Which of the following statement is not correct for pollen grain?
1. It represents male gametophyte.
2. It is a spherical structure, about 25-50 micrometers in diameter.
3. Pollen grains are rich in nutrients.
4. In family rosaceae, leguminoseae and solanaceae pollen lose viability in 30 minute.
A plant, on repeated self pollination, preserves the trait expressed for many generations. Such a plant is said to be:
(1) Panmictic
(2) Homologous
(3) Apomictic
(4) Pure line
If a new allele suddenly becomes very abundant in a population, most likely it is :
1. mutating rapidly
2. flowing with emigrants
3. strongly selected for
4. a product of assortative mating
Natural selection is best defined as occurring when the environment causes :
1. differential success in reproduction
2. differential mortality
3. assortative mating
4. a reduced gene pool
In allopatric speciation, initial barrier to gene flow is :
1. behavioral
2. postzygotic
3. geographic
4. ecological
What is incorrect for companion cell?
1. It is specialized parenchymatous cell.
2. It helps in maintaining the pressure gradient in the sieve tubes.
3. It does not retain nucleus throughout the life.
4. It is absent in gymnosperms
State True (T) or False (F) to the given statements and
select the correct option
(A) All tissue layers exterior to the vascular cambium
constitute bark.
(B) Root hypodermis is sclerenchymatous.
(C) Ground tissue of leaves is called mesophyll.
(D) Due to presence of casparian strips, endodermis
is impervious to water.
(A) (B) (C) (D)
1. T F F T
2. T F T T
3. F T T F
4. T F T F
Cymose inflorescence is dissimilar to racemose inflorescence in
1. Having limited growth of the main inflorenscence axis.
2. Having young flowers at top.
3. Showing centriperal manner of opening of flowers.
4. Having acropetal arrangement of flowers.
Match the classes of pteridophyte given in column-I with their respective members given in column-II
Column I | Column II | ||
(a) | Psilopsida | (i) | Selaginella |
(b) | Lycopsida | (ii) | Adiantum |
(c) | Pteropsida | (iii) | Psilotum |
(d) | Sphenopsida | (iv) | Equisetum |
Select the correct answer from the following
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (i) | (iii) | (ii) | (iv) |
3. | (iii) | (i) | (ii) | (iv) |
4. | (i) | (iv) | (iii) | (ii) |
Read the following statements and select the incorrect
ones
(a) Mosses have an elaborate mechanism of spore
dispersal.
(b) In liverworts, the haploid free living sporophyte is
formed by spore germination.
(c) Vegetative reproduction in Polytrichum occurs by
budding in the secondary protenema.
(d) Marchantia is a heterosporous bryophyte.
(e) Growth of bog moss ultimately fills ponds and lakes
with soil
1. (a), (b) and (c)
2. (d) and (e) only
3. (b) and (d) only
4. All except (a)
Which of the following characters, are defining features
of all living organisms?
(A) Growth from inside
(B) Sexual reproduction
(C) Metabolism
(D) Response to stimuli
(E) Cellular organisation
1. Only (C), (D) and (E)
2. Only (A) and (B)
3. Only (B), (C) and (D)
4. All except (B)
Endoplasmic reticulum plays a role in origin of A which is lined by B and contains a fine tubule called C . Select the option that correctly fills the blanks:
A B C
1. Lysosome Plasma Membrane Golgi body
2. Cytoskeleton Vacuole Desmotubule
3. Plasmodesmata Plasma Membrane Desmotubule
4. Plasmodesmata Cell Wall Vacuole
Select the correct statement with respect to axoneme of eukaryotic flagella.
1. It is composed of 9 peripheral triplet microfibrils of tubulin proteins.
2. It does not have covering of plasma membrane.
3. Central tubules are enclosed by a central sheath.
4. It gives rise to spindle apparatus during cell division.
Chlamydomonas, Chlorella, Volvox, Ulothrix, Fucus,
Dictyota, Polysiphonia, Gelidium, Acetabularia,
Laminaria Out of these 10 organisms, how many
organisms belong to the class chlorophyceae,
phaeophyceae and rhodophyceae respectively?
1. 4, 3, 3
2. 4, 4, 2
3. 5, 3, 2
4. 6, 2, 2
Out of the following examples, how many are belonging
to Fabaceae, Solanaceae, Liliaceae?
Aloe, Indigofera, Asparagus, Colchicum, Belladonna,
Mulaithi
Fabaceae Solanaceae Liliaceae
1. 3 2 1
2. 2 2 2
3. 2 1 3
4. 4 1 1
Which of the following structure is associated with
locomotion ?
(i) Parapodia.
(ii) Water vascular system.
(iii) Radula.
(iv) Proboscis.
1. (i), (ii), (iii), (iv)
2. (i) only
3. (i), (ii) only
4. (i), (iii) only
Blood is different from other connective tissue
because
(i) It is mesodermal in origin.
(ii) Blood cells do not form the composition of blood
plasma or matrix.
(iii) It contains different kind of cells performing
different function.
(iv) It lack fibres.
1. (i), (ii), (iii), (iv)
2. (ii), (iv) only
3. (iv) only
4. (ii) only
Areolar connective tissue contains
(i) Semi-fluid ground substance containing modified
polysaccharide.
(ii) Fibroblast cells.
(iii) Mast cells.
(iv) Macrophages.
1. (i), (ii), (iii), (iv)
2. (ii), (iii), (iv) only
3. (i), (ii) only
4. (i) only
Congestive heart failure is often linked to:
1. Congestion of lungs which commonly occur in
asthmatics and smokers.
2. Damage of heart muscles by an inadequate
blood supply.
3. Deposition of calcium, fat, cholesterol, and fibrous
tissues in the coronary arteries.
4. Blockage of AVN.
Which of the following physiological changes is not associated with Renin– Angiotensin-Aldosterone system?
1. Increase in GFR
2. Increase in blood pressure
3. Increase in blood aldosterone level
4. Increase in tubular secretion
Angiotensinogen is produced by
1. Juxtaglomerular cells
2. Liver
3. Macula densa
4. Lungs
Find the wrong match.
1. Wheat → Pusa Shubra
2. Cauliflower → Pusa Snowball K-1
3. Chilli → Pusa Sadabahar
4. Brassica → Pusa Swarnim
The above given diagram is an enlarged view of one microsporangium of a matured anther. Identify A, B and C
1. A - Middle layer, B - Endothecium, C – Tapetum
2. A - Endothecium, B - Tapetum, C - Middle layer
3. A - Endothecium, B - Middle layer, C – Tapetum
4. A- Tapetum, B - Middle layer, C – Endothecium
The inner wall of pollen grain:
1. Is thin, continuous and pecto-cellulosic and is called intine
2. Comes out in the form of pollen tube through germpore
3. Is thick and consists of sporopollenin
4. (1) and (2)
Consider the following four statements (A-D) related to Green house effect and Global warming and select the correct option stating which one are true (T) and which ones are false (F).
Statements
(A) It is responsible for maintaining average temperature at 18ºC
(B) CO2, CH4, CFC, N2O are green house gases
(C) Responsible for El Nino Effect
(D) Montreal protocol is for this
Options
A B C D
1. T T F F
2. F F T T
3. F T T F
4. T F F T
World Summit on sustainable development held in 2002 in
1. Rio de Janeiro
2. Japan
3. Johannesburg
4. London
Which of the following sequences best represents the pathway of an action potential through the Heart's conduction system?
(i) Sino-atrial (SA) node
(ii) Purkinje fibres
(iii) Bundle of His
(iv) Atrio-ventricular (AV) node
(v) Right and left bundle branches
1. (i),(iv),(iii),(ii),(v)
2. (iv), (i),(iii),(v),(ii)
3. (iii),(iv),(i),(ii),(v)
4. (i),(iv),(iii),(v),(ii)
Select the option having all the correct characteristics :
Structure | Percentage | Function | |
1. | 0.3-0.5 | Phagocytic | |
2. | 0.5-1.0 | Secrete histamine | |
3. | 30-40 | Defense against parasites | |
4. | 30-40 | Allergic reactions |
Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair
|
Pairs of skeletal parts |
Category |
1. |
Malleus and stapes |
Ear ossicles |
2. |
Sternum and ribs |
Axial skeleton |
3. |
Clavicle and glenoid cavity |
Pelvic girdle |
4. |
Humerus and ulna |
Appendicular skeleton |
Select the correct statement regarding the specific disorder of muscular or skeletal system
1. Myasthenia gravis- Autoimmune disorder which inhibits sliding of myosin filaments
2. Gout-inflammation of joints due to extra deposition of calcium
3. Muscular dystrophy-Age related shortening of muscles
4. Osteoporosis-Decrease in bone mass and higher chances of fractures with advancing age
Partial pressure of in alveoli of lungs:
1. Is equal to that in the deoxygenated blood.
2. Is more than that in the deoxygenated blood.
3. Is less than that in the deoxygenated blood.
4. Is more than that of in alveoli.
Select the incorrect statement:
1. | Na+/K+ ATPase is an electrogenic pump that helps to maintain an electrochemical ionic gradient across axolemma. |
2. | At rest, axoplasm has lower ions concentration than ion concentration. |
3. | Brain stem comprises midbrain, pons, and medulla oblongata. |
4. | Thalamus part of the hindbrain is responsible for emotions like anger and rage. |
Choose the odd one with respect to effects of sympathetic nervous system
1. Inhibits secretion of saliva
2. Inhibits secretion of gastric juice
3. Inhibits secretion of pancreatic juice
4. Promotes secretion of intestinal juice
Which one of the following sets of animals belong to a single taxonomic group?
1. Cuttlefish, jellyfish, silverfish, dogfish, starfish
2. Bat, pigeon, butterfly
3. Monkey, chimpanzee, man
4. Silkworm, tapeworm, earthworm
Select the correct statement about class-Aves
1. They are warm blooded (homoiothermous) animals and are able to maintain a constant body temperature
2. Respiration occurs through lungs and air sacs connected to lungs for supplement respiration
3. They are oviparous with separate sexes, internal fertilisation and direct development
4. All of the above
If the sequence of bases in one of the DNA strand is AGGAG AA, then the sequence of bases in the other complementary strand of DNA would be
1. CCTTCTT
2. TCTCTCC
3. TCCTCTT
4. CCTCTCT
Adenosine Triphosphate (ATP) liberates high energy by the breakdown of
1. Glycosidic bond
2. Hydrogen bond
3. Phosphate bond
4. Both 1 and 3
All chromosomes of a cell are directed towards one side and are attached to the nuclear membrane, can be observed in
1. Leptotene
2. Zygotene
3. Pachytene
4. Diplotene
Interphase is called the resting phase because
1. It is the most active phase of the cell cycle
2. There is no apparent activity related to the cell division.
3. It does not prepare cell for cell division.
4. It is the phase where cell rests before entering into mitosis.
An enzyme not used in Krebs cycle is
1. Aconitase
2. Decarboxylase
3. Fumarase
4. Aldolase
One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third hormone increases the tolerance of plants to various stresses. They are respectively:
1. Gibberellin, Auxin, Ethylene
2. Auxin, Gibberellin, Cytokinin
3. Gibberellin, Auxin, ABA
4. Auxin, Gibberellin, ABA
Which of the following is a modification of mucosa of the alimentary canal?
1. Villi
2. Microvilli
3. Rugae
4. All of these
Choose the correct labelling for given figure
1. D-saturation point, E-Maximum photosynthesis.
2. A-achieved at high light intensity.
3. D-10% of total sunlight, E-Compensation point.
4. A-light saturation at 10% of total sunlight.
During coitus the human male ejaculates about
1. 200 to 400 million sperms
2. 100 to 200 million sperms
3. 200 to 300 sperms
4. 200 to 300 billion sperms
The main cause of the disintegration of the endometrial lining
1. LH surge
2. Degeneration of corpus luteum
3. Ovulation during mid-cycle
4. Implantation leads to pregnancy
Which amino acid is substituted in Sickle cell anaemia?
1. Glutamic acid by valine in -chain
2. Glutamic acid by valine in -chain
3. Valine by glutamic acid in -chain
4. Valine by glutamic acid in -chain
In case of snake bite the injection which is given to patient is example of -
1. passive immunity
2. active immunity
3. both 1 and 2
4. natural immunity
Identify the stage of sewage treatment shown below.
1. Primary treatment
2. Secondary treatment
3. Tertiary treatment
4. Filtration and sedimentation
Cystic fibrosis, Myotonic dystrophy and Thalassemia are
1. Chromosomal disorders
2. Autosomal recessive disorders
3. Mendelian disorders
4. Autosomal dominant disorders
Packaging of DNA helix
1. Involves polyamines in eukaryotes
2. Occurs with the help of NHC proteins only.
3. Requires acidic proteins that help in coiling of DNA in prokaryotes.
4. Is more complex in eukaryotes than prokaryotes.
In the technique of DNA fingerprinting digestion of DNA is followed by
1. Electrophoresis
2. Hybridisation
3. Denaturation
4. Southern blotting
Which of the following statement is not correct regarding malarial infection?
1. Plasmodium enters the human body as sporozoites through the bite of freshly moulted female Anopheles mosquito
2. High fever recurring every three to four days
3. Sporozoites initially multiple within the liver cells and then attack the RBCs resulting in their rupture.
4. When a female Anopheles mosquito bites an infected person, these parasites enter the mosquito's body and undergo further development.
What is the net gain in a Krebs cycle?
1.
2.
3.
4.
A normal woman, whose father had colour blindness, married a normal man. What is the chance of occurrence of colour blindness in the progeny?
1. 25%
2. 50%
3. 100%
4. 74%
Which of the following statement is not true of two genes that show 50% recombination frequency?
1. The genes are tightly linked
2. The genes show independent assortment
3. If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis
4. The genes may be on different chromosomes
What is incorrect for UTR?
1. Present in between the translational unit in mRNA
2. Not recognised by any tRNA
3. Required for efficient translation process
4. Provide stability to mRNA
In a sewage treatment plant, primary treatment is
1. Physical process which involves sedimentation only
2. Physical process which involves both filtration and sedimentation
3. Biological process which involves formation of primary sludge and effluent
4. Biological process which involves both filtration and sedimentation
Separation and purification by filtration, centrifugation of desired compound produced in bioreactor is a part of
1. Downstream processing only
2. Scaling up and downstream processing
3. Upstream processing
4. Screening for recombinants and downstream processing
Morula stage is related to:
1. 8 -16 celled
2. After the fertilization stage
3. Before the blastocyst stage
4. All of these
Which enzyme is required to prevent unwanted self-ligation of vector DNA molecules in recombinant DNA technology
1. DNA polymerase
2. DNA ligase
3. Alkaline phosphatase
4. Reverse transcriptase
Bio-prospecting is exploring molecular, genetic and species-level diversity for products of
1. Ecosystem services
2. Economic benefits
3. Aesthetic pleasures
4. Both 1 and 3
Which of the following is an amide involved in nitrogen metabolism by plants?
1. Methionine
2. Cysteine
3. Serine
4. Asparagine
Which is not true regarding cyclic electron transfer system (ETS) in thylakoid membrane of higher plants?
1. Operates at low light intensity
2. Only PS I is involved
3. Acts as a back up for ATP synthesis
4. External electron donor is required
Which of the following will not suffer from minimata disease?
1. Rabbit
2. Seal
3. Fish
4. More than one option is correct
Flamingoes, corymorants or cranes will be harmed the most if the aquatic system is polluted by
1.
2. Fertilizers
3. DDT
4. Domestic sewage
Pick the correct set of gases labelled A, B, C and D in the given figure showing their respective contribution to global warming
1.
2.
3.
4.
In fungi, asexual reproduction takes place by
1. Fission, conidia and ascospores
2. Conidia, hypnospores and zoospores
3. Conidia, sporangiospores and zoospores
4. Sporangiospores, conidia and basidiospores
Simple diffusion is not saturated because
1. There is no requirement of energy
2. There is no requirement of carrier protein
4. It occurs along the concentration gradient
4. More than one option is correct
Which of the following statement is correct for Deuteromycetes?
1. | A large number of them are decomposers of litter, but do not help in mineral cycling |
2. | Mycelium is septate and branched |
3. | They may have three names, one for vegetative stage and two for asexual stage |
4. | Common asexual spore is oidia |
Which of the following hormone is secreted from the intestinal mucosa and stimulates the release of enzymes in the pancreatic juice?
1. Secretin
2. Cholecystokinin
3. Erterocrinin
4. Duocrinin
When moving in a car that is speeding up or slowing down, the sense of linear acceleration is provided by:
1. Organ of Corti
2. Cochlea
3. Macula
4. Semicircular canals
As a person grows older, the lens of the eye grows larger and thicker and becomes far less elastic, partly because of progressive denaturation of the lens proteins, affecting the accommodation power of the eye. The disorder is known as
1. Astigmatism
2. Presbyopia
3. Hypermetropia
4. Glaucoma
Which of the following is not a secondary metabolite?
1. Antibiotics
2. Vitamins
3. Carotenoids
4. Morphine
The analogue of hirudin, from the saliva of leech, found in human blood is
1. Antithrombin
2. Gamma globulin
3. Histamine
4. heparin
Which of the following statements is not true for cellulose?
1. Cellulose is the most abundant organic compound in the biosphere
2. It is a branched polymer of -glucose
3. The artificial fibre rayon is prepared from cellulose
4. Carboxymethyl cellulose is added to ice-cream, cosmetics and medicines to emulsify and give a smooth texture
Besides the feedback control by other hormones and metabolites, secretions of some hormones are controlled by nerves also, Example is
1. Maintenance of level of thyroxine in our body
2. Maintenance of blood sugar homeostasis
3. Secretion of epinephrine by the adrenal medulla
4. Secretion of pituitary gonadotropins
Conn's syndrome is due to
1. Excess secretion of cortisol from the adrenal cortex
2. Excess secretion of aldosterone from the adrenal cortex
3. Less secretion of parathyroid hormone from parathyroid glands
4. Deficiency of thyroid hormones
Which of the following hormone binds with membrane-bound receptors?
1. Thyroxine
2. FSH
3. Estrogen
4. Cortisone
In case of a decrease in the carbon dioxide concentration of blood, the Hb- saturation curve will shift towards:
1. Right side
2. Left side
3. No change in the position of the saturation curve
4. First right and then left
Which contraceptive method is highly effective but has very poor reversibility?
1. lUDs
2. Implants
3. Injectables
4. Sterilization
Prevention of transmission of STDs is possible by
1. Avoiding sex with unknown persons/multiple persons
2. Using condoms during coitus
3. Consulting a qualified doctor for early detection and getting complete treatment if diagnosed with disease
4. All of these
The Indian government has set up an organization, ____________ which will make decisions regarding the validity of GM research and the safety of introducing GM-organisms for public use
1. GEAC
2. Indian Patents Authority
3. Ministry of Forestry
4. Intellectual Properties Authority
Bacillus thuringiensis
1. Provides resistance in plants like Bt cotton, Bt corn, rice, etc. against abiotic stresses
2. Increases efficiency of Bt toxin in alkaline medium
3. Possesses cry gene that confers the ability to synthesize an inactive crystalline protein
4. Creates pores in the foregut of insects
Coconut liquid endosperm is
1. Free nuclear type
2. Cellular type
3. Helobial type
4. Mosaic endospermous condition
if 8 individuals in a laboratory population of 40 fruit flies died during a specified time interval, say two weeks, the death rate in the population during this period is
1
2
3
4
Choose the odd one with respect to trophic level
1 zooplanktons
2 tadpole
3 grasshopper
4 phytoplanktons
Photosynthetic organ originates from _______ meristem and arranged in ______ order.
1. Lateral, basipetal
2. Root apical, acropetal
3. Shoot apical, acropetal
4. Intercalary, acropetal
During primary succession in water body, the pioneers are ____________, they are replaced by _____________ with time
1. Phytoplanktons, rooted hydrophytes
2. Free floating hydrophytes, rooted hydrophytes
3. Phytoplanktons, rooted submerged plants
4. Free floating angiosperms, sedges
Which of the given pyramid can be spindle shaped?
1. If prepared for numbers, for a tree having grazing food chain
2. If prepared for number in parasitic food chain on a tree
3. If Prepared for biomass of a tree
4. If prepared for biomass in a Grassland
In Euphorbia, there are 10 cyathia inflorescence and each inflorescence contains 20 flowers. One female flower produces 6 seeds. Calculate the total number of seeds produced by 10 cyathia
1.
2.
3.
4.
An absorption line of the lowest frequency in the transition of hydrogen spectra is
1. n=1 to n=2
2. n=3 to n=8
3. n=2 to n=1
4. n=8 to n=3
In the above compound, Cl will liberate easily in the form of-
1.
2. Cl-
3. Cl
4. Cl2+
The product (B) in the above-mentioned reaction is-
1. | 2. | ||
3. | 4. |
A combination of nitrocellulose and nitroglycerine is a propellant of the type:
1. Hybrid propellant.
2. Mono propellant.
3. Double based propellant.
4. Biliquid propellant.
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of :
1. Al2O3 + HF + NaAlF4
2. Al2O3 + CaF2 + NaAlF4
3. Al2O3 + Na3AlF6 + CaF2
4. Al2O3 + KF +Na3AlF6
Pb and Sn are extracted from their chief ore by:
1. carbon reduction and self-reduction respectively.
2. self-reduction and carbon reduction respectively.
3. electrolysis and self-reduction respectively.
4. self-reduction and self-reduction respectively.
Sulphur burns according to the reaction
What volume of air, at 1 atm and 273 K, containing 21% oxygen by volume is required to completely burn sulphur present in 200 g of the sample?
(This sample contains 20% inert material which does not burn)
1. 23.52 litre
2. 320 litre
3. 112 litre
4. 533.33 litre
The equivalent weight of in the given reaction is:
1. 16.25
2. 36.5
3. 73
4. 85.1
Major product 'A' and 'B' are respectively
1.
2.
3.
4.
Which of the following is the most suitable major product?
1. 2.
3. 4.
Compound (A) in the given reaction is:
1. | 2. | ||
3. | 4. |
An organic compound (A) of the molecular formula gives a positive Iodoform test but does not reduce Tollen's reagent. When (A) is subjected to acid-catalyzed hydrolysis, another compound B is formed which gives positive Tollen's test. Identify the unknown compound (A).
1.
2.
3.
4.
Photons of wavelength 4000 are used to break molecules. The percentage of energy converted to the kinetic energy of atoms will be :
(bond dissociation energy of the molecule is 246.5 kJ/mol)
1. 12%
2. 8%
3. 26%
4. 17%
Glucose
1. Heptanoic acid
2. 2-Iodohexane
3. Heptane
4. Heptanol
Among the following hormones, which one contains iodine?
1. Insulin
2. Testosterone
3. Adrenaline
4. Thyroxine
The pair of amphoteric hydroxides is
1.
2.
3.
4.
An endothermic reaction with high activation energy for the forward reaction is given by the diagram
1.
2.
3.
4.
Given the following reaction:
The structure of the major product is:
1. | |
2. | |
3. | |
4. |
The major product of the following reaction is -
-
1.
2.
3.
4.
KOH react with O3. The product formed is/are
1. KO2, O2 and H2O
2. KO3, O2 and H2O
3. K2O2, O2 and H2O
4. K2O, O2 and H2O
Which of the following compound can be used as a purgative?
1. HgCl2
2. ZnCl2
3. Hg2Cl2
4. ZnSO4.7H2O
When excess of KCN is added to a solution of CuSO4, the final product obtained is,
1. K2[Cu(CN)4]
2. K3[Cu(CN)4]
3. CuCN
4. K[Cu(CN)2]
1,2-dibromopropane on treatment with X moles of followed by treatment with ethyl bromine gave a pent-2-yne. The value of X is -
1. 1
2. 2
3. 3
4. 4
If α is the degree of dissociation of Na2SO4, the vant Hoff’s factor (i) used for
calculating the molecular mass is
1. 1 + α
2. 1 - α
3. 1 + 2α
4. 1 – 2 α
An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centers of the faces of the cube. The empirical formula for this compound would be :
1. AB
2. A2B
3. AB3
4. A3B
Polyamide is represented by:
1. Teflon
2. Nylon – 6,6
3. Terylene
4. Bakelite
Aluminium oxide may be electrolysed at 1000 C to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is:
To prepare 5.12 kg of aluminium metal by this method, would require :
1. of electricity
2. of electricity
3. of electricity
4. of electricity
Consider the reaction: carried out at constant temperature and
pressure. If ∆H and ∆U are the enthalpy and internal energy changes for the
reaction. The correct expressions among the following is -
1. ∆H = 0
2. ∆H = ∆U
3. ∆H <∆U
4. ∆H > ∆U
The solubility product of a salt having general formula MX2, in water is: . The concentration of M2+ ions in the aqueous solution of the salt is
1.
2.
3.
4.
Electrolyte |
KCl |
KNO3 |
HCl |
NaOAc |
NaCl |
(Scm2mol-1) |
149.9 |
145.0 |
426.2 |
91.0 |
126.5 |
Calculate Using appropriate molar conductances of the electrolytes listed
above at infinite dilution in H2O at 25°C
1. 517.2
2. 552.7
3. 390.7
4. 217.5
Most probable mechanism for this reaction is-
1. E1
2. E2
3.
4. elimination
Which one of the following molecules is expected to exhibit diamagnetic behaviour
a.
b.
c.
d.
1. a,b
2. a,c
3.b,c,d
4.a,b,d
For gaseous state, if most probable speed is denoted by C*, average speed by and mean square speed by C, then for a large number of molecules the ratios of these speeds are :
1. C* : : C = 1.225 : 1.128 : 1
2. C* : : C = 1.128 : 1.225 : 1
3. C* : : C = 1 : 1.128 : 1.225
4. C* : : C = 1 : 1.225 : 1.128
The rate of a reaction doubles when its temperature changes from 300 K to 310 K. The activation energy of such a reaction will be:
\((R=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1} \text { and } \log 2=0.301)\)
1. | \(53.6 \mathrm{~kJ} \mathrm{~mol}^{-1} \) | 2. | \(68.6 \mathrm{~kJ} \mathrm{~mol}^{-1} \) |
3. | \(59.5 \mathrm{~kJ} \mathrm{~mol}^{-1} \) | 4. | \(70.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\) |
Which of the following statements is false?
1. | V2+ < Cr2+ < Mn2+ < Fe2+ : Paramagnetic behaviour |
2. | Ni2+ < Co2+ < Fe2+ < Mn2+ : Ionic size |
3. | Co3+ < Fe3+ < Cr3+ < Sc3+ : Stability in aqueous solution |
4. | Sc < Ti < Cr < Mn : Number of oxidation states |
Among the following species, the H–X–H angle (X=B,N or P) follows the order
1.
2.
3.
4.
The ionic radii of Na+, F–, O2–, N3– follow the order
1. O2– > F– > Na+ > N3–
2. N3– > Na+ > F– > O2–
3. N3– > O2– > F– > Na+
4. Na+ > F– > O2– > N3–
The oxoacid of phosphorus having the strongest reducing property is
1. H3PO3
2. H3PO2
3. H3PO4
4. H4P2O7
Among C, S and P, the element(s) that produce (s) SO2 on reaction with hot conc. H2SO4 is/are
1. only S
2. only C and S
3. only S and P
4. C, S and P
Which of the following statements is false?
1. ONCl and are isoelectronic.
2. molecule is bent
3. Ozone is violet-black in solid-state
4. Ozone is diamagnetic gas
The complex that can exhibit linkage isomerism is:
1. | [Co(NH3)5H2O]Cl3 | 2. | [Co(NH3)5(NO2)]Cl2 |
3. | [Co(NH3)5NO3](NO3)2 | 4. | [CO(NH3)5Cl]SO4 |
1 gram of a carbonate on treatment with excess HCl produces 0.01186 mole of . The molar mass of in g mol–1 is:
1. 84.3
2. 118.6
3. 11.86
4. 1186
Given :
Based on the above thermochemical equations, the value of at 298 K for the reaction
1. 85.2 kJ/mol
2. 15.2 kJ/mol
3. -74.8 kJ/mol
4. 74.8 kJ/mol
The most abundant elements by mass in the body of a healthy human adult are : Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%) ; and Nitrogen (2.6%). The weight which a 75 kg person would gain if all atoms are replaced by atoms is :
1. 37.5 Kg
2. 7.5 Kg
3. 10 Kg
4. 15 Kg
The coagulating power of electrolytes with ions Na+, Al3+, and Ba2+for arsenic sulphide sol increases in the order :
1.
2.
3.
4.
A rubber cord has a cross-sectional area \(1\) mm2 and total unstretched length \(10\) cm. It is stretched to \(12\) cm and then released to project a mass of \(80\) g. The Young's modulus for rubber is \(5\times10^{8}\) N-m2. What would be the velocity of mass when the rubber cord is unstretched?
1. \(5\) m/s
2. \(3\) m/s
3. \(7\) m/s
4. \(2\) m/s
If E be the electric field inside a parallel plate capacitor due to Q and -Q charges on the two plates, then electrostatic force on plate having charge -Q due to the plate having charges +Q will be
1. -QE
2.
3. QE
4.
A coil has 1,000 turns and 500 as its area. The plane of the coil is placed at right angles to a magnetic field of . The coil is rotated through \(180^{0}\) in 0.2 seconds. The average e.m.f. induced in the coil, in milli-volts, is:
1. | 5 | 2. | 10 |
3. | 15 | 4. | 20 |
The displacement (\(Y\)) as a function of position (\(x\)) and time (\(t\)) is given as\(Y= Ae^{(bx+Ct)}\). Which of the following expressions has dimensions different from others?
1. | \(YC\) | 2. | \(AC\) |
3. | \(\frac{C}{b}\) | 4. | \(bC\) |
The binding energies of the atoms of elements A and B are respectively. Three atoms of the element B fuse to give one atom of element A. This fusion process is accompanied by released of energy e. Then are related to each other as
1.
2.
3.
4.
A ray of light falls on a prism ABC (AB=BC) and travels as shown in figure. The refractive index of the prism material should be greater than:
1. | \(4 /{3}\) | 2. | \( \sqrt{2}\) |
3. | \(1.5\) | 4. | \( \sqrt{3}\) |
A particle of charge per unit mass is released from origin with velocity in a uniform magnetic field . If the particle passes through (0, y, 0), then y is equal to
1.
2.
3.
4.
Maximum velocity in SHM is . The average velocity during the motion from one extreme point to the other extreme point will be
1.
2.
3.
4.
A uniform spherical shell gradually shrinks maintaining its shape. The gravitational potential at the centre:
1. increases
2. decreases
3. remains constant
4. oscillates
During inelastic collision between two bodies, which of the following quantities always remain conserved?
1. Total kinetic energy
2. Total mechanical energy
3. Total linear momentum
4. Speed of each body
A man is crossing a river flowing with a velocity of 5 m/s. He reaches a point directly across the river at a distance of 60 m in 5 s. His velocity in still water should be:
1. 12 m/s
2. 13 m/s
3. 5 m/s
4. 10 m/s
A pump ejects 12,000 kg of water at a speed of 4 m/s in 40 s. The average rate at which the pump is working is:
1. 0.24 kW
2. 2.4 W
3. 2.4 kW
4. 24 W
Let and be moments of inertia of a body about two axes, A and B, respectively. The axis A passes through the centre of mass of the body, but B does not. Which of the following is correct?
1. <
2. If <, the axes are parallel.
3. If the axes are parallel, <
4. If the axes are not parallel,
A tank has an orifice near its bottom. The volume of the liquid flowing per second out of the orifice does not depend upon
1. Area of the orifice
2. Height of the liquid level above the orifice
3. Density of liquid
4. Acceleration due to gravity
1 kg of gas does 20 kJ of work and receives 16 kJ of heat when it is expanded between two states. The second kind of expansion can be found between the same initial and final states, which requires a heat input of 9 kJ. The work done by the gas in the second expansion will be:
1. | 32 kJ | 2. | 5 kJ |
3. | -4 kJ | 4. | 13 kJ |
When a negative charge is released and moves in the electric field, it moves towards a position of:
1. | lower electric potential and lower potential energy. |
2. | lower electric potential and higher potential energy. |
3. | higher electric potential and lower potential energy. |
4. | higher electric potential and higher potential energy. |
If the reading of ammeter in figure is 0.75 A, the reading of ammeter will be: [Assume ideal ammeters]
1. 1.5 A
2. 3 A
3. 4.5 A
4. 6 A
A current of i Ampere is flowing through each of the bent wires as shown. The magnitude of the magnetic field at O is-
1.
2.
3.
4.
If an electromagnetic wave of frequency f = 3 MHz passes from vacuum into a dielectric medium with relative permittivity K= 4.0, then:
1. | wavelength is 2 times and frequency becomes half |
2. | wavelength is half and frequency remains unchanged |
3. | wavelength and frequency both remain unchanged |
4. | None of the above |
Two polaroids are kept crossed to each other. Now one of them is rotated through an angle of . The percentage of incident light now transmitted through the system is:
1. 15%
2. 25%
3. 50%
4. 60%
The difference between nth and (n+1)th Bohr's radius of the 'H' atom is equal to its (n - 1)th Bohr's radius.
What is the value of n?
1. 1
2. 2
3. 3
4. 4
In the given transistor circuit, the base current is 35 A. The value of is
1. 100 k
2. 200 k
3. 300 k
4. 400 k
A constant force of 20 N is applied in horizontal direction on system of blocks kept on frictionless surface as shown in the figure. The contact force between 3 kg & 2 kg blocks is and between 2 kg and 5 kg blocks is , then-
1.
2.
3.
4. can't say
A ball is projected at a certain angle with initial velocity u. It covers horizontal range R. With what initial velocity it should be projected keeping the angle of projection the same so that its horizontal range becomes 2.25R?
1. | 2.5u | 2. | 1.5u |
3. | 2.25u | 4. | 0.25u |
A tank is filled with water up to a height h and the pressure at the bottom of the tank is 3P where P is the atmospheric pressure. The height of a point from the bottom of the tank where pressure is is:
1.
2.
3.
4. None of these
A circle of radius 'a' is cut out from a square of uniform density and side '4a'. If initial mass of the square is M, then the centre of mass of the remaining part is- (where O is center of square)
1. to the left of O.
2. to the right of O.
3. to the right of O.
4. to the left of O.
The distance moved by a particle in simple harmonic motion in time where T is the time period of the particle-
1.
2.
3.
4. 3 A
The rms speed of oxygen atoms is v. If the temperature is halved and the oxygen atoms combine to form oxygen molecules, then the rms speed will be:
1.
2.
3. 2v
4.
Hot coffee in a mug cools from \(90^{\circ}\mathrm{C}\) to \(70^{\circ}\mathrm{C}\) in 4.8 minutes. The room temperature is \(20^{\circ}\mathrm{C}\). Applying Newton's law of cooling, the time needed to cool it further by \(10^{\circ}\mathrm{C}\) should be nearly:
1. | 4.2 minute | 2. | 3.8 minute |
3. | 3.2 minute | 4. | 2.4 minute |
A magnetic rod is inside a coil of wire which is connected to an ammeter. If the rod is stationary, which of the following statements is true?
1. | The rod induces a small current. |
2. | The rod loses its magnetic field. |
3. | There is no induced current. |
4. | None of these. |
Three bulbs with individual power ratings of 12 W, 2 W and 6 W respectively are connected as per the circuit diagram below. Find the amount of heat dissipated by each in 10 seconds.
1. 8 J, 1.33 J, 4 J
2. 120 J, 20 J, 60 J
3. 10 J, 0.277 J, 2.5 J
4. 12 J, 1.66 J, 5 J
The direction of the Electric field at point C due to charge q and -2q at points A and B such that C is a point on the perpendicular bisector of AB above line AB and charge q is negative-
If input frequency is 50Hz, then ripple frequency of a half-wave rectifier will be equal to-
1. 100 Hz
2. 50 Hz
3. 25 Hz
4. Data is insufficient
The kinetic energy of a photoelectron emitted on shining light of wavelength m on a metal surface of work function 0.1 eV is-
1. 0.01 eV
2. 0.02 eV
3. 1 eV
4. 0.1 eV
1. \(100\) mA
2. \(200\) mA
3. \(20\) mA
4. \(10\) mA
The position x of a particle moving along the x-axis varies with time t as x = , where x is in meters and t is in seconds. The particle reverses its direction of motion at:
1. x = 40 m
2. x = 10 m
3. x = 20 m
4. x = 30 m
A man of mass \(60\) kg is standing on the ground and holding a string passing over a system of ideal pulleys. A mass of \(10\) kg is hanging over a light pulley such that the system is in equilibrium. The force exerted by the ground on the man is: (\(g=\) acceleration due to gravity)
1. \(20\) g
2. \(45\) g
3. \(40\) g
4. \(60\) g
A ball of mass 2 kg is moving with speed 100 m/s along a straight line making an angle of 60° with normal to a wall. If the collision between ball and wall is perfectly elastic, then the minimum strength of the wall is (time of contact is 0.01 s)
1.
2.
3. 400 N
4.
A mass of 30 g is attached with two springs having spring constant 100 N/m and 200 N/m and other ends of springs are attached to rigid walls as shown in the given figure. The angular frequency of oscillation will be
1.
2.
3. 100 rad/s
4. 200 rad/s
Two Carnot engines x and y are working between the same source temperature \(T_1\) and the same sink temperature \(T_2\). If the temperature of the source in Carnot engine x is increased by \(\Delta T\), and in the Carnot engine y, the temperature of the sink is increased by\(\Delta T\), then the efficiency of x and y becomes \(\eta_\mathrm x\) and\(\eta_\mathrm y\). Then:
1. | \(\eta_{\mathrm{x}}=\eta_{\mathrm{y}}\) |
2. | \(\eta_{\mathrm{x}}<\eta_{\mathrm{y}}\) |
3. | \(\eta_{\mathrm{x}}>\eta_{\mathrm{y}}\) |
4. | The relation between \(\eta_{\mathrm{x}}\) and \(\eta_{\mathrm{y}}\) depends on the nature of the working substance |
A solid sphere is rolling without slipping such that the velocity of its centre of mass is v. Ratio of speeds of horizontal extreme points A and B is
1. 1:1
2. :1
3. 2:1
4. 1:
The equivalent capacitance between points a and b in the network shown below is:
1. 5C
2. 4C
3. 3C
4. 2C
Light waves of intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between the waves at a point P is and at other point Q. Then the ratio of intensities at P and Q is
1. 8:5
2. 1:4
3. 5:8
4. 9:1
When an object is placed at 10 cm and 30 cm from a convex lens, images obtained are of the same magnitude of magnification. The focal length of the lens maybe
1. 10 cm
2. 15 cm
3. 20 cm
4. 25 cm
When a magnetic material is subjected to a very small magnetizing force H, the intensity of magnetization is proportional to
1.
2.
3. H
4.