation of embryo sac
1. The mitotic divisions are strictly cellular.
2. Three cells present at the micropylar end are called antipodals.
3. Six of the 8 nuclei are surrounded by cell wall.
4. There is development of special thickening called filiform apparatus at chalazal end.
Decomposition is controlled by several factors. Find out the incorrect option with respect to it.
1. Slower if detritus is rich in lignin and chitin.
2. Quicker if detritus is rich in nitrogen.
3. Cool and moist environment favour decomposition
4. Low temperature and anaerobiosis inhibit decomposition.
The meristem that occurs in mature regions of roots and shoots of dicots and appears later than primary meristem is formed at the result of _____ from _____ tissue
1. Differentiation, primary meristem
2. Maturation, promeristematic
3. Dedifferentiation, primary permanent
4. Redifferentiation, secondary meristem
A stable community
1. Should not show too much variation in productivity from year to year.
2. It must be either resistant or resilient to occasional disturbances (natural or man-made).
3. It must also be resistant to invasions by alien species.
4. All of these
According to five kingdom system of classification proposed by R.H. Whittaker multicellular organism having nuclear membrane and heterotrophic mode of nutrition will be placed exclusively in
1. 3 kingdoms
2. 4 kingdoms
3. 2 kingdoms
4. Either 1 or 2
Which of the following is wrong for the representation of the flower in the floral diagram?
1. | Fusion is indicated by enclosing the figure within bracket and adhesion by aline drawn above the symbols of the floral parts. |
2. | A floral diagram provides information about the number of parts of a flower, their arrangement and the relation they have with one another. |
3. | The position of the mother axis with respect to the flower is represented by a dot on the bottom of the floral diagram. |
4. | Calyx, corolla, androecium and gynoecium are drawn in successive whorls, calyx being the outermost and the gynoecium being in the centre. |
Trichoderma species are free-living fungi that are very common in the
1. Root ecosystem
2. Stem ecosystem
3. Leaf ecosystem
4. Both 2 and 3
The following are the criteria for essentiality of an element except
1. In the absence of the element the plants do not complete their life cycle or set the seeds.
2. The requirement of the element must be specific and not replaceable by another element.
3. The element must be directly involved in the metabolism of the plant.
4. The element must not necessary for supporting normal growth.
The plant in the below diagram is characterised by having
1. Independent free living existence of male and female gametophyte.
2. Thick cuticle and sunken stomata to reduce water loss.
3. Only one kind of spores i.e. homosporous.
4. The microspore develops into a into a male gametophyte which is highly elaborated
The Government of India in 1980s has introduced the concept JFM to:-
1. Work closely with the local communities for protecting and managing forests.
2. To control the emission of ozone-depleting substances.
3. To take appropriate measures for conservation of biodiversity and sustainable utilization of its benefits.
4. To convert forest to agricultural land so as to feed the growing human population.
How many different RNA molecule would be necessary to translate following
mRNA 5'– AUGCUUGUCUACAGAUAA – 3' ?
1. 6
2. 3
3. 4
4. 5
i. Artificial system of classification gave equal weightage to vegetative and sexual characteristics.
ii. Natural system of classification considers only the external features.
iii. Organism belonging to the same taxa do not necessarily have a common ancestors.
Options:
1. i and ii are incorrect
2. ii and iii are correct
3. Only 'iii' is correct
4. Only 'i' is correct
Crossing over occurs just prior to
1. Pachytene
2. Diplotene
3. Diakinesis
4. Zygotene
In the figure below identify the remain of second cotyledon
1. Scutellum
2. Coleoptile
3. Epiblast
4. Coleorhiza
Chlorosis is the loss of chlorophyll leading to yellowing of leaves. This symptom is not caused by the deficiency of which of the following elements?
1. N
2. K
3. Mg
4. Ca
The derivatives of the secondary meristem in the stellar region are
1. Alburnum and Duramen
2. Primary xylem and Secondary phloem
3. Phellem and Phelloderm
4. Primary phloem and Alburnum
A cross was made between two Antirrrhinium species with a genotype Rr. Of the total 500 progenies obtained individual with parental phenotype would be
1. 250
2. 125
3. 370
4. 400
Find the odd one out with respect to functional component of ecosystem
1. Productivity
2. Stratification
3. Decomposition
4. Nutrient cycling
Select incorrect statement for the lac operon
1. Here Lac refers to lactose
2. The i-gene is non-constitutive gene, synthesizing repressor protein
3. The y-gene codes for permease
4. The repressor protein binds to the operator region and prevents RNA polymerase activity
Which of the following statement is wrong?
1. Flies and beetles visit white flowers with sweet fragrance
2. Floral rewards are usually pollen and nectar
3. Pollen grains are protected from wetting by mucilage covering in certain groups
4. Anemophilous flowers have generally single ovule in ovary
Which is not a characteristic of imbibition ?
1. There is generation of heat.
2. It is a irreversible phenomena.
3. It involves both adsorption and capillarity.
4. It is also diffusion of water.
In nature, a given habitat has enough resources to support a maximum possible number, beyond which no further growth is possible. The limit is known as
1. Environmental resistance
2. Intrinsic rate of natural increase
3. Carrying capacity
4. Exponentially growth
The organelles formed by the process of packaging in the golgi apparatus is
1. Double membrane organelle.
2. Possess single circular DNA molecule
3. Rich in hydrolases
4. Able to occupy up to 90 percent volume of the cell
In how many organisms present below in the box in which reproduction is synonymous with growth?
Amoeba, Yeast, Diatom, Mules, Spirogyra, Mangifera, Panthera, Datura and Gonyaulax
1. 7
2. 5
3. 4
4. 6
Read the following statement and select the right choice
a. Semi-dwarf varieties, Jaya and Ratna were developed in IRRI, Phillippines
b. Classical plant breeding involves crossing or hybridization of pure lines
c. Saccharum barberi was originally grown in South India
d. Genetic variability is the root of any breeding programme
1. Only a is correct
2. b and d are correct
3. a, b and c are correct
4. b, c and d are correct
The blood from a person with an AB blood type
1. Would agglutinate with anti-A antibodies only.
2. Would agglutinate with anti-B antibodies only.
3. Would agglutinate with both anti-A and anti-B
antibodies.
4. Would not agglutinate with either anti-A of anti-B
antibodies.
Which of the following is very close to the time of
ovulation?
1. Peak of progesterone.
2. Minimum level of estrogen.
3. Peak of LH and FSH.
4. Thickest layer of endometrium.
All the following statements are correct about ectopic
pregnancy, but one is wrong. Which one is wrong ?
1. The blastocyst occasionly embeds and develops
within the fallopian tube.
2. It is extremely painful and potentially fatal to the
mother because heavy bleeding occurs as the
embryo grows.
3. It can be detected by using ultrasound.
4. It is the process in which the embryo blastocyst
burrows and embeds itself in the lining of uterus.
Breathing rate will automatically increase when
1. Blood pH is high.
2. Blood acidity decreases.
3. The amount of carbon dioxide in the.
blood increases.
4. Hemoglobin is unloaded.
How is the digestion and absorption of fats different from that of proteins and carbohydrates?
1. Fat digestion occurs in the small intestine, and
the digestion of proteins and carbohydrates occurs
in stomach.
2. Fats are absorbed into the cells as fatty acids and
monoglycerides but are then modified for
absorption into the blood through lacteals; amino
acids and glucose are not modified further.
3. Fats enter hepatic portal circulation, but proteins
and carbohydrates enter the lymphatic system.
4. Fats are absorbed in the large intestine and protein
and carbohydrates are absorbed in the small intestine.
Which of the following enzymes has the lowest
pH optimum?
1. Salivary amylase.
2. Pancreatic amylase.
3. Pepsin.
4. Trypsin.
Arrange the following component in the sequence of activation of blood clotting mechanism?
(i) | Platelets | (ii) | Prothrombin |
(iii) | Fibrinogen | (iv) | Ca++ |
(v) | Thrombokinase |
1. (i), (ii), (iii), (iv), (v)
2. (i), (iv), (v), (ii), (iii)
3. (iii), (iv), (v), (i), (ii)
4. (v), (iv), (iii), (ii), (i)
Vertebrates and seastars may seen as different as two
animal groups can be, yet they share
1. The same type of body symmetry as adults.
2. A high degree of cephalization.
3. Certain developmental pattern, including the type
of coelom formation.
4. The presence of endoskeleton that include
cranium
In the accompanying diagram of a human nephron the functional parts are labelled as A, B, C, D, E.
Study the diagram to answer the questions given
P: | Active secretion of H+ and K+ into the filtrate occurs in which parts? |
Q: | Conditional reabsorption of Na+ and water is a function of |
R: | Reabsorption of water is minimum in which segment? |
Choose the correct option:
P | Q | R | |
1. | B,D | C | E |
2. | A,B,C | C | E |
3. | D,E | D | C |
4. | A,D,E | E | C |
Unlike placental Mammals, both Monotremes
(Parofotherian) and Marsupials
1. Have some embryonic development outside the
Mother uterus.
2. Lack Mammary gland.
3. Lack body hairs.
4. Lay eggs
Intercalated disc are a type of
1. Adherent junction.
2. Desmosomes.
3. Communicating junction.
4. Tight junction
Oxygen haemoglobin dissociation curves are represented as A and B. Select the incorrect interpretation
1. | Curve B has increased ability to unload O2 in tissues, with respect to curve A. |
2. | The shift in a curve from B to A is associated with decreased P50 value. |
3. | At elevated temperature the curve will shift from B to A. |
4. | Shift in a curve from A to B is associated with decreased O2 carrying capacity of haemoglobin. |
Select the correct matching of hormone its source of
synthesis and function.
Hormone |
Source |
Function |
|
1. |
Glucagon |
b-cells of pancreas |
Increase blood glucose levels |
2. |
Vasopressin |
Hypothalamus |
Increase diuresis |
3. |
ACTH |
Anterior lobe of pituitary |
Stimulates synthesis and secretion of glucocorticoids |
4. |
LH |
Hypothalamus |
Stimulates gonadal activity |
Which of the following is the incorrect matching of type
of joint, its characteristic features and an example?
|
Joint |
Example |
1. |
Cartilaginous joints : Permits limited movement. Bones are joined together with help of cartilages |
Joint between the adjacent vertebrae in the vertebral column |
2. |
Hinge joint : Characterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bone. Allow considerable movement |
Knee Joint |
3. |
Pivot : Allow considerable movement |
Between atlas and axis |
4. |
Gliding joint : Permits limited movement. Lack synovial Huid. |
Between the carpals |
If we cut the vagus nerve supplying the heart of frog.
the heart rate will
1. Increase.
2. Decrease.
3. No effect on heart rate.
4. First decrease then normalised.
Which of the following is the incorrect difference between rods and cones?
Rods |
Cones |
|
1. |
Contain rhodopsin visual purple pigment |
Contain iodopsin visual violet pigment |
2. |
Enable us to see black and white |
Respond to red, green, and blue lights |
3. |
Concentrated in the centre of the retina |
Evenly distributed all over retina |
4. |
Twilight vision |
Daylight/Photopic vision |
If a person is lost in a desert but has a can of beer,
should he drink beer to quench his thirts ?
1. No, alcohol inhibits ADH secretion and thereby
increases urine output.
2. Yes, alcohol stimulates the release of ADH.
3. No, alcohol inhibits absorption of Na+
4. Yes, alcohol stimulates excessive absorption of
Na+
Use the graph below, which shows changes during
the menstrual cycle.
What is the cause of the sudden increase shown as
point E ?
1. Negative feedback of progesterone on the
hypothalamus.
2. Negative feedback of estrogen on the anterior
pituitary.
3. Positive feedback of FSH on ovary.
4. Positive feedback of estrogen on the anterior
pituitary
In the first trimester of pregnancy which of the following
hormones will stimulate corpus luteum for the
production of estrogen and progesterone
1. LH.
2. HCG (Human chorionic gonadotropin).
3. Human placemental lactogen.
4. FSH
By th end of the first trimester which of the following
has occurred in the foetus ?
1. The first movements of the foetus and the
appearance of hair on the head.
2. The foetus has lungs to breathe.
3. Alll the organs of foetus have begun to form, the
limbs and external genitalia are well developed.
4. Embryo’s hearty is formed and the body is covered
with fine hair.
The plasma calcium levels is very effectively
maintained by a balance between the activities of
1. Thyroxine and parathormone.
2. Parathormone and calcitonin.
3. Aldosterone and vasopressin.
4. Insulin and glucagon.
If due to some injury the chordae tendinae of mitral
valve of the heart is partially non functional or cut. What
would be the immediate effect ?
1. The flow of blood into the pulmonary artery will be
reduced.
2. The flow of blood into the aorta will be reduced.
3. The pacemaker will stop functioning.
4. The blood will flow back into right atrium.
If a person is infected with some deadly microbes to
which immune response is required immediately as in
tetanus, what should be done ?
1. Immediately tetanus toxoid vaccine should be
given.
2. We need to directly inject antitoxin, as ATS serum.
3. Antibiotic injection should be given to destroy
tatanus toxin.
4. Steroids should be given to immediately reduce
the symptoms.
Antigen binding site of antibody molecule is made up of
1. Variable region of light chain.
2. Variable region of heavy chain.
3. Variable regions of both light and heavy chains,
present at N-terminal end.
4. Constant regions of light and heavy chair present
at C-terminal end
Each of the following statements concerning malaria
is correct, except
1. The female Anopheles mosquito is a vector.
2. Infective stage, sporozoites reach the liver through
blood.
3. Parasites reproduce asexually in the red blood
cells, bursting the RBCs and causing cycles of
fever and chills.
4. Sexual stages, gametocytes develop in the human
gastrointestinal tract.
Which of the following is correct about probe?
A. It is ssDNA or ssRNA.
B. Used to detect gene of interest from gene library.
C. Used to detect mutations in genes in suspected
cancer patients.
D. Used to detect HIV in suspected AIDS patients.
1. A only
2. A and B
3. A, B and C
4. A,B,C and D
Which of the following is correct matching of the step labelled D on the figure ?
1. Na+ channels are closed and some K+ leak out to
maintain a resting potential.
2. K+channels open and K+ flows out of the cell causing rapid repolarisation.
3. K+ continues to flow out producing hyperpolarisation of the membrane.
4. Na+ ion channels close and K+ channels begin to open.
Lactational amenorhoea is due to
1. High levels of gonadotropins in the blood.
2. High level of prolactin.
3. High level of estrogen and progesterone in the blood.
4. Low levels of prolactin in blood.
Which of the following is not a direct method of gene transfer?
1. Microinjection
2. Biolistic
3. Electroporation
4. Disarmed pathogen vector
Saheli is
1. Combined pill, has to be taken daily for a period of
21 days starting preferably within the first five days
of the menstrual cycle.
2. The new oral contraceptive of females, contains a
non-steroidal preparation, ‘centchroman’. It is once
a week pill.
3. Only progesterone pill.
4. An abortion pill.
The process of evolution of different species in a given
geographical area starting from a point and literally
radiating to other areas of geography is called
1. Divergent evolution.
2. Adaptive radiation.
3. Adaptive convergence.
4. Parallel evolution.
Which of the following is not present in ATP?
(1) Pentose sugar
(2) Deoxyribose sugar
(3) Purine base
(4) Phospho-ester linkage
(5) Phospho-diester linkage
(6) Hydrogen bond
1. (2),(4), (5),(6)
2. (1), (6), (2), (5)
3. (2), (5), (6)
4. (2), (6) only
Which of the following would be most useful for
constructing a cladogram showing the taxonomic
relationship among several fish species?
1. Several analogous characteristic shared by all the
fishes.
2. Single homologous characteristic shared by all the
fishes.
3. The total degree of Morphological similarity among
various fish species.
4. Several characteristic thought to have evolved after
different fish diverged from one another
RNA Interference / antisense RNA technology takes
place
1. In all prokaryotic organisms as a method of cellular
defense.
2. During tissue culture.
3. In all eukaryotic organisms as a method of cellular
defense.
4. In all moconot plant as a method of insect pest
resistance.
The transduction of sound waves to action potentials takes place:
1. Within the tectorial membrane as it is stimulated by the hair cells.
2. When hair cells are bent against the tectorial membrane causing them to depolarize and release neurotransmitter molecule that stimulates sensory neurons.
3. As the basilar membrane becomes more permeable to sodium ions and depolarizes, initiating an action potential in sensory neurons.
4. Within the middle ear as the vibration is amplified by the malleus, incus, and stapes.
Which type of cartilage is present in the tip of nose
and adjacent bones of vertebral column ?
1. Hyaline certilage : White fibrous cartilage
2. Hyaline cartilage : Calcified cartilage
3. Elastic cartilage : White fibrous cartilage
4. Calcified cartilage : White fibrous cartilage
Vaccines are available for
1. All bacterial disease.
2. All viral disease.
3. For selective bacterial and viral disease.
4. All pathogenic disease.
One different between a cancer cell and a normal cell
is that
1. The cancer cell is unable to synthesize DNA.
2. The cancer cells have decreased action of
telomerase activity.
3. Cancer cells continue to divide even when they
are tightly packed.
4. The cell cycle of cancer cell is arrested at the
S phase
All the following are present in sponges, except
1. Spicules
2. Choanocytes
3. A digestive tract
4. Sexual and / or asexual reproduction
Tick mark of the false statement with respect to Periplaneta, Americana.
1. | Mandible help in incising and grinding. |
2. | Malpighian tubules are present at the junction of midgut and ileum. |
3. | Hepatic caeca are present at the junction of crop and gizzard. |
4. | Mushroom gland is present in 6-7th abdominal segments and functions as an accessory reproductive gland in males. |
Which of the following statements about Bacillus thuringiensis are correct?
A. | One of the toxins produced by the bacteria is thurioside, which is active against different groups of insect larvae. |
B. | The toxin accumulates in the bacteria during the sporulation stage. |
C. | Upon ingestion by susceptible insects they are converted into active form and kill them by inhibition of ion transport in the midgut. |
D. | The proteins encoded by the gene cry II Ab control corn borer, a lepidopteran. |
1. A and B
2. B and C
3. A, B and C
4. A, B, C and D
False statement is
1. Inhibition of succinic dehydrogenase by malonate
can be reversed by increasing the concentration
of succinate.
2. Non-competitive inhibition occurs when the
inhibitor and substrate bind at different sites on
the enzyme.
3. Non-competitive inhibitors do not interfere with the
binding of substrate to enzyme. It can be overcome
by increasing the concentration of substrate.
4. A competitive inhibitor of an enzyme increases Km
without affecting Vmax
In terms of algebraic symbols used in the Hardy
Weinberg equation (p and q) the most likely effect of
assortative mating (highly selective mating) on the
frequencies of allele and genotype for a gene locus
would be
1. A decrease in p2 compare to q2
2. A trend toward zero for q2
3. Convergence of p2 and q2 towards equal values.
4. A decrease in 2pq below the value expected by
Hardy-weinberg theoram.
Alteration of cardiovascular activity is related with the
use of
1. Morphine.
2. Cannabinoids.
3. Heroine.
4. Barbuitrates
Breeding of unrelated animals, which may be between
the individuals of the same breed, but having no
common ancestor
1. Outcrossing.
2. Crossbreeding.
3. Inbreeding.
4. Interspecific hybridisation.
Overlap of which of the following atomic orbitals would be maximum to form the strongest covalent bond.
1. 1s-2s (σ)
2. 1s-2p (σ)
3. 2p-2p (π)
4. 2p-2p (σ)
Which of the following pairs constitutes a buffer?
1. HNO2 and NaNO2
2. NaOH and NaCl
3. HNO3 and NH4NO3
4. HCl and KCl
30 ml of 0.06 M solution of the protonated form of an anion acid methionine (H2A+) is treated with 0.09 M NaOH. Calculate pH after addition of 20 ml of base. pKa1, = 2.28 and pKa2 = 9.2.
1. 5.5
2. 5.74
3. 9.5
4. None
Which alcohol is most reactive for dehydrogenation or dehydration?
1.
2.
3.
4.
Which among the following compounds has minimum pH value?
1. butane
2. 2-butene
3. 1-butyne
4. 2-butyne
In the given reaction,
[X] will be
1. 1-phenylpropane
2. 1-phenylpropene
3. trans-1-phenyl propene
4. cis-1-phenylpropene
In the given reaction,
[X] will be:
(1)
(2)
(3)
(4)
Which of the following is the correct order magnitude of Van der Waal's attractive forces?
1.
2.
3.
4.
Correct IUPAC name of the following compound is:
1. 4-(1) 1 dimethylethyl)-5-ethelocatane.
2. 5-ethyl-4-(1, 1-dimethyethyl)octane.
3. 5-(1,1-demethylethyl)-4-ehloctane.
4. 4-ethyl-5-(1. 1-demethylethyl)octane.
Major product is:
1.
2.
3.
4.
On electrolysis of one litre of aq. NaCl, it is observed that after some time pH of the solution becomes 10. Which of the following option is definitely incorrect?
1. At cathode will be liberated
2. Moles of deposited will be half of moles of deposited.
3. will be liberated at anode.
4. 9.65 coulomb charge is passed through the cell.
The cation which is expected to act as ligand is:
1.
2.
3.
4.
An example of an oxide is
1. Zinc blende
2. Bauxite
3. Feldspar
4. Malachite
Which of the following pair of transition metal ions, have the same calculated values of the magnetic moment?
(1)
(2)
(3)
(4)
The number of unidentate ligands in the complex ion is called
(1) Oxidation number
(2) Primary valency
(3) Coordination number
(4) EAN
Chlorobenzene is 0, p-directing in electrophilic substituting reaction. The directing influence is explained by 2
(1) +M of Ph
(2) +l of Cl
(3) +M of Cl
(4) -l of Ph
Identify the reactant.
(1)
(2) HCHO
(3) CO
(4)
24 gms of carbon reacts with 38.4 gms of oxygen gas such that no reactant remain. Calculate moles of carbon mono-oxide obtained in the reaction?
1. 2 moles
2. 1.2 moles
3. 2.4 moles
4. 1.6 moles
Which of the following type of forces are present in nylon-6, 6?
(1) Van der walls forces of attraction
(2) Hydrogen bonding
(3) Three dimensional network of bonds
(4) Metallic bonding
Increasing order (lowest first) for the values of elm for electron (e), proton (p), neutron (n) and a-particles is
(1) e, p, n,
(2) n, , p, e
(3) n, p, e,
(4) n, p, , e
Carbon suboxide has recently been shown as a component of the atmosphere of Venus. Which of the following formulation represent the correct ground state Lewis structure for carbon suboxide?
(1) :O:C::C:C:O:
(2) :O::C::C:C::O:
(3
(4) :O:C:C:C:O:
Which of the following is the most acidic in nature?
1.
2.
3.
4.
Which of the following gases will have a greater tendency to get adsorbed as compared to remaining gases?
1.
2. CO
3.
4.
Which other following reaction involves oxidation and reduction?
(1) NaBr + HCl NaCl + HBr
(2) HBr + AgBr +
(3)
(4)
2N HCl solution will have same molar concentration as a
(1)
(2)
(3)
(4)
During the adsorption of Krypton on activated charcoal at low temperature
1.
2.
3.
4.
Which reaction does not give primary amine
1.
2.
3.
4. None of above
An ideal gas is expanded irreversibly against 10 bar pressure from 20 litres to 30 litres. Calculate 'w' if the process is isoenthalpic.
1. | 0 | 2. | +100J |
3. | -100 J | 4. | -10 kJ |
The efficiency of a cell reaction under standard conditions
is 70%. The standard electrode potential of cell is
(1) 2.176 V
(2) +2.876 V
(3) 1.248 V
(4) +1.648 V
Which of the following expression is correct for zero order and first order respectively [where a is initial concentration]?
(1)
(2)
(3)
(4)
Which of the following ore is used for industrial extraction of aluminium in India?
1. Corundum
2. Cryolite
3. Bauxite
4. Kaolin
Which of the following metal ions is not coloured?
1.
2.
3.
4.
Most stable resonating structure is
1.
2.
3.
4.
Hydrogen bond present in
(1)
(2)
(3) HF
(4) AII
Identify the wrong statement in the following:
(1) Ozone layer does not permit infrared radiation from the sun to reach the earth.
(2) Acid rain is mostly because of oxides of nitrogen and sulphur.
(3) Chlorofluorocarbons are responsible for ozone layer depletion.
(4) Green house effect is responsible for global warming.
Which of following is essential amino acid?
(1) Glycine
(2) Alanine
(3) Valine
(4) None
Which statement is correct for an reaction at chiral carbon?
1. The product will be optically active, but have the opposite configuration.
2. The reaction will involve racemization and partial inversion.
3. The rate of reaction is a function of concentration of nucleophile.
4. The attacking group will be strong electrophile.
Acid hydrolysis of X yields two different organic compounds. Which one of the following is X?
1.
2.
3.
4. (CH3CO)2O
Which of the following is step-growth polymer?
1. PTFE
2. PVC
3. Polyester
4. Polythene
Which among of the following is not an antibiotic?
1. Penicillin
2. Oxytocin
3. Erythromycin
4. Tetracycline
In the equation,
The equivalent weight of hydrogen sulphide is
1. 18
2. 68
3. 34
4. 17
Splitting of spectrum lines in magnetic field is
1. stark effect
2. Raman effect
3. Zeeman effect
4. Rutherford effect
The bond angles of
are in the order
1.
2.
3.
4.
The solubility product of is equal to
1.
2.
3.
4.
A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300K. The vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be
1. 350
2. 300
3. 700
4. 360
The Earth moves in an elliptical orbit with the Sun S at one of foci as shown in the figure. Its kinetic energy is maximum at the point
1. A
2. B
3. C
4. D
When the electrical conductivity of semi-conductor is only due to the breaking of its covalent bonds, then the semiconductor is said to be
1. Donor
2. Acceptor
3. Intrinsic
4. Extrinsic
A vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube.
The tube has a side opening and is also fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to a minimum. If the speed of sound is 350 metre per second, then n is:
1. 500 Hz
2. 1000 Hz
3. 2000 Hz
4. 4000 Hz
Spherical balls of radius ‘R’ are falling in a viscous fluid
of viscosity ‘ ’ with a velocity ‘v’. The retarding viscous
force acting on the spherical ball is -
1. Inversely proportional to both radius ‘R’ and
velocity ‘v’.
2. Directly proportional to both radius ‘R’ and
velocity ‘v’.
3. Directly proportional to ‘R’ but inversely
proportional to ‘v’.
4. Inversely proportional to ‘R’ but directly proportional
to velocity ‘v’.
In the figure shown, the value of so that electric field at centre ‘C’ is along ‘y’-axis only, where and are linear charge densities on semicircular and straight wire respectively, is -
1.
2. 2
3.
4.
The potential difference between points A and B is:
1. 2 V
2. 6 V
3. 4 V
4. 3 V
The current in a coil varies with time t as . If the inductance of coil be 10 mH, the value of induced e.m.f. at \(t=2~\mathrm{s}\) will be:
1. \(0.14~\mathrm{V}\)
2. \(0.12~\mathrm{V}\)
3. \(0.11~\mathrm{V}\)
4. \(0.13~\mathrm{V}\)
Three medium with refractive index n, n and n are as shown in figure. The two beams are parallel to each other, with a beam-1 passing only through the medium I and III, and beam-2 through the medium II and III. Determine the angle between the beams in the medium III.
1.
2.
3.
4. None of these
A student measures the value of g with the help of a simple pendulum using the formula g = . The errors in the measurements of L and T are L and T respectively. In which of the following cases is the error
in the value of g the minimum?
1. L = 0.5cm, T = 0.5s
2. L = 0.2cm, T = 0.2s
3. L = 0.1cm, T = 1.0s
4. L = 0.1cm, T = 0.1s
The banking angle for a curved road of radius \(490\) m for a vehicle moving at \(35\) m/s is:
1.
2.
3.
4.
A block of mass m, lying on a rough horizontal plane, is acted upon by a horizontal force P and another force Q inclined at an angle to the vertical as shown. The block will remain in equilibrium if the coefficient of friction between it and the surface is
(1) (P+Qsin) / (mg+Q cos)
(2) (P cos+Q) / (mg - Q sin)
(3) (P+Q cos) / (mg+Q sin)
(4) (P sin - Q) / (mg - Q cos)
A body is acted upon by a force which is proportional to the distance covered. If distance covered be denoted by x, then work done by the force will be proportional to :-
(1) x
(2)
(3)
(4) none of these
If the rms velocity of oxygen molecule at certain temperature is 0.5 km/s , the rms velocity for hygrogen molecule at the same temperature will be -
(1) 2 km/s
(2) 4 km/s
(3) 9 km/s
(4) 16 km/s
A potentiometer wire of length 3.5 m gives a null point at 3 m for a secondary cell of emf 8 V . The primary circuit contains only an battery of emf 10 V. What is the internal resistance of battery in primary circuit if the resistance of potentiometer wire is 14?
(1) 1
(2) 2
(3) 3
(4) 4
The work done in rotating a magnet of magnetic moment M by an angle of from the external magnetic field direction is 'n' times the corresponding work done to turn it through an angle of where 'n' is given by:-
(1) 1 / 2
(2) 2
(3) 1 / 4
(4) 1
A coil of a mean area of 500 and 1000 turns is held perpendicular to a uniform field of 0.4 Gauss. The coil is turned through in seconds. The average induced e.m.f. is:
1. | 0.04 V | 2. | 0.4 V |
3. | 4 V | 4. | 0.004 V |
An emf of 12 V is induced in a given coil when the current in it changes at the rate of 48 amp/min. The inductance of the coil is:
(1) 0.5 henry
(2) 15 henry
(3) 1.5 henry
(4) 9.6 henry
A plane electromagnetic wave travels in free space along x-axis. At a particular point in space, the electric field along y-axis is 9.3 . The magnetic induction is:
1.
2.
3.
4.
If refractive indices for water and glass are respectively and light is tending to go from glass to water, the critical angle is:-
(1)
(2)
(3)
(4)
In a hypothetical atom, if transition front n = 4 to n = 3 produces visible light then the possible transition to obtain infrared radiation is
(1) n = 5 to n = 3
(2) n = 4 to n = 2
(3) n = 3 to n = 1
(4) none of these
Boxes A and B are sliding to the right across a frictionless table.The hand H is slowing them down. The mass of A is larger than the mass of B. Rank in order, from largest to smallest, the horizontal forces on A, B and H
1.
2.
3.
4.
A wheel of mass 10 kg has a moment of inertia of 160 about its own axis. The radius of gyration is
(1) 10 m
(2) 4 m
(3) 5 m
(4) 10
In an experiment with a sonometer, a tuning fork of frequency 256 Hz resonates with a length of 25 cm and another tuning fork resonates with a length of 16 cm.
If the tension of the string remains constant, then the frequency of the second tuning fork will be:
1. 163.84 Hz
2. 400 Hz
3. 320 Hz
4. 204.8 Hz
A river is 1 km wide. The banks are straight and parallel. The current is 5 km/h and is parallel to the banks. A boat has a maximum speed of 3 km/h in still water. In what direction should the boat head so as to arrive at point B directly opposite to its starting point A?
1. directly across the river
2. head upstream from the line AB
3. head
4. the trip from A to B is not possible with this speed
A car is moving on a circular level road of curvature 300 m. If the coefficient of friction is 0.3 and acceleration due to gravity is 10 , the maximum speed that car can have is-
1.
2.
3.
4.
Two particles 1 and 2 are allowed to descend on two frictionless chords OP and OQ as shown. The ratio of the speeds of the particles 1 and 2 respectively when they reach on the circumference is
1. 1/4
2. 1/2
3.
4. 1
Two rods, one made of aluminium and the other made of steel, having initial lengths \(l_1\) and \(l_2\) are connected together to form a single rod of length . The coefficient of linear expansion for aluminium and steel are and respectively. If the length of each rod increases by the same amount when their temperature is raised by \(t^\circ \mathrm{C},\) then the ratio \(\frac{l_1}{l_1+l_2}\) is:
1.
2.
3.
4.
A vessel contains a liquid of density as shown in figure. The gauge pressure at a point P is
(1) h g
(2) H g
(3) (H-h) g
(4) (H-h) g cos
In the given circuit . If charge at the capacitor is Q. Then the charge at the capacitor will be
(1)
(2)
(3)
(4)
If the charge on a capacitor is increased by 2 coulomb, then energy stored in it increases by 21%. The original charge on the capacitor (in coulomb) is
(1) 10
(2) 20
(3) 30
(4) 40
A simple pendulum has a time period when on the earth's surface and when taken to height R above the earth's surface, where R is the radius of the earth. The value of is:
1. 1
2.
3. 4
4. 2
Two particles A and B of masses respectively and having the same charge are moving in a plane. A uniform magnetic field exists perpendicular to this plane. The speeds of particles are respectively and the trajectories are as shown in figure. Then:
(1)
(2)
(3)
(4)
An inductor (L) and resistance (R) are connected in series with an AC source. The phase difference between voltage (V) and current (i) is .
If the phase difference between V and i remains the same, then the capacitive reactance and impedance of the L-C-R circuit will be:
1. 2R, R
2. R, R
3. R, R
4. 2R, R
A rectangular solid made of carbon has sides of lengths 1.0cm, 2.0 cm and 4.0 cm, lying along the x, y, and z axes, respectively. Determine the resistance for current that passes through the solid in the x-direction.
1.
2.
3.
4.
The reading of vernier scale shown in the figure is:
(Given that 10 vernier scale divisions coincide with 9 main scale divisions)
(1) 54.6 mm
(2) 53.2 mm
(3) 52.7 mm
(4) 54.7 mm
A magnet freely suspended in a vibration magnetometer makes 40 oscillations per minute at place A and 20 oscillations per minute at a place B. If the horizontal component of earth's magnetic field at A is T, then its value at B is
1.
2.
3.
4.
Three equal masses \(\text{(m)}\) are placed at the three vertices of an equilateral triangle of side \(\text{r}\). Work required to double the separation between masses will be:-
1. | \(Gm^2\over r\) | 2. | \(3Gm^2\over r\) |
3. | \({3 \over 2}{Gm^2\over r}\) | 4. | None |
For a magnetic material, graph between intensity of magnetisation and magnetic intensity is as shown in diagram. The material is:
1. Diamagnetic
2. Paramagnetic
3. Ferromagnetic
4. All
White light is used in YDSE experiment. It is seen that at a particular point, the 5th order maxima of violet is formed. At the same point which colour (specify wavelength in nm) forms 5th order minima?
1. 440
2. 330
3. 220
4. 110
In a photoelectric phenomenon, the number of photo-electrons emitted depends on
1. The intensity of incident radiation
2. The frequency of incident radiation
3. The velocity of incident radiation
4. The work function of the photo cathode
The threshold wavelength of a metal is . If wavelength of incident light is , then the maximum kinetic energy of photoelectrons would be-
1. 0.62 eV
2. 26 eV
3. 62 eV
4. 0.26 eV
The energy of an electron in the excited state of H-atom is - 1.5 eV. Then according to Bohr's model, its angular momentum will be:
1. J-sec
2. J-sec
3. J/sec
4. J/sec
Which circuit will not show current in ammeter?
1.
2.
3.
4.
The specific heat at constant volume of mixture of and He will be (moles are same):
1. 3R
2. 1.5R
3. 1.9R
4. 2R