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.
| 251. |
`._(n)X^(m)` emitted one `alpha` and `2beta` particles, then it will become :A. `._(n)X^(m-4)`B. `._(n-1)X^(m-1)`C. `._(n)Z^(m-4)`D. None |
| Answer» Correct Answer - A | |
| 252. |
When `Xto._(7)N^(14)+2beta^(-)` then number of neutron will be in X :A. 3B. 5C. 7D. 9 |
| Answer» Correct Answer - D | |
| 253. |
Which can be oxidized to the corresponding carbonyl compound?A. o-NitrophenolB. PhenolC. 2-methyl-2-hydroxy propaneD. 2-hydroxy propane |
| Answer» Correct Answer - D | |
| 254. |
In an octahedral structure , the pair of d orbitals involved in `d^(2)sp^(2)` hybridization isA. `d_"xz", d_(x^2-y^2)`B. `d_z^2, d_"xz"`C. `d_"xy",d_"yz"`D. `d_(x^2-y^2), d_z^2` |
| Answer» Correct Answer - D | |
| 255. |
Which of the following is not a correct statement:-A. The electron-deficient molecules can act as Lewis acids (B. The canonical structures have no real existenceC. Every AB5 molecule does infact have square pyramid structureD. Multiple bonds are always shorter than corresponding single bonds |
| Answer» Correct Answer - C | |
| 256. |
Which one of the following orders is not in according with the property stated against it ?A. `F_(2)gtCl_(2)gtBr_(2)gtI_(2)`, oxidising powerB. HI gt HBr gt HCl gt HF, acidic property in waterC. ` F_(2) gt Cl_(2) gt Br_(2) gt I_(2)` , ElectronegativityD. ` F_(2) gt Cl_(2) gt Br_(2) gt I_(2)` , Bond dissociation energy |
| Answer» Correct Answer - D | |
| 257. |
A parallel plate capacitor 20 `muF` is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively:A. zero,zeroB. zero, `60 muA`C. `60 muA, 60muA`D. `60 muA`, zero |
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Answer» Correct Answer - C `Q=CV` `(dQ)/(dt)=i=C(dv)/(dt)` `=20 muFxx(3V)/(s)` `=60 muA` For circuit to be completed displacement current should be equal to conduction current. |
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| 258. |
Hydrocarbons are formed when aldehydes and ketones are reduced with amalgamated zinc and conc. HCI. The reaction is called:A. Wolff-Kishner ReductionB. Clemmensen ReductionC. Cope ReductionD. Dow Reduction |
| Answer» Correct Answer - B | |
| 259. |
The correct decreasing order of their reactivity towards hydrolysis is A. `(ii) gt (iv) gt (i) gt (iii) `B. `(ii) gt (iv) gt (iii) gt (i)`C. `(i) gt (ii) gt (iii) gt (iv) `D. `(iv) gt (ii) gt (i) gt (iii)` |
| Answer» Correct Answer - A | |
| 260. |
Which one of following on reduction with lithium aluminium hydride yields a secondary amine ? .A. Methyl CyanideB. NitroethaneC. MethylisocyanideD. Acetamide |
| Answer» Correct Answer - C | |
| 261. |
Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid:A. `CH_(3)- overset(O) overset(||)(C)-CH_(3)`B. `C_(6)H_(5)CH_(2)CHO`C. `C_(6)H_(5)CHO`D. `CH_(3)CH_(2)CH_(2)CHO ` |
| Answer» Correct Answer - C | |
| 262. |
Some hyperthermophilic organisms that grow in highly acidic `(pH2)` habitats belong to the two groupsA. Eubacteria and archeaB. Cyanobacteria and diatomsC. Protists and mossesD. Liverworts and yeasts |
| Answer» Correct Answer - A | |
| 263. |
The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?A. 10 HzB. 20 HzC. 30HzD. 40 Hz |
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Answer» Correct Answer - B Two successive frequencies of closed pipe `(nv)/(rl)=220` .....(i) `((n+2)v)/(4I)=260` ...... (ii) Dividing (ii) by (i) , we get `(n+2)/(n)=(260)/(220)=(13)/(11)` ` 11n+22=13n` ` n=11 ` So, ` 11 (v)/(4I)=220` `(v)/(4l)=20` So fundamental frequency is 20 Hz . |
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| 264. |
The number of beta particles emitter by radioactive sustance is twice the number of alpha particles emitter by it. The resulting daughter is anA. Isotope of parentB. Isobar of parentC. Isomer of parentD. Isotone of parent |
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Answer» Correct Answer - A `""_(Z)X^(A) overset(alpha)to ""_(Z-2)Y^(A-4) overset(2 beta) to ""_(Z)P^(A-4)` As the resulting daughter and parent nucleus has same atomic number. So they are isotope. |
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| 265. |
In a Rutherford scattering experiment when a projectile of change `Z_(1)` and mass `M_(1)` approaches s target nucleus of change `Z_(2)` and mass `M_(2)`, te distance of closed approach is `r_(0)`. The energy of the projectile isA. Directly proportional to mass `M_(1)`B. Directly proportional to `M_(1) xx M_(2)`C. Directly proportional to `Z_(1)Z_(2)`D. Inversely proportional to `Z_(1)` |
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Answer» Correct Answer - C Energy `=(1)/(4 pi in_(0))(Z_(1)Z_(2))/(r_(0))` |
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| 266. |
The ionization enegry of the electron in the hydrogen atom in its ground state is `13.6 ev`. The atoms are excited to higher energy levels to emit radiations of `6` wavelengths. Maximum wavelength of emitted radiation corresponds to the transition betweenA. n = 4 to n = 3 statesB. n = 3 to n = 2 statesC. n = 3 to n = 1 statesD. n = 2 to n = 1 states |
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Answer» Correct Answer - A `(n(n-1))/(2)=6 ` `implies n=4 ` For maximum wavelength energy difference betweeen states should be minimum because `lambda=(hc)/(DeltaE)` So , transition state in `n=4` to n=3 |
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| 267. |
The ionization energy of H-atom is `13.6eV`. Calculate the is ionization energy of `Li^(+2)`ion-A. 122.4 eVB. 40.8 eVC. 30.6 eVD. 13.6 eV |
| Answer» Correct Answer - C | |
| 268. |
If there is no rotation of plane polarized light by a compound in a specific solvent, through to be chiral, it may mean that:A. The compound may be a racemic mixtureB. The compound is certainly a chiralC. The compound is certainly mesoD. There is no compound in the solvent |
| Answer» Correct Answer - A | |
| 269. |
The internal energy change in a system that has absorbed `2 kcal` of heat and done `500J` of work isA. 7900JB. 8900JC. 6400JD. 5400J |
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Answer» Correct Answer - A `dU=Q-W=8400-500=7900J` |
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| 270. |
If `DeltaU` and `Delta W` represent the increase in internal energy and work done by the system resectively in a thermodynamical process, which of the following is true? |
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Answer» Correct Answer - A `DeltaQ=DeltaU+DeltaW` in adiabatic process `DeltaQ=0` |
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| 271. |
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artifical pacemaker is to be grafted in him. It is likely that it will be grafted at the site of `-`A. Purkinje systemB. Sinuatrial nodeC. Atrioventricular nodeD. Atrioventricular bundle |
| Answer» Correct Answer - B | |
| 272. |
Fastest distribution of some injectible meterial`//`medicine and with no risk of any kind can be achieved by injecting it into theA. arteriesB. veinsC. lymph vessels D. muscles |
| Answer» Correct Answer - B | |
| 273. |
Fastest distribution of some injectible meterial`//`medicine and with no risk of any kind can be achieved by injecting it into theA. arteriesB. veinsC. lymph vesselsD. muscles |
| Answer» Correct Answer - B | |
| 274. |
A source `S_(1)` is producing `10^(15)` photons/s of wavelength `5000 Å` Another source `S_(2)` is producing `1.02 xx 10^(15)` photons per second of wavelength `5100 Å`. Then `("power of" `S_(2))/("power of" S_(1))` is equal toA. 1B. 1.02C. 10.4D. 0.98 |
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Answer» Correct Answer - A `("power of "S_(2))/("power of"S_(1))=(n_(2)((hc)/(lamda_(2))))/(n_(1)((hc)/(lamda_(1))))=(n_(2)lamda_(1))/(n_(1)lamda_(2))=1` |
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| 275. |
The first ionisation potential of `Na` is `5.1eV`. The value of eectrons gain enthalpy of `Na^(+)` will beA. `+ 10.2 eV`B. ` –5.1 eV `C. `–10.2 eV`D. `+ 2.55 eV` |
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Answer» Correct Answer - B `Moverset(M^(+))toM^++e^_ " "IE_1=5.1eV` `M^+e^(-)toM " "DeltaH_(eg)=-5.1eV` |
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| 276. |
The magnetic potential energy stored in a certain inductor is `25mJ`, when the current in the inductor is `60 mA`. This inductor is of inductanceA. 1.389 HB. 138.88 HC. 0.138 HD. 13.89 H |
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Answer» Correct Answer - D Energy stored in inductor `U=(1)/(2)LI^(2)` `25xx10^(-3)=(1)/(2)xxLxx(60xx10^(-3))^(2)` `L=(25xx2xx10^(6)xx10^(-3))/(3600)` `=(500)/(36)` `=13.89 H` |
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| 277. |
An `EM` wave is propagating in a medium whith a velocity `vecv=vhati`. The instantaneous oscillating electric field of this of em wave is along `+y` axis. Then the direction of oscillating magnetic field of the `EM` wave will be alongA. `-y` directionB. `+z` directionC. `-z` directionD. `-x` direction |
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Answer» Correct Answer - B `vec E xx vecB=vecV` `(Ehat j)xxvec (B)=V hat i` So,` vecB=Bhat K` Direction of propagation is along +z direction. |
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| 278. |
Living beings maintain continuity of life by:A. AdaptationB. DNA-replication and its transfer in next generationC. RNA synthesisD. None of the above |
| Answer» Correct Answer - B | |
| 279. |
Bulk of carbon dioxide `(CO_(2))` released from body tissues into the blood is present asA. carbamino-haemoglobin in RBCsB. bicarbonate in blood plasma and RBCsC. Free `CO_(2)` in blood plasmaD. 70% carbamino-haemoglobin and 30% as bicarbonate |
| Answer» Correct Answer - B | |
| 280. |
Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically redsuced due to damage in the alveolar wallsA. AsthmaB. PleurisyC. EmphysemaD. Pneumonia |
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Answer» Correct Answer - C Emphysema is pulmonary disease caused by air pollutant causes break down of alveolar wall so reduces surface area of gasesous exchange. |
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| 281. |
Which of the following oxidation states are the most characteristics for lead and tin, respectively?A. `+2,+2`B. `+4,+2`C. `+2,+4`D. `+4,+4 ` |
| Answer» Correct Answer - C | |
| 282. |
Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle? A. A-CytokinesisB. B-MetaphaseC. C-KaryokinesisD. D-Synthetic phase |
| Answer» Correct Answer - 4 | |
| 283. |
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in :A. Bronchioles and Fallopian tubesB. Bile duct and BronchiolesC. Fallopian tubes and Pancreatic ductD. Eustachian tube and Salivary duct |
| Answer» Correct Answer - A | |
| 284. |
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of theseA. Are exclusively synthesized in the body of a living organism as at presentB. enhance oxidative metabolismC. Are conjugated proteinsD. Help in regulating metabolism |
| Answer» Correct Answer - D | |
| 285. |
Which of the following pairs of species have the same bond order ?A. `CO,NO`B. `O_(2),NO^(+)`C. `CN^(-),CO`D. `N_(2),O_(2)^(-)` |
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Answer» Correct Answer - C `CN^((-)) and CO` have bond order 3 each . |
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| 286. |
A first order reaction has specific rate of `10^(-2)s^(-1)`. How much time will it take for 20 g of the reactant to reduce to 5 g?A. 238.6 secondB. 138.6 secondC. 346.5 secondD. 693.0 second |
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Answer» Correct Answer - B `t_(t//2)=(0.693)/(10^(-2))` second For the reduction of 20 g of reactant to 5g , two `t_(1//2)` is rquired . `:. t=2xx(0.693)/(10^(-2))` second `=138.6` second |
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| 287. |
Reactivity order of halides of dehydrohalogenation isA. R – F gt R – Cl gt R – Br gt R – IB. R – I gt R – Br gt R – Cl gt R – FC. R – I gt R – Cl gt R – Br gt R – FD. R – F gt R – I gt R – Br gt R – Cl |
| Answer» Correct Answer - B | |
| 288. |
Chloropicrin is obtained by the reaction ofA. Nitric acid on chlorobenzeneB. Chlorine on picric acidC. Nitric acid on chloroformD. Steam on carbon tetrachloride |
| Answer» Correct Answer - C | |
| 289. |
1.00 g of a non-electrolyte solute (molar mass 250g `mol^(–1)`) was dissolved in 51.2 g of benzene. If the freezing point depression constant `K_(f)` of benzene is 5.12 K kg `mol^(–1)`, the freezing point of benzene will be lowered by:-A. 0.4 KB. 0.3 KC. 0.5 KD. 0.2 K |
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Answer» Correct Answer - A `DeltaT_(f)=molalityxxK_(f)` `DeltaT_(f)=((1xx1000)/(250xx51.2))xx5.12` `DeltaT_(f)=0.4K` |
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| 290. |
The correct order of increasing bond angle in the following species isA. ` Cl_(2)O lt ClO_(2) lt ClO_(2)^(– )`B. ` ClO_(2) lt Cl_(2)O lt ClO_(2)^(– )`C. `Cl_(2)O lt ClO_(2)^(–) lt ClO_(2)`D. ` ClO_(2)^(–) lt Cl_(2)O lt ClO_(2 )` |
| Answer» Correct Answer - C | |
| 291. |
`AIF_(3)` is soluble in `HF` only in presence of `KF`. It is due to the formation ofA. `K_(3)[AlF_(3)H_(3)]`B. `K_(3)[AlF_(6)]`C. `AlH_(3)`D. `K[AlF_(3)H]` |
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Answer» Correct Answer - B KF dissociate to give `F^(-)` and form soluble complex with `AlF_(3)` ltBrgt `AlF_(3)+3KF to K_(3)[AlF_(6)]` |
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| 292. |
Equimolar solution of the following were prepared in water separately. Which one of the solutions will record the highest `pH`?A. `MgCl_(2)`B. `CaCl_(2)`C. `SrCl_(2)`D. `BaCl_(2)` |
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Answer» Correct Answer - D Equimolar solutions of the given chlorides when prepared in water forms their respective hydroxides. `Be(OH)_(2)` is amphoteric, but the hydroxides of other alkaline earth metals are basic. The basic strength increases down the group. Therefore higher the basic character higher will be the pH. |
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| 293. |
An electric dipole of moment `vec(P)` is lying along a uniform electric field `vec(E )`. The work done in rotating the dipole by `90^(@)` is:A. `sqrt2`pEB. `pE/2`C. 2pED. p E |
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Answer» Correct Answer - D Work done in rotating a diole from `0_(1) to 0_(2)` is `W=pE(cos0_(1)-cos 0_(2))` Here `0_(1)=0^(@) and 0_(2)=90^(@) therefore W=pE` |
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| 294. |
A convex lens and a concave lens, each having same focal length of `25 cm`, are put in contact to form a combination of lenses. The power in diopters of the combination isA. 25B. 50C. InfiniteD. Zero |
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Answer» Correct Answer - D `P=P_(1)+P_(2)=(1)/(f_(1))+(1)/(f_(2))=(1)/(-25)=0` |
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| 295. |
A transverse wave propagating along x-axis is represented by: `y(x,t)=8.0sin(0.5pix-4pit-(pi)/(4))` Where `x` is in metres and `t` is in seconds. The speed of the wave is:A. `4pi m/s`B. `0.5 pi m/s`C. `pi/4 m/s`D. `8 m/s` |
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Answer» Correct Answer - D `V=(omega)/k=(4pi)/(0.5pi)=8ms^(-1)` |
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| 296. |
A circular platform is mounted on a frictionless vertical axle. Its radius `R = 2m` and its moment of inertia about the axle is `200 kg m^(2)`. It is initially at rest. A `50 kg` man stands on the edge at the platform and begins to walk along the edge at the speed of `1ms^(-1)` relative to the ground. Time taken by the man to complete one revolution is :A. `(3pi)/(2)s`B. `2pis`C. `(pi)/(2)s`D. `pis` |
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Answer» Correct Answer - B `I_(1)omega_(1)+I_(2)omega_(2)=0` `200((1)/(2))+200omega_(2)=0` `omega_(2)=-(1)/(2)` `omega_(R)=omega_(1)-omega_(2)=1"rad/sec"` `T=(2pi)/(omega)=2pisec` |
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| 297. |
A car of mass `m` is moving on a level circular track of radius `R` if `mu_(s)` represents the static friction between the road and tyres of the car, the maximum speed of the car in circular motion is given by.A. `sqrt(Rg//mu_(s))`B. `sqrt(mRg//mu_(s))`C. `sqrt(mu_(s)Rg)`D. `sqrt(mu_(s)mRg)` |
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Answer» Correct Answer - C `mu mg ge (mv^(2))/(R)` `v le sqrt(muRg)` `v_("max")=sqrt(muRg)` |
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| 298. |
During ecological succession:A. The changes lead to a community that is in near equilibrium with the environment and is called pioneer communityB. the gradual and predictable change in species composition occurs in a given areaC. The establishment of a new biotic community is very fast in its primary phase.D. the numbers and types of animals remain constant. |
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Answer» Correct Answer - B Succession is gradual & Predictable change in species composition occurs in a area. |
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| 299. |
Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard whenA. A V node receives signal from SA nodeB. AV valves open upC. Ventricular walls vibrate due to gushing in of blood from atriaD. Semilunar valves close down after the blood flows into vessels from ventricles |
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Answer» Correct Answer - D Closure of Bicuspid & tricuspid valve produces first heart sound (lubb) while of semilunar valve produces second heart sound (Dup). |
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| 300. |
Embryo with more than 16 blastomeres formed due to in vitro fertilization in transferred into :A. uterusB. fallopian tubeC. fimbriaeD. cervix |
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Answer» Correct Answer - A Embryos with more than 16 blastomeres formed due to in vitro fertilization is transferred into uterus for implanation. |
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