InterviewSolution
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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.
| 901. |
The number of moles of `KMnO_(4)` that will be needed to react with one mole of sulphite ion in acidic solution isA. 1B. `(3)/(5)`C. `(4)/(5)`D. `(2)/(5)` |
| Answer» Correct Answer - D | |
| 902. |
Mg is present in :A. ChloroCHElB. HaemoglobinC. Vitamin-12D. Vitamin-B |
| Answer» Correct Answer - A | |
| 903. |
Which ion is colourless:A. `Cr(+4)`B. `Sc^(+3)`C. `Ti^(+3)`D. `V^(+3)` |
| Answer» Correct Answer - B | |
| 904. |
Equilibrium constant Kp for following reaction: `MgCO_(3) (s) hArr MgO(s) + CO_(2) (g)`A. `Kp = P_(CO_(2))`B. `Kp = P_(CO_(2)) xx (P_(C_(2)) xx P_(MgO))/(P_(MgCO_(3))`C. `Kp= (P_(CO_(3)) + P_(MgO))/(P_(MgCO_(3)))`D. `Kp = (P_(MgCO_(3)))/(P_(CO_(2)) xx P_(MgO))` |
| Answer» Correct Answer - A | |
| 905. |
A compound formed by elements `X` and `Y` crystallises in a cubic structure in which the `X` atoms are at the corners of a cube and the `Y` atoms are at the face centres.The formula of the compound isA. `X_3Y`B. XYC. `XY_2`D. `XY_3` |
| Answer» Correct Answer - D | |
| 906. |
Isoelectronic species are:A. `CO,CN^(-),NO^(+),C_(2)^(-2)`B. `CO^(-),CN,NO,C_(2)^(-)`C. `CO^(-),CN^(+),NO,C_(2)`D. `CO,CN,NO,C_(2)` |
| Answer» Correct Answer - A | |
| 907. |
Correct order of dissociation energy of `N_(2)` and `N_(2)^(+)` is:A. `N_(2) gt N_(2)^(+)`B. `N_(2) = N_(2)^(+)`C. `N_(2)^(+) gt N_(2)`D. None |
| Answer» Correct Answer - A | |
| 908. |
Shape of `Fe(CO)_(5)` isA. OctahedralB. Square planarC. Trigonal bipyramidalD. Square pyramidal |
| Answer» Correct Answer - C | |
| 909. |
Which compound form linear polymer due to H-bondA. `H_(2)O`B. `NH_(3)`C. `Hbr`D. `HCI` |
| Answer» Correct Answer - B | |
| 910. |
Which statement is wrong:A. Bond energy of `F_(2) gt CI_(2)`B. Electronegatively of `F gt CI`C. F is more oxidising than CID. Electron affinity of `CI gt F` |
| Answer» Correct Answer - A | |
| 911. |
`d pi = p pi` bond present in:A. `CO_(3)^(2)`B. `CO_(4)^(3)`C. `NO_(3)`D. `NO_(2)^(-)` |
| Answer» Correct Answer - B | |
| 912. |
The concentration of `ZnCl_(2)` solution will change when it is placed in a container which is made of :A. AIB. CuC. AgD. None |
| Answer» Correct Answer - A | |
| 913. |
In which of the following is the hydration energy higher than the lattice energy?A. `SrSO_(4)`B. `BaSO_(4)`C. `MgSO_(4)`D. `RaSO_(4)` |
| Answer» Correct Answer - C | |
| 914. |
Which one of the following ionic species has the greatest proton affinity to form stable compound ?A. `I^(-)`B. `HS^(-)`C. `NH_(2)^(-)`D. `F^(-)` |
| Answer» Correct Answer - C | |
| 915. |
If identical charges `(-q)` are placed at each corner of a cube of side `b`, then electric potential energy of charge `(+q)` which is palced at centre of the cube will beA. `(-4sqrt2q^2)/(piepsilon_0b)`B. `(-8sqrt2q^2)/(piepsilon_0b)`C. `(-4q^2)/(sqrt3piepsilon_0b)`D. `(8sqrt2q^2)/(4piepsilon_0b)` |
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Answer» Correct Answer - C `E.P.E=8[1/(4piepsilon_0)((q)(-q))/((sqrt3b//2))]=(-4q^2)/(sqrt3piepsilon_0b)` |
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| 916. |
A capacity of capacity `C_(1)` is charged up to `V` volt and then connected to an uncharged capacitor of capacity `C_(2)`. Then final potential difference across each will beA. `(C_2V)/(C_1+C_2)`B. `(C_1V)/(C_1+C_2)`C. `(1+C_2/C_1)`D. `(1-C_2/C_1)V` |
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Answer» Correct Answer - B `V_"common"=(C_1V_1+C_2V_2)/(C_1+C_2)=(because V_2=0)` `rArr V_"common"=(C_1V)/(C_1+C_2)` |
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| 917. |
For a cell terminal potential difference is 2.2 V when circuit is open and reduces to 1.8V when cell is connected to a resistance of R=`5Omega` then determine internal resistance of cell is:-A. `10/9Omega`B. `9/10Omega`C. `11/9Omega`D. `5/9Omega` |
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Answer» Correct Answer - A T.P.D (V)=E-Ir (Remember it) V=E-`(E/(R+r))r="ER"/"(R+r)"` from given conditions E=2.2 & when R=5 then TPD V =1.8 V therefore 1.8=`(2.2xx5)/(5+r) rArr r=10/9 Omega` |
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| 918. |
Some charge is being given to a conductor. Then its potential : -A. Is maximum at surfaceB. Is maximum at centreC. Is remain same throughout the conductorD. Is maximum somewhere between surface and centre |
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Answer» Correct Answer - C Inside the conductor E =0 so potential remains same |
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| 919. |
250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then the load is lifted to 3m, the efficiency of pulley system will be : -A. `25%`B. `33.3%`C. `75%`D. `90%` |
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Answer» Correct Answer - C `eta="useful work"/"total work"="mgh"/"F x d"=((75g )xx3)/(250xx12)=0.75` |
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| 920. |
The interplaner distance in a crystal is `2.8 xx 10^(–8)` m. The value of maximum wavelength which can be diffracted : -A. `2.8 xx 10^(–8)` mB. `5.6 xx 10^(–8)` mC. `1.4 xx 10^(–8)` mD. `7.6 xx 10^(–8)` m |
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Answer» Correct Answer - B `2dsin theta=nlambda because -1 le sin theta le 1` Therefore `lambda_"max"=2d rArr lambda_"max"=2xx2.8xx10^(-8)m` `rArr lambda_"max"=5.6xx10^(-8)m` |
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| 921. |
In a common-base configuration of a transistor `(Delta i)/(Delta i_(e)) = 0.98`, then current gain in common emitter configuration of transistor will beA. 49B. 98C. 4.9D. 25.5 |
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Answer» Correct Answer - A `I_C/I_E=alpha=0.98 , I_C/I_B=beta=alpha/(1-alpha)=49` |
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| 922. |
In an inductor of self-inductance L=2 mH, current changes with time according to relation `i=t^(2)e^(-t)`. At what time emf is zero ?A. 2sB. 1sC. 4sD. 3s |
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Answer» Correct Answer - A `I=t^2e^(-t)` `e=L"dl"/"dt"` here emf is zero when `"dl"/"dt"=0` `"dl"/"dt"=2te^(-tau)-t^2 e^(-tau)=0` `rArr te^(-tau) (t-2) = 0 rArr t =2` sec |
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| 923. |
If specific resistance of a potentiometer wire is `10^(–7 ) Omega m`, the current flow through it is `0.1 A` and the cross-sectional area of wire is `10^(–6) m^(2)` then potential gradient will beA. `10^(-2)` V/mB. `10^(-4)` V/mC. `10^(-6)` V/mD. `10^(-8)` V/m |
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Answer» Correct Answer - A Solve by `x=I_rho/A` |
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| 924. |
A particle of mass m is tied to a string of length L and whirled into a horizontal plan. If tension in the string is T then the speed of the particle will be :A. `sqrt((Tl)/m)`B. `sqrt((2Tl)/(m))`C. `sqrt((3Tl)/m)`D. `sqrt((T)/(ml))` |
| Answer» Correct Answer - A | |
| 925. |
If `X = 3 - 4t^(2) + t^(3)`, then work done in first 4s. will be (Mass of the particle is 3 gram) :A. 384 mJB. 168 mJC. 192 mJD. None of these |
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Answer» Correct Answer - A Work energy theorem `W = DeltaKE` `x=3-4t^(2)+t^(3)` `v=(dx)/(dt)=-8t+3t^(2)` `v_(1)(t=0)=0` `v_(2)(t=4)=16` Therefore,`DeltaKE=1/2mv_(2)^(2)-1/2mv_(1)^(2)` =`1/2xx3xx10^(-3)xx16xx16-0=384mJ` |
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| 926. |
Half-lives of two radioactive substances `A` and `B` are respectively `20` minutes and `40` minutes. Initially, he sample of `A` and `B` have equal number of nuclei. After `80` minutes the ratio of the remaining number of `A` and `B` nuclei is :A. `4 : 1`B. `1 : 2`C. `8 : 1`D. `16 : 1` |
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Answer» Correct Answer - A `T_(1//2(A))= 40min, T_(1//2(B))= 20 min` t = 80 min `n_(A) = t/T_(1//2(A))=80/40 = 2` `n_(B) = t/T_(1//2(B))=80/20 = 4` `N_(A)/N_(B)=(N_(0)//2^(2))/(N_(0)//2^(4))=16/4 = 4 : 1` |
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| 927. |
If force F=500-100t, then function of impulse with time will be,-A. `500t-50t^(2)`B. 50t – 10C. `50 – t_(2)`D. `100t^(2)` |
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Answer» Correct Answer - A `because F = (dP)/(dt) implies Fdt = dp` `DeltaP = Impulse = int_(0)^(t)Fdt =int_(0)^(t)(500-100t)dt` = `500t-50t^(2)` |
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| 928. |
Zine can be coated on iron to produce galvanize3d iron but the reverse is not possible it is becauseA. zinc is ligher than ironB. zinc has lower melting point than ironC. zinc has lower negative electrode potential than ironD. zinc has higher negative electrode potential than iron |
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Answer» Correct Answer - D Theory based. |
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| 929. |
The activation energy for a simple chemical reaction `A rarr B` is `E_(a)` in the forward reaction: The activation of the reverse reactionA. Is negative of `E_a`B. Is always less than `E_a`C. Can be less than or more than `E_a`D. Is always double of `E_a`. |
| Answer» Correct Answer - C | |
| 930. |
Which of the following statements is not true :A. Among halide ions, iodide is the most powerful reducing agentB. Fluorine is the only halogen that does not show a variable oxidation stateC. HOCl is a stronger acid than HOBrD. HF is a stronger acid than HCl |
| Answer» Correct Answer - D | |
| 931. |
The method of zone refining of metals is based on the principle of :A. Greater mobility of the pure metal than that of the impurityB. Higher melting point of the impurity than that of the pure metalC. Greater noble character of the solid metal than that of the impurityD. Greater solubility of the impurity in the molten state than in the solid |
| Answer» Correct Answer - D | |
| 932. |
Maximum photosynthesis takes place by :A. PhytoplanktonB. ZooplanktonC. Marsh plantsD. Woody plants |
| Answer» Correct Answer - A | |
| 933. |
Which one is wrong pair `:-`A. Scurvy – Vitamin CB. Rickets – Vitamin DC. Night blindness (Xerophthalmia) – Vitamin AD. Beriberi – Vitamin K |
| Answer» Correct Answer - D | |
| 934. |
Pantothenic acid & Biotin associated withA. Vitamin DB. Vitamin B complexC. Vitamin KD. Vitamin E |
| Answer» Correct Answer - B | |
| 935. |
Azolla is used in the cultivation of :A. MaizeB. SorghumC. WheatD. Rice |
| Answer» Correct Answer - D | |
| 936. |
Which of the following is used to manufacture ethanol from starchA. PenicillineB. SaccharomyesC. AzotobactorD. lactobacillus |
| Answer» Correct Answer - B | |
| 937. |
Which of the following yields citric acid :A. Penicillium citricumB. Aspergillus nigerC. SaccharomycesD. Azospirilium |
| Answer» Correct Answer - B | |
| 938. |
While performing cathode ray experiments, it was observed that there was no passage of electric current under normal conditions. Which of the following can account for thisobservation ?(a) Dust particles are present in air(b) Carbon dioxide is present in airAir is a poor conductor of electricity under normalconditions(d) None of the above |
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Answer» Air is a poor conductor of electricity under normal conditions |
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| 939. |
In which of the following pairs are both the ions coloured in aqueous solution-A. ` Ni^(2+), Ti^(3+) `B. `Sc^(3+),Ti^(3+)`C. `Sc^(3+), Co^(2+)`D. `Ni^(2+), Cu^(+)` |
| Answer» Correct Answer - A | |
| 940. |
`CH_(3)-CHCl-CH-CH_(3)` has a chiral centre. Which one of the following represent its `R`-configuration?A. `H-underset(C_(2)H_(5))underset(|)overset(CH_(3))overset(|)C-Cl`B. `H_(3)C-underset(H)underset(|)overset(C_(2)H_(5))overset(|)(C)-Cl`C. `H-underset(Cl)underset(|)overset(C_(2)H_(5))overset(|)C-CH_(3)`D. `Cl-underset(H)underset(|)overset(C_(2)H_(5))overset(|)C-CH_(3)` |
| Answer» Correct Answer - D | |
| 941. |
The formula for exponential population growth isA. dt/dN = rNB. dN/rN = dtC. rN/dN = dtD. dN/dt = rN |
| Answer» Correct Answer - D | |
| 942. |
Which one of the following organisms is correctly matched with its three characteristicsA. Tomato : Twisted aestivation, Axile placentation, BerryB. Onion : Bulb, Imbricate aestivation, Axile placentationC. Maize : `C_(3)` pathway, Closed vascular bundles, ScutellumD. Pea : `C_(3)` pathway, Endospermic seed, Vaxillary aestivation |
| Answer» Correct Answer - B | |
| 943. |
What is it that forms the basis of DNA FingerprintingA. The relative difference in the DNA occurrence in blood, skin and salivaB. The relative amount of DNA in the ridges and grooves of the fingerprintsC. Satellite DNA occurring as highly repeated short DNA segmentsD. The relative proportions of purines and pyrimidines in DNA |
| Answer» Correct Answer - C | |
| 944. |
The first clinical gene therapy was given for treating :A. Chicken poxB. Rheumatoid arthritisC. Adenosine deaminase deficiencyD. Diabetes mellitus |
| Answer» Correct Answer - C | |
| 945. |
Cycas and Adiantum resemble each other in havingA. CambiumB. VesselsC. SeedsD. Motile sperms |
| Answer» Correct Answer - D | |
| 946. |
A thermocouple of negligible resistance produces an emf fo `40 mu V//^(@)C` in the linear range of temperature. A galvanometer of resistance `10 Omega` whose sensitivity is `1 mu A//div` is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system willA. `0.25^(@)C`B. `0.5^(@)C`C. `1^(@)C`D. `0.1^(@)C` |
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Answer» Correct Answer - A For minimum deflection of 1 division required current `=muA` `implies " voltage required "=IR=(1muA)(10)=10muV` `therefore40muV-=1^@C` `implies10muV-=1/4""^(@)C=0.25^@C` |
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| 947. |
Structure of (monomer unit of) natural rubber is:A. `CH_3-undersetoverset(|)(CH_3)C=CH-CH_3`B. `CH_3 –CH=CH–CH_3`C. `CH_2=undersetoverset(|)(CH_3)C-CH=CH_2`D. `CH_2=undersetoverset(|)(CH_3)C-undersetoverset(|)(CH_3)C=CH_2` |
| Answer» Correct Answer - C | |
| 948. |
Cynohydrin of the following compound on hydrolysis gives optically active product :A. HCHOB. `CH_3CHO`C. `CH_3COCH_3`D. All of the above |
| Answer» Correct Answer - B | |
| 949. |
Which of the following is a chiral compound :A. 2-methyl pentanoic acidB. 3-methyl pentanoic acidC. 4-methyl pentanoic acidD. None of these |
| Answer» Correct Answer - A::B | |
| 950. |
The animals with bilateral symmetry in young stage and radial pentamerous symmetry in the adult stage, belong to the phylum -A. MolluscaB. CnidariaC. EchinodermataD. Annelida |
| Answer» Correct Answer - C | |