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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which one of the following techniques made it possible to gnetically engineer living organisms ?A. HybridizationB. Recombinant DNA techniquesC. X-ray diffractionD. Heavier isotope labeling |
| Answer» Correct Answer - B | |
| 52. |
Select the correct statement with respect to diseases and immunisationA. Injection of snake antivenom against snake bite is an example of active immunisation.B. If due to some reason B-and T-lymphocytes are damaged, the body will not produce antibodies against a pathogen.C. Injection of dead/inactivated pathogens causes passive immunityD. Certain protozoans have been used to mass produces hepatitis B vaccine |
| Answer» Correct Answer - B | |
| 53. |
Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein:A. does not kill the carrier bacterium which is itself resistant to this toxinB. binds with epithelial cells of midgut of the insect pest ultimately killing itC. is coded by several genes including the gene cryD. is activated by acid pH of the foregut of the insect pest. |
| Answer» Correct Answer - B | |
| 54. |
If `E_(Fe^(2+))^(@)//Fe = -0.441 V` and `E_(Fe^(3+))^(@)//Fe^(2+) = 0.771 V` The standard `EMF` of the reaction `Fe+2Fe^(3+) rarr 3Fe^(2+)` will be:A. 0.330 VB. 1.653 VC. 1.212 VD. 0.111 V |
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Answer» Correct Answer - C For the cell reaction `Fe+2Fe^(3+)to3Fe^(2+)` Anode reaction is `Fe to Fe^(2+)+2e^(-)` Cathode reaction is `2Fe^(3+)+2e to 2Fe^(2+)` `E_(cell)^(@)=E_(Cathode)^(@)-E_(Anode)^(@)(E^(@)"is reduction potential")`ltbrge0.771-(-0.441) `E_(Cell)^(@)=1.212 V` |
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| 55. |
The measurement of the electron position is associated with an uncertainty in momentum, which is equal to `1 xx 10^-18 g cm s^-1`. The uncertainty in electron velocity is (mass of an electron is `9 xx 10^-28 g`)A. `1xx10^(5)"cm s"^(-1)`B. `1xx10^(11)"cm s"^(-1)`C. `1xx10^(9)"cm s"^(-1)`D. `1xx10^(6)"cm s"^(-1)` |
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Answer» Correct Answer - C Uncertainty in momentum `(mDelta upsilon)=1xx10^(18)"g cm s"^(-1)` Uncertainty in velocity `(Delta upsilon)=(1xx10^(-18))/(9xx10^(-28))=1.1xx10^(9)"cm s"^(-1)` |
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| 56. |
Percentage of free space in cubic in a body- centred cubic unit cell is .A. `34%`B. `28%`C. `30%`D. `32%` |
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Answer» Correct Answer - D For body centered cubic structure, packing fraction = `0.68`, i.e., `68%` of the unit cell is occupied by atoms and `32%` is empty. |
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| 57. |
Angular shape of ozone molecule consists ofA. 1 sigma and 1 pi bondsB. 2 sigma and 1 pi bondsC. 1 sigma and 2 pi bondsD. 2 sigma and 2 pi bonds |
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Answer» Correct Answer - B The angular shape of ozone molecule consists of 2 sigma and 1 pi-bond. |
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| 58. |
In a gaseous mixture which of `NO_2, CO_2` and `N_2O` gases have same rate of diffusionA. `NO_2, CO_2`B. `CO_2, N_2O`C. `NO_2, N_2O`D. All |
| Answer» Correct Answer - B | |
| 59. |
Which of the following would have permanent dipple moment ?A. `BF_(3)`B. `SF_(4)`C. `SiF_(4)`D. `XeF_(4)` |
| Answer» Correct Answer - B | |
| 60. |
The surface tension of which of the following liquid is maximum?A. `C_(6)H_(6)`B. `H_(2)O`C. `C_(2)H_(5)OH`D. `CH_(3)OH` |
| Answer» Correct Answer - B | |
| 61. |
The energy of second Bohr orbit of the hydrogen atom is `- 328 k J mol^-1`, hence the energy of fourth Bohr orbit would be.A. `-1312 kJ "mol"^(-1)`B. `-82 kJ "mol"^(-1)`C. `-41 kJ "mol"^(-1)`D. `-164 kJ "mol"^(-1)` |
| Answer» Correct Answer - B | |
| 62. |
Which one of the following is not a method of in situ conservation of biodiversity ?A. Sacred GroveB. Biosphere ReserveC. Wildlife SanctuaryD. Botanical Garden |
| Answer» Correct Answer - D | |
| 63. |
Which part of the brain is responsible for thermoregulation?A. Medulla oblongataB. CerebrumC. HypothalamusD. Corpus callosum |
| Answer» Correct Answer - C | |
| 64. |
Match Column -1 with with Column - II. `{:("Column-I",,"Column-II"),("(a) Seprophyte",,"(i) Symbiotic association of fungi with plant roots"),("(b) Parasite",,"(ii) Decomposition of dead organic meterials"),("(c) Lichens",,"(iii) Living on living plants or animals"),("(d) Mycorrhiza",,"(iv) Symbiotic assiciation of algae and fungi"):}` Choose the correct answer from the options given below:A. `{:(,(a),(b),(c),(d)),((1),(ii),(iii),(iv),"(i)"):}`B. `{:(,(a),(b),(c),(d)),((2),(i),(ii),(iii),"(iv)"):}`C. `{:(,(a),(b),(c),(d)),((3),(iii),(ii),(i),"(iv)"):}`D. `{:(,(a),(b),(c),(d)),((4),(ii),(i),(iii),"(iv)"):}` |
| Answer» Correct Answer - A | |
| 65. |
How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to `CO_(2)` and `H_(2)O` yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcalA. TwoB. ThirtyC. Fifty-sevenD. One |
| Answer» Correct Answer - C | |
| 66. |
Moss peat is used as a packing material for sending flowers and live plants to distant places becauseA. It is easily availableB. It is hygroscopicC. It reduces transpirationD. It serves as a disinfectant |
| Answer» Correct Answer - B | |
| 67. |
Variations in proteins are due toA. Sequence of amino acidsB. Number of amino acidsC. R–groupD. None |
| Answer» Correct Answer - A | |
| 68. |
Which one of the following is considered important in the development of seed habit Or Seloginella has the character of evolutionary importance. That character is |
| Answer» Correct Answer - 3 | |
| 69. |
Which of the following yield maximum energyA. By glycolysis in a sprinterB. Aerobic respiration in germinating seedsC. Fermentation by yeastD. Anaerobic respiration |
| Answer» Correct Answer - B | |
| 70. |
Insectivorous plants grow in soil which is deficient in:A. MgB. CaC. PD. N |
| Answer» Correct Answer - D | |
| 71. |
Main reason of water bloom in rivers, lakes, sea etc. is:A. Brown algae and green algaeB. Cyanobacteria and dinoflagellatesC. EicchorniaD. Fishes |
| Answer» Correct Answer - B | |
| 72. |
The value of coefficient of volume expansion of glycerin is `5 xx 10^(-4) K^(-1)`. The fractional change in the density of glycerin for a rise of `40^(@)C` in its temperature isA. 0.01B. 0.015C. 0.02D. 0.025 |
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Answer» Correct Answer - C `rho=rho_(0)(1+YDeltaT)` `rho-rho_(0)=rho_(0)YDeltaT` fraction change `(rho-rho_(0))/(rho_(0))=YDeltaT=5xx10^(-4)xx40` `=200xx10^(-4)=0.020` |
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| 73. |
Consider the following four statement (1-4) and select the option which includes all the correct ones only (1) Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc (2) Body weight-wise the microorganism Methylophilus methylotrophus may be able to produce several times more proteins then the cows pe day (3) Common button mushrooms are a very rich source of vitamin C (4) A rich variety has been developed which is very rich in calciumA. Statements (a), (c) and (d)B. Statements (b), (c) and (d)C. Statements (a), (b)D. Statements (c), (d) |
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Answer» Correct Answer - C Statement (a) - Spirullina is source of single cell protein rich in protein, minerals and vitamins. Methylophilous methylotrophus produce 25 tons of proteins in same period of time by which of cow produce 200 gm. of protein. |
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| 74. |
Polysome is formed byA. a ribosome with several subunitsB. ribosomes attached to each other in a linear arrangementC. several ribosomes attached to a single mRNAD. many ribosomes attached to a strand of endoplasmic reticulum |
| Answer» Correct Answer - C | |
| 75. |
Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid ?A. AUG, ACG — Start/MethionineB. UUA, UCA — LeucineC. GUU, GCU — AlanineD. UAG, UGA — Stop |
| Answer» Correct Answer - D | |
| 76. |
Which is expressing right appropriate pairing:A. Brassicaceae - SunflowerB. Malvaccae - CottonC. Papilionaceae - CatechuD. Liliaceae - Wheat |
| Answer» Correct Answer - B | |
| 77. |
Enzymes not found in:A. FungiB. AlgaeC. VirusD. Cyanobacteria |
| Answer» Correct Answer - C | |
| 78. |
Which of the following two statements are correct ? (i) Medical termination of pregnancy (MTP) during first trimester is generally safe (ii) Generally chances of conception are nil until mother breast-feeds the infant upto two years (iii) Intrauterine devices like copper-T are effective contraceptives (iv) Contraception pills may be taken upto one week after coutus to prevent conception.A. (i), (iii)B. (i), (ii)C. (ii), (iii)D. (iii), (iv) |
| Answer» Correct Answer - A | |
| 79. |
Which of the following is expected to have the highest value `(gm//m^(2)//yr)` in a grassland ecosystem?A. Tertiary productionB. Gross production (GP)C. Net production (NP)D. Secondary production |
| Answer» Correct Answer - B | |
| 80. |
2.5 litre of 1 M NaOH solution are mixed with another 3 litre of 0.5 M NaOH solution Then the molarity of the resultingA. 0.80 MB. 1.0 MC. 0.73 MD. 0.50 M |
| Answer» Correct Answer - C | |
| 81. |
If molarity of the dilute solutions is doubled ,the value of molal depression constant`(K_(f))`will be:A. DoubledB. HalvedC. TripledD. Unchanged |
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Answer» Correct Answer - D `K_(f)` (molal depression constant) is a characteristic of solvent and is independent of molality. |
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| 82. |
In the following sequence of reaction `CH_(3)-Br overset(KCN)rarrA overset(H_(3)O+)rarrBunderset(Ether)overset(LiAIH_(4))rarrC` the end product is .A. AcetaldehydeB. Ethyl alcoholC. AcetoneD. Methane |
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Answer» Correct Answer - B `CH_(3)-Br overset(KCN)to CH_(3)-CN overset(H_(2)O^(+))to CH_(3)CO OH overset(LiAlH_(4))to CH_(3)CH_(2)OH` |
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| 83. |
An ideal spring with spring constant k is hung from the ceiling and a block of mass M is attached to its lower end. The mass is released with the spring initially unstretched. Then the maximum extension in the spring isA. Mg/2kB. Mg/kC. 2 Mg/kD. 4 Mg/k |
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Answer» Correct Answer - C Loss in grav. PE= gain in spring PE At maximum elongation `Mgx=(1)/(2)kx^(2)` `x=(2Mg)/(k)` |
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| 84. |
The cations and anions are arranged n alternate form in:A. Metallic crystalB. Ionic crystalC. C-valent crystalD. Semi-conductor crystal |
| Answer» Correct Answer - B | |
| 85. |
A patient is advised to specially consume more meat ,lentil ,milk and eggs in diet when the patient suffers fromA. AnemiaB. ScurvyC. KwashiorkorD. Rickets |
| Answer» Correct Answer - C | |
| 86. |
Liquid hydrocarbon can be converted to a mixture of gaswous hydrocarbon byA. OxidationB. CrackingC. Distillation under reduced pressureD. Hydrolysis |
| Answer» Correct Answer - B | |
| 87. |
Hydrocarbon`(A)` reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms `(A)` isA. `CH_(3)-CH_(3)`B. `CH_(2)=CH_(2)`C. `CH-=CH`D. `CH_(4)` |
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Answer» Correct Answer - D `underset((A))(CH_(4))overset(Br_(2)//hv)to underset(CH_(3)-CH_(3)" ")underset({:darr{:("Na/dry ether"),("Wurtz reation"):}:})(CH_(3)Br"")` Hence the correct option is (4) |
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| 88. |
The number of electrons delivered at the cathode during electrolysis by a current of `1` ampere in 60 seconds is (charger on electron `= 1.60 xx 10^(-19)C`)A. `6xx10^(23)`B. `6xx10^(20)`C. `3.75xx10^(20)`D. `7.48xx10^(23)` |
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Answer» Correct Answer - C `Q=n e` `Ixxt=n e` `n=(1xx60)/(1.6xx10^(-19))` `n=3.75xx10^(20)` |
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| 89. |
Which of following give positive Fehling solution testA. SucroseB. GlucoseC. FatsD. Protein |
| Answer» Correct Answer - B | |
| 90. |
The intermediates formed during the reaction of `R-overset(O)overset(||)C-NH_(2)` with `Br_(2)` and KOH are :A. RCONHBr and RNCOB. RNHCOBr and RNCOC. RNH-Br and RCONHBrD. `RCONBr_2` |
| Answer» Correct Answer - A | |
| 91. |
Which of the following is incorrect : -A. `FeCl_3` is used in detection of phenolB. Fehling solution is used in detection of glucoseC. Tollen reagent is used in detection of unsaturationD. `NaHSO_3` is used in detection of carbonyl compound |
| Answer» Correct Answer - C | |
| 92. |
An organic compound `A(C_(4)H_(6)CI)` on reation withNa/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative `A` is .A. t-butyl chlorideB. sec. butyl chlorideC. Iso butyl chlorideD. n-butyl chloride |
| Answer» Correct Answer - A | |
| 93. |
The main axis of diatomic molecule is `z`. The orbitals `p_x` and `p_y` overlap to formA. `pi` molecular orbtialB. `sigma` molecular orbtialC. `delta` molecular orbtialD. No bond will form |
| Answer» Correct Answer - A | |
| 94. |
In X - H----Y , both X and Y are electronegative elementsA. Electro density on X will increase and on H will decreaseB. In both electron density will increaseC. In both electron density will decreaseD. On X electron density will decrease and on H increases |
| Answer» Correct Answer - A | |
| 95. |
Which statement is incorrect : -A. `Ni(CO)_4`-Tetrahedral, paramagneticB. `Ni(CN)_4^(-2)`-Square planar, diamagneticC. `Ni(CO)_4`-Tetrahedral, diamagneticD. `[Ni(Cl)_4]^(-2)`-Tetrahedral, paramagnetic |
| Answer» Correct Answer - A | |
| 96. |
Which of the following organometallic compound is a sigma and pi bonded? .A. `[Fe(eta^5-C_5H_5)_2]`B. `K[PtCl_3(eta^2-C_2H_4)]`C. `[Co(CO)_5NH_3]^(+2)`D. `Fe(CH_3)_3` |
| Answer» Correct Answer - C | |
| 97. |
The values of `DeltaH` and `DeltaS` for the reaction `C("graphite")+CO_(2)(g)to2CO(g)` are `170 kJ` and `170 JK^(-1)` respectively. The reaction will be spontaneous atA. 510 KB. 170KC. 910KD. 1110K |
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Answer» Correct Answer - D For a spontaneous reaction `DeltaG=-ve ` Or ar eq. `DeltaG=0` `Delta H=T DeltaS ` `T=(DeltaH)/(DeltaS)` `=(170xx10^(3))/(170)` `=1000K` |
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| 98. |
Change in enthalpy for reaction `2H_(2)O_(2)(l)rarr2H_(2)O(l)+O_(2)(g)` if heat of formation of `H_(2)O_(2)(l)` and `H_(2)O(l)` are `-188` and `-286KJ//mol` respectively isA. `– 196 KJ//mol`B. `+ 196 KJ//mol`C. `+ 948 KJ//mol`D. `– 948 KJ//mol` |
| Answer» Correct Answer - A | |
| 99. |
Match the following genes of the Lac operon with their respective products `{:((a),"i gene",(i),beta-"galactosidase"),((b),"z gene",(ii),"Permease"),((c),"a gene",(iii),"Repressor"),((d),"y gene",(iv),"Transacetylase"):}` Select the correct option.A. `{:(,(a),(b),(c),(d)),((1),(iii),(iv),(i),"(ii)"):}`B. `{:(,(a),(b),(c),(d)),((2),(i),(iii),(ii),"(iv)"):}`C. `{:(,(a),(b),(c),(d)),((3),(iii),(i),(ii),"(iv)"):}`D. `{:(,(a),(b),(c),(d)),((4),(iii),(i),(iv),"(ii)"):}` |
| Answer» Correct Answer - D | |
| 100. |
Assume each reaction is carried out in an open container. For which reaction will `DeltaH` = `DeltaE` ?A. `H_(2)(g) + Br_(2)(g) → 2HBr(g)`B. `C(s) + 2H_(2)O(g) → 2H_(2)(g) + CO_(2)(g)`C. `PCl_(5)(g)→ PCl_(3)(g) + Cl_(2)(g)`D. `2CO(g)+O_(2)(g)to2CO_(2)(g)` |
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Answer» Correct Answer - A For `H_(2)(g)+Br_(2)(g)to 2HBr(g)` `thereforeDeltan_(g)=0 thereforeDeltaH=DeltaE+Deltan_(g) RT impliesDeltaH=DeltaE` |
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