Growth and reproduction are mutually exclusive events in
1. Bacteria and protista.
2. Protista and unicellular fungi.
3. Yeast and Paramoecium.
4. Higher plants and animals.
Which one of the following is incorrect statement?
1. Phosphoenol pyruvic acid is most efficient acceptor in plants.
2. Leaves of plants show kranz anatomy.
3. In CAM plants, acidification (formation of malic acid) occurs in presence of light.
4. Chlorophyll consists of a porphyrin head & a phytol tail.
'Retinal' is present in:
1. Rods
2. Cones
3. Both 1 and 2
4. All the retinal layer
Gene pool of a population tends to remain stable if the population is large, without large-scale mutations, without migration and with
1. Random mating.
2. Moderate environmental changes.
3. Natural selection.
4. Reduction in predators.
How many statements are correct with respect to Prions?
(a) Responsible for neurological disease.
(b) Consists of abnormally folded proteins.
(c) Similar in size to viruses.
(d) Responsible for Bovine spongiform encephalopathy (BSE) or mud cow disease.
(e) Cr-Jacob disease (CJD) in humans.
Options
1. 4
2. 5
3. 2
4. 3
Insectivarous plants are?
1. Autotrophic.
2. Heterotrophic.
3. Partial heterotroph.
4. Osmotroph.
The three domains system of classification holds true for how many statements?
1. It divided kingdom morera into 2-domains.
2. Third domain includes only eukaryotic organisms.
3. It lead to six kingdom classification.
4. All of the above.
Match the following
Classification System Basis
A. Artificial 1. Natural affinities.
B. Natural 2. Number of characters.
C. Phylogenetic 3. One or few character.
D. Numerical 4. Fossil evidence.
Options
A B C D
1. 3 1 4 2
2. 3 4 2 1
3. 1 2 3 4
4. 3 2 4 1
In mosses vegetative reproduction takes place by fragmentation & budding in
1. Primary protonema.
2. Secondary protonema.
3. Rhizoids.
4. Both 1 and 2.
Leaf of plant of which family modifies to store food material.
1. Fabaceae
2. Liliaceae
3. Solanaceae
4. Lamiaceae
How many statements are correct?
(1) Flower is modified shoot.
(2) In flower internode do not elongate.
(3) When shoot tip transformed to flower, it is always solitary.
(4) In racemose, flower is acropetal and in cymose it is basipetal.
Options
1. 3
2. 4
3. 2
4. 1
Which of the following is not correctly matched?
1. Solanaceae
2. Brassicaceae A2+4
3. Fabaceae A(5)+(5)
4. Liliaceae
Find incorrect match
1. Endarch Stem.
2. Exarch Root.
3. Xylem fibre Septate or aseptate.
4. Xylem parenchyma Thick walled.
During secondary growth in dicot stem all of the following happens, except
1. Vascular cambium is more active towards inner side.
2. Primary and secondary phloem gradually gets crushed.
3. Medullary ray become meristamatic.
4. Vascular cambium is completely secondary in origin.
In bilayer of plasma membrane. Non polar tail is made up of?
1. Saturated hydrocarbons.
2. Unsaturated hydrocarbons.
3. Acidic amino acid.
4. Basic amino acid.
Few chromosome have non-staining secondary constrictions at a constant location, also known as :-
1. Cristae
2. Satellite
3. Kinetochores
4. Hub
Statement-1: Xylem transport can be unidirectional and bidirectional.
Statement-2: Both phloem loading and unloading is active process.
Options
1. Both statements are correct.
2. Both statements are incorrect.
3. 1 is correct, 2 is incorrect.
4. 1 is incorrect, 2 is correct.
What is the location of NADP reductase enzyme involved in production of NADPH?
1. Stroma side of the membrane.
2. Mitochondrial matrix.
3. Thylakoid membrane.
4. Thylakoid lumen.
During the process of respiration redox equivalents are removed:
1. In form of hydrogen atom.
2. In form of an electron.
3. In form of H2O.
4. In form of ATP.
An ecosystem is
1. Structural unit of nature.
2. Functional unit of nature.
3. Both 1 and 2.
4. Dynamic unit of nature.
Statements - 1 : In an ecosystem naturient is never lost.
Statement - 2 : Succession starts in an area where no living organisms are present.
Options
1. Both statements are correct.
2. Only 1 statements is correct.
3. Only 2 statements is correct.
4. Both incorrect.
Statement - 1 : Pollination by is rare it is confined to only 30-genra mainly monocots.
Statement - 2 : Majority of aquatic plants are pollinated by wind or insects.
Options
1. Both statements are correct.
2. Both statements are incorrect.
3. Only 1 is correct.
4. Only 2 is correct.
Find incorrect match
1. Polygenic inheritance – Spread across of gradient.
2. Pleiotropy – Single gene multiple phenotype.
3. X body of henking – One each in sperm.
4. Pedigree analysis – Mendelian trait.
How many of the following statements are correct?
(1) Phenyl ketonuria leads to mental retardness.
(2) Thalassemia is quantitative where as sickle-cell anaemia is qualitative.
(3) Possibility of female becoming haemophilic is extramely rare.
(4) 8% of male & 0.4% of females are haemophilic.
Options
1. All
2. 3
3. 2
4. 1
Find incorrect match
1. Joint forest management (JFM) – 1980
2. National forest policy – 1988
3. Chipko movement – 1984
4. Noise as air pollutant – 1987
Find incorrect match
1. Electron static precipitator – Removes 99% particulate matter.
2. Scrubber – Remove SO2
3. Catalytic converter – Non metalic catalyst.
4. CNG – Burns efficiently.
Find incorrect statements
1. In an aquatic ecosystem, GFC is the major conduit for energy flow.
2. In terrestrial ecosystem, DFC is is the major conduit for energy flow.
3. In nature food chain always works in isolation.
4. Even DFC & GFC is linked in nature.
Fructose is contributed to the semen by the secretions of:
1. Seminal vesicles
2. Prostate
3. Bulbourethral glands
4. Testes
The primary oocyte completes the first meiotic division at the stage of:
1. Primordial follicle
2. Primary follicle
3. Secondary follicle
4. Tertiary follicle
Which of the following traits in the garden pea plant would express itself only in homozygous condition?
1. Violet flower color
2. Terminal flower position
3. Green pod color
4. Yellow seed color
progeny resemble both the parents in the case of:
1. Complete dominance
2. Incomplete dominance
3. Codominance
4. Multiple allelism
All the following are examples of Mendelian disorders except:
1. Hemophilia
2. Sickle cell anemia
3. Phenylketonuria
4. Down's syndrome
The salient features of the double helix model of DNA do not include:
1. Backbone constituted bu sugar-phosphate
2. Anti-parallel polarity of the two chains
3. Complementary base pairing
4. Two chains coiled in left handed fashion
What is incorrect regarding semi-conservative replication of DNA?
1. Deoxyribonucleoside triphosphates provide energy for polymerization
2. The discontinuously synthesized fragments are later joined by DNA ligase
3. Unlike in prokaryotes which have a single ori, replication starts at random sites in eukaryotes
4. In eukaryotes it takes place at the S phase of the cell cycle
A transcription unit does not include:
1. Operator
2. Promoter
3. Structural gene
4. Terminator
What is synthesized constitutively in the lac operon?
1. Lactose
2. Repressor
3. Permease
4. Beta-galactosidase
Allelic sequence variation has traditionally been described as a DNA polymorphism if more than one variant at a locus occurs in human population with a frequency greater than:
1. 0.01
2. 0.5
3. 0.66
4. 0.99
Identify the incorrectly matched pair:
1. Humulin First therapeutic rDNA
product approved for human use
2. Golden rice Rice variety produced by
genetic engineering and
enriched with vitamin A
3. Bt Brinjal First GM food approved
for consumption in India
4. Rosie Transgenic cow producing
human protein enriched milk
Which of the following does not characterize mitotic prophase?
1. Chromosomal material condensation
2. Initiation of assembly of mitotic spindle
3. Nuclear envelope breakdown at the beginning
4. Nucleolus disappears by the end
Identify the incorrectly matched pair:
Meiosis stage Event
1. Pachytene Bivalents clearly visible as tetrads
2. Diakinesis Terminalization of chiasmata
3. Anaphase I Splitting of centromere
4. Interkinesis No DNA replication
The calcium binding protein in smooth muscles leading to contraction is:
1. Calmodulin
2. Troponin
3. Tropomyosin
4. Ubiquitin
Identify the incorrectly matched pair:
1. Growth hormone Increases blood glucose level
2. Thyroxin Supports erythropoiesis
3. Cortisol Promotes protein anabolism
4. Glucagon Stimulates gluconeogenesis
Match the following columns
Column-I Column-II
a. Mg2+ (i) Alcohol dehydrogenase
b. Mo (ii) RuBisCO
c. Zn2+ (iii) Catalase
d. Iron (iv) Nitrogenase
1. a(iv), b(ii), c(i), d(iii)
2. a(ii), b(iv), c(i), d(iii)
3. a(ii), b(iv), c(iii), d(i)
4. a(iii), b(i), c(ii), d(iv)
Choose the incorrect statement with respect to pollen grain
1. Exine of the pollen grain has prominent apertures called germ pores where sporopollenin is absent.
2. Inner wall of the pollen grain is called intine.
3. Pollen grains are generally spherical in shape.
4. In 60 percent of angiosperms, pollen is shed at three-called stage.
In STP
1. Primary treatment is a biological process.
2. Flocs are anaerobic and autotrophic microbes.
3. BOD measures the organic matter present in the water.
4. Activated sludge is the effluent of tertiary treatment.
The phytohormone, which was first isolated from human urine, shows
a. Bolting effect.
b. Apical dominance.
c. Control of xylem differentiation.
d. Promote leaf senescence.
e. Ripening of fruit.
f. Initiation of rooting is stem cuttings.
1. b, c and f
2. a, d and e
3. b, e and f
4. a, b and d
Choose the correct statements
a. Perisperm is the persistant nucellus in the seeds of black pepper.
b. Single large cotyledon in grass is situated towards lateral side of the embryonal axis.
c. Seeds are the basis of agriculture.
d. Citrus has only one embryo in a seed.
1. Only a
2. Only a & b
3. Only a, b & c
4. a, b, c & d
In mung bean, resistance to yellow mosaic virus is induced by
1. Mutation breeding
2.Hybridisation
3. Selection
4. Polyploid breeding
The microbial biocontrol agent with species-specific narrow spectrum insecticidal application is
1. Trichoderma
2. Glomus
3. Dragonflies
4. Nucleopolyhedrovirus
“Hotspots of biodiversity”, are/show
1. High degree of endemism.
2. Slow rate of extinction.
3. Less species richness.
4. Only five in India.
Natural aging of lake by biological enrichment of its water is
1. Eutrophication
2. Biomagnification
3. Biofortification
4. Bioprospecting
Fertilization normally occurs in which part of the fallopian tube?
1. Junction of ampulla and isthmus
2. Junction of fimbriae and infundibulum
3. Junction of infundibulum and ampulla
4. Ampulla
Which of the following is not a cause for the rapid increase of Indian population today?
1. A rapid decline in death rate
2. An increase in the number of people in reproducible age
3. An increase in the birth rate
4. A decrease in infant mortality and maternal mortality rates
Change of frequencies of alleles in a population or any deviation from Hardy-Weinberg equilibrium is interpreted as:
1. Organic evolution
2. Genetic drift
3. Saltation
4. Punctuated equilibrium
ELISA is based on the principle of:
1. Complementary base pairing
2. In vitro synthesis of polypeptides
3. Cooperation between innate and acquired immunity
4. Antigen-antibody interaction
Which of the following is/are under the direct neural regulation of the hypothalamus?
1. Anterior pituitary
2. Posterior pituitary
3. Both 1 and 2
4. Pineal
In cochlea, the auditory receptors are:
1. Organ of Corti
2. Ampulla
3. Macula
4. Hair cells
The presence of which of the following is/are indicative of diabetes mellitus?
1. Glucosuria and ketonuria
2. Glycosuria and hematuria
3. Hematuria and ketonuria
4. None of these
The maximum volume of air a person can breathe in after a forced expiration is called as:
1. Inspiratory capacity
2. Functional residual capacity
3. Vital capacity
4. Total lung capacity
Trypsinogen can be activated by:
1. HCl
2. Enterogastrone
3. Trypsin
4. Bicarbonate ions
Inhibition of succinate dehydrogenase by malonate is an example of:
1. Non-competitive inhibition
2. Competitive inhibition
3. Antagonism
4. Synergism
The first pair of wings of a cockroach arises from the:
1. Prothorax
2. Mesothorax
3. Metathorax
4. Anal styles
Which of the following is an oviparous mammal?
1. Balaenoptera
2. Ornithorhynchus
3. Macropus
4. Delphinus
When the heart suddenly stops beating, the condition is called as:
1. CAD
2. Heart failure
3. Cardiac arrest
4. Heart attack
Consider the following characters:
I. Bilaterally symmetrical, triploblastic and coelomate animals.
II. A mantle cavity in which feather like gills re-present.
III. Mouth contains radula – an organ for feeding.
Such organisms will belong to the phylum:
1. Annelida
2. Echinodermata
3. Mollusca
4. Hemichordata
Which of the following is not a fresh water bony fish?
1. Labeo
2. Catla
3. Clarias
4. Exocoetus
Which of the following connects the cytoplasm of adjoining epithelial cells?
1. Tight junctions
2. Adhering junctions
3. Gap junctions
4. All of these
I. Small organic molecules
II. Difficult to remove without denaturing the enzyme
III. Haem is an example
The above characters are of which of the following co-factors of an enzyme?
1. Metal ions
2. Prosthetic groups
3. Co-enzymes
4. Apoenzymes
Consider the characters of a certain digestive enzyme:
I. It is a proteolytic enzyme secreted as zymogen.
II. It acts in an alkaline pH.
III. It activates many pancreatic enzymes.
The digestive enzyme is:
1. Pepsin
2. Enterokinase
3. Cholecystokinin
4. Trypsin
Consider the characters of a respiratory control center in humans:
I. It is located in pons
II. It moderates the functions of respiratory rhythm center
III. Its absence results in an increase in depth of respiration
The respiratory control center is:
1. Pneumotaxic center
2. Apneustic center
3. Chemosensitive zone
4. Dorsal group
Consider the following events during a cardiac cycle:
I. Closure of the AV valves
II. Opening of the semilunar valves
These events occur during:
1. Atrial diastole
2. Atrial systole
3. Ventricular diastole
4. Ventricular systole
Consider the following regarding a compound affecting renal physiology:
I. It is secreted when plasma osmolality is increased
II. It makes collecting duct permeable to water
III. It can act as vasoconstrictor at high doses
The compound is:
1. Aldosterone
2. Atrial Natriuretic Factor
3. ADH
4. Angiotensin
Consider the characters of a particular type of joint:
I. | It is a type of synovial joint |
II. | It enables the bone to move in a 360° angle. |
III. | It is exemplified by joint between humerus and pectoral girdle |
What is this type of joint called?
1. Hinge
2. Ball and socket
3. Pivot
4. Saddle
Consider the characteristics of a certain part of the human brain:
I. It contains neurosecretory cells.
II. It is an important part of the limbic system.
III. It is a part of the diencephalons.
This part of the human brain is:
1. Hypothalamus
2. Medulla oblongata
3. Cerebellum
4. Amygdala
Identify the hormone:
I. It favors glycogenesis
II. It favors fat synthesis and deposition
III. It favors protein anabolism
1. Cortisol
2. Insulin
3. Growth hormone
4. Adrenaline
Consider the characters of a type of mode of reproduction:
I. It is a type of asexual reproduction seen in plants
II. New individuals arise without production of seeds or spores.
III. It is usually considered a cloning metho4.
What is this mode of reproduction called?
1. Parthenogenesis
2. Parthenocarpy
3. Vegetative reproduction
4. Fragmentation
Consider the following characters:
I. It is secreted by the secondary oocyte and granulosa cells
II. It plays an important role in fertilization
III. It is important in prevention of polyspermy
We are talking about:
1. Chorion
2. Vitelline membrane
3. Zona pellucida
4. Corona radiata
Consider the characteristics of a method of contraception:
I. It prevents ovulation
II. They are very effective contraceptives
III. They are very popular especially amongst urban women
This method of contraception is:
1. Barrier contraception
2. Oral contraceptive pills
3. Intra uterine devices
4. Safe period method
Consider the following characters regarding an evolutionary agent:
I. It is a random binomial sampling error in the gene pool
II. It is brought about by chance alone
III. It acts on a small population
What is this evolutionary agent?
1. Mutation
2. Recombination
3. Genetic drift
4. Gene flow
A cell:
I. Loses the property of contact inhibition
II. Shows uncontrolled proliferation
III. Invades the neighboring tissues
This cell is probably:
1. Mutated
2. Cancerous
3. Dedifferentiated
4. Apoptotic
Consider the characters of a scientific technique:
I. It amplifies the gene of interest
II. It is a vital part of molecular diagnosis of diseases
III. It relies on thermal cycling
The technique is
1. ELISA
2. Southern Blot
3. PCR
4. PAGE
GEAC is an Indian Government organization that deals with issues related to:
1. Ozone depletion
2. GM research
3. Loss of biodiversity
4. Use of microbes in dairy products
What is defined as a process in which the fitness of a species (measured in terms of its ‘r’ – the intrinsic rate of increase) is significantly lower in the presence of another species?
1. Natural selection
2. Adaptation
3. Competition
4. Founder effect
Identify the incorrectly matched pair:
1. Cockroach - Unisexual animal
2. Chara - Monoecious plant
3. Marchantia - Dioecious plant
4. Sweet potato - Unisexual flower
The first human – like being or hominid was:
1. Dryopithecus
2. Australopithecus
3. Homo habilis
4. Homo erectus
The practice of mating of animals within the same breed, but having no common ancestors on either side of their pedigree up to 4 – 6 generations, is called:
1. Inbreeding
2. Out crossing
3. Cross breeding
4. Inter-specific hybridization
Which of the following have the ability to replicate within bacterial cells independent of the control of chromosomal DNA?
1. Plastids and plasmids
2. Plasmids and bacteriophages
3. Plastids and mitochondria
4. Plasmids, plastids, bacteriophages and mitochondria
The correct order of the relative contribution of various greenhouse gases to total global warming is:
1. Carbon dioxide > Methane > Nitrous oxide > CFCs
2. Methane > Carbon dioxide > Nitrous oxide > CFCs
3. Methane > Carbon dioxide > CFCs > Nitrous oxide
4. Carbon dioxide > Methane > CFCs > Nitrous oxide
CO2 is utilized for the carboxylation of RuBP inside the bundle sheath cells of:
1. Maize, Sorghum
2. Tomato, Bell pepper
3. Cacti, Sedum
4. Rice, Wheat
Bacillus thuringiensis (Bt) strains have been used for designing novel -
1. Bioinsecticidal plants
2. Bio-mineralization processes
3. Biofertilizers
4. Bio-metallurgical techniques
The Lassaigne's extract is boiled with a concentration HNO3 while testing for halogens. By doing so it:
1. Helps in the precipitation of AgCl.
2. Increases the solubility product of AgCl.
3. Increases the concentration of NO3- ions.
4. Decomposes Na2S and NaCN, if formed.
A compound forms hcp structure. The total number of voids in 0.5 mol will be-
1. 9.0331023
2. 6.0111023
3. 5.0231023
4. 7.0331023
Give the structures of (C) and (D):
1. (C) - , (D) -
2. (C) - , (D) -
3. (C) - , (D) -
4. (C) - , (D) -
Complete the following :
1. A- B-
2. A- B -
3. A- B -
4. A- B-
At room temperature, the average speed of Helium is higher than that of Oxygen by a factor of -
1.
2.
3. 8
4. 6
What volume of ammonia gas at NTP will be required to be passed into 30 mL of 1 to bring down the acid normality to 0.2 N?
1. 480.5 mL
2. 537.6 mL
3. 438.4 mL
4. 556.5 mL
In animals, the stored carbohydrate is:
1. Starch
2. Glycogen
3. Sucrose
4. Fructose
A 500 g toothpaste sample has 0.4 g fluoride concentration. The fluoride concentration in terms of ppm will be -
1. | 200 ppm | 2. | 400 ppm |
3. | 500 ppm | 4. | 800 ppm |
The number of d-electrons in is not equal to
that of the
1. p-electrons in Ne
2. s-electrons in Mg
3. d-electrons in Co+3
4. p-electrons in
The hybridizations of [Ni(CO)4] and [Cr(H2O)6]3+, respectively, are :
1. sp3 and d3sp2
2. dsp2 and d2sp3
3. sp3 and d2sp3
4. dsp2 and sp3d2
Metallic copper dissolves in
1. Dilute HCl
2. Concentrated HCl+conc. HNO3
3. Aqueous KCN
4. Pure ammonia
(B) and (A) are respectively
1.
2.
3.
4.
The total number of 3rd period elements with more than one electron in a 3d orbital is:
1. | 9 | 2. | 11 |
3. | 0 | 4. | 8 |
Percentage ionic character, if electronegativity value of X=2.1 & Y=3.0, is :-
1. | 20 | 2. | 30 |
3. | 17 | 4. | 23 |
lf kinetic energy of an electron in second shell of H-atom is 40 eV then what will be the total energy of electron in its third shell ?
1. 4.44 eV
2. 1.11 eV
3. 8.88 eV
4. 17.78 eV
lf 0.50 L of a 0.60 M SnS solution is electrolyzed for a period of 30 min using a current of 4.60 A. lf inert electrodes are used then what is the final concentration of S remaining in the solution ?[atomic wt. of Sn =119]
1. 0.342 M
2. 0.6 M
3. 0.389 M
4. 0.514 M
17.4 % (w/v) solution at 27 C is isotonic to 5.85 % (w/V) NaCl solution at 27 C. lf NaCl is 100 % ionised, the % ionisation of in aqueous solution is-
[At wt. of K = 39, Na = 23] :-
1. 25 %
2. 75 %
3. 50 %
4. None of the above
The electrode potential of Cu electrode dipped in 0.025 M CuSO4 solution at 298 K is:
(standard reduction potential of Cu = 0.34 V)
1. 0.047 V
2. 0.293 V
3. 0.35 V
4. 0.387 V
Which of the following pair of species don't give on hydrolysis :
1. H
2.
3.
4.
In the process of extraction of silver,
silver ore +
[X] + Zn [Y] + Ag
[X], and [Y] in the above mentioned reaction are:
1. X= [Ag(CN)]; Y = [Zn(CN)]-2
2. X= [Ag(CN)]-3; Y=[Zn(CN)]-2
3. X= [Ag(CN)]; Y=[Zn(CN)]
4. X=[Ag(CN)] ; Y= [Zn(CN)]2
For a reaction:-
lf rate of consumption of BrO is x mol . Then calculate the rate of formation of Br:-
1.
2.
3.
4. 3x
ln, a closed vessel, 50 ml of completely reacts with 200 ml of C2 according to the following equation:
The composition of the gaseous mixture in the system will be:
1. 100 ml
2. 25 ml
3. 75 ml
4. 10 ml
AB3 (g) dissociates as AB3(g) ⇌ AB2(g) + \(\frac{1}{2}\) B2(g) .When the initial pressure of AB3 is 800 torr and the total pressure developed at equilibrium is 900 torr. What fraction of AB3(g) gets dissociated?
1. 10%
2. 12.5%
3. 25%
4. 30%
The concentration of ion in a solution containing 0.1 M HCN and 0.2 M NaCN will be:
( for HCN = )
1. 3.1
2.
3.
4.
The difference in for combustion of benzoic acid at 300 K is equal to-
1. -1.247 kJ
2. +1.247 kJ
3. -1.247 J
4. +1.247 J
The minimum heat of hydrogenation among the following will be shown by -
1. | 2. | ||
3. | 4. |
Match the polymers given in Column-I with their repeating units given in Column-II. Choose the correct option from the codes given below :
Column-I | Column-II |
(a) Polystyrene | (p) |
(b) Novolac | (q) |
(c) Buna-N | (r) |
(d) Acrilan | (s) |
(a) | (b) | (c) | (d) | |
1. | (s) | (r) | (q) | (p) |
2. | (r) | (p) | (s) | (q) |
3. | (p) | (q) | (r) | (s) |
4. | (q) | (s) | (p) | (r) |
Select the structure of chromium complex formed. When the toluene reacts with chromyl chloride to give benzaldehyde on hydrolysis :
1.
2.
3.
4.
The compound 'A' having molecular formula undergoes following reaction
The compound 'A' will be :-
1. CH3-CH2-CH2-NH2
2. CH3-CH2-NH-CH3
3.
4.
Among the following the aromatic compound is :-
The incorrect statement among the following is :
1. The atomic radius of Na is greater than that of Mg.
2. Density of K is more than Na.
3. Melting point & boiling point of Ca are greater than those of Mg.
4. Mg does not react with cold water.
The reaction, among the following, that cannot produce ethane is:
1.
2.
3.
4.
When 4 g of iron is burnt to ferric oxide at a constant pressure, 29.28 kJ of heat is evolved.
The enthalpy of formation of ferric oxide will be-
(At. mass of Fe = 56) ?
1. 81.98 kJ
2. 819.8 kJ
3. 40.99 kJ
4. +819.8 kJ
Compound (A) is :
1.
2.
3.
4.
Complex : Charge of Co is-
1. +2
2. +3
3. +1
4. +4
Brownian motion of colloidal particles is caused by:
1. | Temperature fluctuations within the liquid phase. |
2. | Attraction and repulsion between charges on the colloidal particles. |
3. | Impact of the molecules of the dispersion medium on the colloidal particles. |
4. | None of the above. |
A Brine solution on electrolysis will not give :
1. NaOH
2.
3.
4.
The configuration that shows the outer transition element among the following is:
1. [Rn]7s2
2. [Xe]4f75d16s2
3. [Xe]5d16s2
4. [Rn]5f76d17s2
Given the reaction between 3 gases represented X, Y, Z to give the compound XYZ(g) . At equilibrium concentration of X = 3M, Y = 6M, Z= 9M XYZ = 6M
If the reaction takes place in a sealed vessel at 527°C, then the value of KC
will be :
For HCl solution at , equivalent conductance at infinite dilution, is . The specific conductance of a solution of HCl is . If the apparent degree of dissociation is 90% the normality of the solution is:-
1. 0.90 N
2. 1.0 N
3. 10 N
4. 1.2 N
Which of the following species can act as an oxidising agent?
1.
2.
3.
4.
Compounds with as molecular formula can exhibit-
1. Position isomerism
2. Metamerism
3. Functional isomerism
4. All of the above
Which of the following is most basic?
1. Lu
2. Yb
3. Ce
4. Tb
can't be prepared by -
1.
2.
3.
4.
If , then the value of is:-
1.
2. A + B
3.
4.
In an experiment, the height of an object measured by a vernier callipers having least count of \(0.01~\mathrm{cm}\) is found to be \(5.72~\mathrm{cm}\). When no object is there between jaws of this vernier callipers, the reading of the main scale is \(0.1\) cm and the reading of the vernier scale is \(0.3~\mathrm{mm}\). The correct height of the object is:
1. \( 5.72 \mathrm{~cm} \)
2. \( 5.59 \mathrm{~cm} \)
3. \( 5.85 \mathrm{~cm} \)
4. \( 5.69 \mathrm{~cm}\)
A charge q is enclosed by an imaginary Gaussian surface:-
If the radius of the surface is increasing at a rate , then
1. flux linked with the surface is increasing at a rate
2. flux linked with the surface is decreasing at a rate
3. flux linked with the surface is decreasing at a rate
4. flux linked with the surface is
Two charges, each 4C, are placed at the corners of an equilateral triangle of side 6 cm. The potential at the third corner is:-
1.
2.
3.
4.
The electric field due to an electric dipole at a distance r from its center in axial position is E. If the dipole is rotated through an angle of 90° about its perpendicular axis, the magnitude of the electric field at the same point will be
1. E
2. E/4
3. E/2
4. 2E
The electric potential difference between two parallel plates is 2000 V. If the plates are separated by 2 mm, what is the magnitude of the electrostatic force on a charge of 4 × C located midway between the plates?
1. 4 N
2. 6 N
3. 8 N
4. 1.5 × N
Two objects moving along the same straight line are leaving point A with an acceleration a, 2a, and velocity 2u, u respectively at time t = 0. The distance moved by the objects with respect to point A when one object overtakes the other is:-
1. 3/a
2. 2/a
3. 4/a
4. 6/a
When electric bulbs of the same power, but different marked voltage are connected in series across the power source, their brightness will be:-
1. Proportional to their marked voltage
2. Inversely proportional to their marked voltage
3. Proportional to the square of their marked voltage
4. Inversely proportional to the square of their marked voltage
A potential divider is used to give outputs of 2 V and 3 V from a 5 V source, as shown in the figure.
Which combination of resistances, from the ones given below, give the correct voltages?
1. | \(\mathrm{R}_1=1 \mathrm{k} \Omega, \mathrm{R}_2=1 \mathrm{k} \Omega, \mathrm{R}_3=2 \mathrm{k} \Omega\) |
2. | \(\mathrm{R}_1=2 \mathrm{k} \Omega, \mathrm{R}_2=1 \mathrm{k} \Omega, \mathrm{R}_3=2 \mathrm{k} \Omega\) |
3. | \(\mathrm{R}_1=1 \mathrm{k} \Omega, \mathrm{R}_2=2 \mathrm{k} \Omega, \mathrm{R}_3=2 \mathrm{k} \Omega\) |
4. | \(\mathrm{R}_1=3 \mathrm{k} \Omega, \mathrm{R}_2=2 \mathrm{k} \Omega, \mathrm{R}_3=2 \mathrm{k} \Omega\) |
A particle moves along the positive branch of the curve y = where x = , x, and y are measured in meters and t in second. At t = 2 s, the velocity of the particle is
1. m/s
2. m/s
3. m/s
4. m/s
A deer wants to save her life from a lion. The lion follows a path whose equation is . For saving a life, the deer moves on a path whose equation is
1.
2.
3.
4. both (1) and (3) are correct
In the figure shown, the frictional coefficient between the table and block is 0.2. The ratio of tensions in the right and left strings respectively will be:
1. 17: 24
2. 34: 12
3. 2: 3
4. 3: 2
If you have several 2.0 µF capacitors, each capable of withstanding 200 V without breakdown, how would you assemble a combination that has an equivalent capacitance of 0.4 µF withstanding 1000 V?
1. 5 in parallel
2. 5 in series
3. 8 in parallel
4. 8 in series
Find the maximum value of M/m in the situation shown in the figure so that the system remains at rest. The friction coefficient of both the contact is µ, the string is massless and pulley is frictionless.
1.
2.
3.
4.
An 800 N man undergoing basic training climbs a 12.0 m vertical rope at a constant speed in 8.00 s. His power output is:-
1. 1.8 kW
2. 1.2 kW
3. 2.2 kW
4. 2.8 kW
A point charge is moving in a clockwise direction in a circle with constant speed. Consider the magnetic field produced by the charge at a fixed point P (not at the center of the circle) on the axis of the circle. Then,:-
1. it is constant in magnitude only
2. it is constant in direction only
3. it is constant both in direction and magnitude
4. it is constant neither in magnitude nor in direction
Given, \(F=2x^{2}-3x-2.\) Choose correct option:
1. | \(x = -1/2\) is position of stable equilibrium |
2. | \(x = 2\) is position of stable equilibrium |
3. | \(x = -1/2\) is position of unstable equilibrium |
4. | \(x =2\) is position of neutral equilibrium |
Two identical charged particles enter a uniform magnetic field with the same speed but at angles 30° and 60° with the field. Let a, b and c be the ratio of their time periods, radii and pitches of the helical paths then
1. abc = 1/
2. abc > 1
3. abc < 1
4. a = bc
Magnetic susceptibility of the given paramagnetic substance at room temperature is:
1. 2.8 ×
2. 57
3. 0.19
4. 0.57
Some magnetic flux is changed from a coil of resistance 10 . As a result, an induced current is developed in it, which varies with time as shown in the figure. The magnitude of change in flux through the coil in Wb is:
1. | 2 | 2. | 4 |
3. | 6 | 4. | None of these |
Four particles of mass \(m_1 =2m,~m_2 = 4m,\) \(m_3= m,~\text{and}~m_4\) are placed at four corners of a square. What should be the value of \(m_4\) so that the centre of mass of all four particles is exactly at the centre of the square?
1. \(2m\)
2. \(8m\)
3. \(6m\)
4. none of these
A 10 H inductor carries a current of 20 A. How much ice at 0°C could be melted by the energy stored in the magnetic field of the inductor?
Latent heat of ice is 2.26 × J/kg .
1. | 0.08 kg | 2. | 8.8 kg |
3. | 0.88 kg | 4. | 0.44 kg |
In the circuit shown, the value of RMS current is 11 A. The potential difference across the inductor is:
1. 220 V
2. zero
3. 300 V
4. 200 V
A rod is falling down with constant velocity \(V_0\) as shown. It makes contact with hinge A and rotates around it. The angular velocity of the rod just after the moment when it comes in contact with hinge A is:
1. | \(2 \mathrm{V}_0 / 3 \mathrm{L} \) | 2. | \(3 \mathrm{V}_0 / 2 \mathrm{L} \) |
3. | \(\mathrm{V}_0 / \mathrm{L} \) | 4. | \(2 \mathrm{V}_0 / 5 \mathrm{L}\) |
A rolling object rolls without slipping down an inclined plane (angle of inclination ), then the minimum acceleration it can have is:-
1. gsin
2. 2gsin/3
3. gsin/2
4. zero
Equal temperature differences exist between the ends of two metallic rods 1 and 2 of equal lengths. Their thermal conductivities are and areas of the cross-section are , respectively. The condition of equal rate of heat transfer is:-
1.
2.
3.
4.
A hot body emits the energy at the rate of 16 J and its most intense radiation corresponds to wavelength 20,000 Å. When the temperature of this body is further increased and its most intense radiation corresponds to 10,000 Å. Then the energy radiated at this temperature in J will be:-
1. 4
2. 1
3. 64
4. 256
If we observe the single slit Fraunhofer diffraction with wavelength and slit width d, the width of the central maxima is 2 , On decreasing the slit width for the same :
1. increases
2. remains unchanged
3. decreases
4. increases or decreases depending on the intensity of light
During an adiabatic process, the pressure of a gas is found to be proportional to the fourth power of its absolute temperature. The ideal gas would be :
1.
2. He
3. The mixture of and He
4.
The efficiency of a Carnot engine is 40% when it receives energy at 500 K. At what temperature it should receive energy to increase its efficiency by 25%:-
1. 600 K
2. 700 K
3. 800 K
4. 900 K
A simple magnifying lens is used in such a way that an image is formed at 25 cm away from the eye. In order to have 10 times magnification, the focal length of the lens should be:-
1. 5 cm
2. 2 cm
3. 25 mm
4. 0.1 mm
Choose the correct mirror image of the figure:
1. | 2. | ||
3. | 4. |
Two white dots are 1 mm apart on a black paper. They are viewed by the eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye?
(Take wavelength of light = 500 nm)
1. 5 m
2. 1 m
3. 6 m
4. 3 m
The cylindrical vessel is kept on a horizontal surface as shown in the figure. The speed of water coming out through a small hole:-
1. 6 m/s
2. 0.6 m/s
3. 11 m/s
4. 1.1 m/s
Water flows through a horizontal tube of variable cross-section. The area of the cross-section at A and B are 4 and 2 respectively. If 1 cc of water enters per second through A, then the speed of the water at B is:-
1. 25 cm/s
2. 50 cm/s
3. 100 cm/s
4. 5 cm/s
The plane wavefront is incident on a spherical mirror as shown. The reflected wavefront will be:
1. | 2. | ||
3. | 4. |
The count rate from 100 of a radioactive liquid is C. Some of this liquid is now discarded. The count rate of the remaining liquid is found to be C/10 after three half-lives. The volume of the remaining liquid in is:
1. 20
2. 40
3. 60
4. 80
A helium nucleus can be produced by fusing two deuterium nuclei. If the nuclear masses of deuterium and helium nuclei are 2.0149 a.m.u. and 4.0027 amu respectively, then the energy liberated in this process is:-
1. 28.3 MeV
2. 25.24 MeV
3. 47.6 MeV
4. 11.9 MeV
X-rays incident on a material:-
1. exerts a force on it
2. transfer energy to it
3. transfer momentum and impulse both to it
4. All of the above
The coefficient of friction between the block of masses m and 2m is µ = 2tan . There is no friction between the block of mass 2m and inclined plane. The maximum amplitude of the two-block system for which there is no relative motion between both blocks is:-
1.
2.
3.
4.
A vibrating tuning fork of frequency 1000 Hz 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 x distance, the intensity of sound changes from a maximum to a minimum for an observer at the side opening. If the speed of sound is 350 meters per second, then x is-
1. 35 cm
2. 17.5 cm
3. 8.75 cm
4. 10 cm
The combination of gates shown below is equivalent to:
1. AND gate
2. XOR gate
3. NOR gate
4. NAND gate
A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the source as 1000 Hz. What will be the apparent frequency of the source when it is moving away from the observer after crossing him? The velocity of the sound in the medium is 350 m/s:-
1. 750 Hz
2. 857 Hz
3. 1143 Hz
4. 1333 Hz
Find the base resistance in the circuit below, if \(\beta_{DC} =90\) and \(V_{BE}=0.7~V.\)
1. 83
2. 41 k
3. 83 k
4. 41
A combination of logic gates has the truth table below
P Q Z
0 0 0
0 1 1
1 0 1
1 1 1
Which of the following combinations has this truth table?
1.
2.
3.
4.