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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.
| 1. |
A body of mass m is released from a height h on a smooth inclined plane that is shown in the figure. The following can be true about the velocity of the block knowing that the wedge is fixed. .A. Speed is maximum when resultant force on the block is zero.B. Speed is maximum when it compresses the spring by some amountC. Speed is maximum when the spring comes back to natural positionD. none of these |
| Answer» Correct Answer - A::B | |
| 2. |
On an inclined plane making an angle `theta` with the horizontal plane, a solid cylinder of mass `m_(1)` is connected to a block of mass `m_(2)` by means of a light chord which is parallel to incline plane . The coefficient of friction between block and incline and between cylinder and incline is equal to `mu` . the system is held at rest & then released . If cylinder & block move together and cylinder perform pure rolling & tension in string is non zero then Minimum value of `mu` for which cylinder will not slip ? A. `((m_(1)+m_(2))tantheta)/(m_(1)+2m_2)`B. `(2)/(3)tantheta`C. `((m_(1)+m_(2))tantheta)/((3)/(2)m_(1)+2m_(2))`D. `(tantheta)/(3)` |
| Answer» Correct Answer - D | |
| 3. |
On an inclined plane making an angle `theta` with the horizontal plane, a solid cylinder of mass `m_(1)` is connected to a block of mass `m_(2)` by means of a light chord which is parallel to incline plane . The coefficient of friction between block and incline and between cylinder and incline is equal to `mu` . the system is held at rest & then released . If cylinder & block move together and cylinder perform pure rolling & tension in string is non zero then Acceleration of block will be : A. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((3)/(2)m_(1)+m_(2))`B. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((3)/(2)m_(1)+m_(2))`C. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((3)/(2)m_(1)+2m_(2))`D. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((5)/(2)m_(1)+m_(2))` |
| Answer» Correct Answer - A | |
| 4. |
A uniform cylinder of mass `m` lies on a fixed plane inclined at a angle `theta` with the horizontal. A light string is tied to the cylinder at the rightmost point, and a mass `m` hangs from the string as shown. Assume that the coefficient of friction between the cylinder and the incline plane is sufficiently large to prevent slipping. for the cylinder to remain static the value of `m` is A. `("M" cos theta)/(1+sintheta)`B. `("M" sin theta)/(1+sintheta)`C. `("M" cos theta)/(1-sintheta)`D. `("M" sin theta)/(1-sintheta)` |
| Answer» Correct Answer - D | |
| 5. |
The Fig. shows a string of equally placed beads of mass `m`, separated by distance `d`. The beads are free to slide without friction on a thin wire. A constant force F act on the first bead initially at rest till it makes collision with the second bead. The second bead then collides with the third and so on. Supposed that all collisions are elastic, A. Speed of first bead immediately before and immediately after its collision with the second bead is `sqrt((2Fd)/(m))` and zero respectively.B. Speed of first bead immediately before and immediately after its collision with the second bead is `sqrt((2Fd)/(m))and(1)/(2)sqrt((2Fd)/(m))` respectively.C. Speed of second bead immediately after its collision with the third bead is zero.D. The average speed of the first bead during its motion is `(1)/(2)sqrt((2Fd)/(m)).` |
| Answer» Correct Answer - A::C::D | |
| 6. |
Which of the following compound gives yellowish white turbidity with dil. `H_(2)SO_(4)`?A. `Na_(2)SO_(3)`B. `NaNO_(3)`C. `Na_(2)S_(2)O_(3)`D. `Na_(2)S` |
| Answer» Correct Answer - C | |
| 7. |
Which of following shows highest rate of decarboxylation in presence of soda lime :A. `underset(F)underset(|)(C)H_(2)-COOH`B. `underset(Cl)underset(|)CH_(2)-overset(O)overset(||)C-OH`C. `underset(Br)underset(|)CH_(2)-overset(O)overset(||)C-OH`D. `underset("I ")underset(|)CH_(2)-overset(O)overset(||)C-OH` |
| Answer» Correct Answer - B | |
| 8. |
`Aoverset("KCN")toBoverset(H_(3)O+)underset(NH_(3)//Delta)toCoverset(Br_(2))underset(KOH)toCH_(3)-CH_(2)-NH_(2)` reactant A in given reaction sequence?A. `CH_(3)-CH_(2)-CH_(2)-Cl`B. `CH_(3)-CH_(2)-Cl`C. `CH_(3)-Cl`D. `CH_(3)-underset(CH_(3))underset(|)CH-Cl` |
| Answer» Correct Answer - B | |
| 9. |
Photons are incident from vacuum on a transparent material with a refractive index n for a given wavelength. Determine the momentum of the incident photon, if its wavelength in the material is equal to `lambda`.A. `nh//lambda`B. `h//lambda`C. `h/(nlambda)`D. `h//lambda(n+1)` |
| Answer» Correct Answer - C | |
| 10. |
Assertion : Photoelectric effect supports the quantum nature of light. Reason : Photoelectric emission is instantaneous.A. there is a minimum frequency of light below which no photoelectrons are emitted.B. the maximum K.E. of photoelectrons depends only on the frequency of light and not on its intensity.C. even when the metal surface is faintly illuminated by light of the approximate wavelength, the photoelectrons leave the surface immediately.D. electric charge of photoelectrons is quantized. |
| Answer» Correct Answer - C | |
| 11. |
Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperture exponentially as `K=A.e^(-Ea//RT)`. This method is generally used for finding the activation energy of reaction . Keeping temperature constant , effect of catalyst on activation energy has also been studied. If on addition of catalyst to a reaction at 300 K, rate of reaction increase by `e^(20)` , then difference of activation energy in a absence in absence of catalyst and in presence of catalyst is -A. 15 kcal/moleB. 18 kcal/moleC. 12 kcal/moleD. 24 kcal/ mole |
| Answer» Correct Answer - C | |
| 12. |
Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperture exponentially as `K=A.e^(-Ea//RT)`. This method is generally used for finding the activation energy of reaction . Keeping temperature constant , effect of catalyst on activation energy has also been studied. If the rate of reaction double for rise of temperature from 500K to 1000K, the activation energy of the reaction will be approximately [ln2=0.7]A. 1.2 kcal/moleB. 1.4 kcal / moleC. 1.8 kcal / moleD. 2.4 kcal/ mole |
| Answer» Correct Answer - B | |
| 13. |
A heshly prepared radioactive source of half life 2 hrs emits radiation of intensity which is 32 times the permissible safe value of intensity. Which of the following is the minimum time after which it would be possible to work safely with this source?A. 16 hrsB. 5hrsC. 10 hrsD. 32 hrs |
| Answer» Correct Answer - C | |
| 14. |
The radius of the shortest orbit in a one electron system is 18 pm it may beA. HydrogenB. DeuteriumC. `He^+`D. `Li^+` |
| Answer» Correct Answer - D | |
| 15. |
If `E_1, E_2 and E_3` represent respectively the kinetic energies of an electron, an `alpha - particle` and a proton each having same de-Broglie wavelength, thenA. `E_1gtE_2gtE_3`B. `E_2gtE_3gtE_1`C. `E_1gtE_2gtE_2`D. `E_1=E_2=E_3` |
| Answer» Correct Answer - C | |
| 16. |
The normal at a point `P`on the ellipse `x^2+4y^2=16`meets the x-axis at `Qdot`If `M`is the midpoint of the line segment `P Q ,`then the locus of `M`intersects the latus rectums of the given ellipse at points.`(+-((3sqrt(5)))/2+-2/7)`(b) `(+-((3sqrt(5)))/2+-(sqrt(19))/7)``(+-2sqrt(3),+-1/7)`(d) `(+-2sqrt(3)+-(4sqrt(3))/7)`A. `(pm(3sqrt4)/2,pm2/7)`B. `(pm(3sqrt4)/2,pmsqrt19/4)`C. `(pm2sqrt3,pmsqrt1/7)`D. `(pm2sqrt3,pm(4sqrt(3))/4)` |
| Answer» Correct Answer - C | |
| 17. |
The coordinates of the focus of the parabola described parametrically by `x=5t^2+2.y=10t+4` areA. (7,4)B. (3,4)C. (3,-4)D. (-7,4) |
| Answer» Correct Answer - A | |
| 18. |
India plays two matches each with West Indies and Australia. In any match the probabilities of India getting points `0, 1 and 2` are `0.45, 0.05 and 0.50` respectively. Assuming that the outcomes are independent, the probability of India getting at least 7 points is (a) `0.8750` (b) `0.0875` (c) `0.0625` (d) `0.0250`A. 0.875B. 0.0875C. 0.0625D. 0.025 |
| Answer» Correct Answer - B | |
| 19. |
Correct set of reaction which produce carbanion intermediate is/areA. B. `Ph-underset(O)underset(||)C-CH_(3)overset(NaOI)toPhCO_(2)Na+CHI_(3)`C. `Ph-overset(O)overset(||)C-Hoverset(Ac_(2)O+AcONa)underset(Delta)toPh-CH=CH-COOH`D. |
| Answer» Correct Answer - A::B::C | |
| 20. |
Which of the following metal (s) produce(s) `N_2O` gas on reaction with 20% `HNO_3`A. FeB. SnC. CuD. Zn |
| Answer» Correct Answer - AD | |
| 21. |
The value of the following limit `lim_(ntooo) n(n+1)(ln(1+(1)/(n))-sin((1)/(n+1)))`si-A. `(1)/(2)`B. `-(1)/(2)`C. 0D. does not exist |
| Answer» Correct Answer - A | |
| 22. |
Which of the following is correct order of `-1` ?A. `-FF gt -NO_(2) gt -CH gt Br`B. `-overset(oplus)(NH_(3)) gt NO_(2) gt -CN gt -underset(O)underset(||)(C) -H`C. `-overset(oplus)(NH_(3)) gt -overset(oplus)(NH_(2)Me) gt -overset(oplus)(NHMe_(2) gt -overset(oplus)(NMe_(3))`D. `-NH_(4) gt -OH gt -Cl gt - Br` |
| Answer» Correct Answer - B | |
| 23. |
M gram of a substance when vapourised occupies of `5.6` litre at NTP. The molar mass (in g/mol) of the substance will be :A. `2M`B. `4M`C. `8M`D. `16M` |
| Answer» Correct Answer - B | |
| 24. |
Which of the following has highest heat of combustion ?A. B. C. D. |
| Answer» Correct Answer - C | |
| 25. |
Which of the following pairs of structures does not represent valid resontaing structures.A. B. C. D. |
| Answer» Correct Answer - A | |
| 26. |
The CORRECT statement is/are :-A. Al - metal is extracted by electrolytic reduction of fused mixture of `Al_(2)O_(3)+Na_(3)AlF_(6)+CaF_(2)`B. `Fe_(2)O_(3)` is reduced into Fe mainly by CO - reducing agent in blast furnaceC. Zn - metal displaces , `Ag^(+)` ion from the aqueous solution of `Na[Ag(CN)_(2)]`D. Depressant NaCN is used to separate PbS from the mixture of ZnS and PbS. |
| Answer» Correct Answer - A::B::C::D | |
| 27. |
Which of the following is endothermic process :A. `CI(g)+e^(-)rarr CI^(-)(g)`B. `S^(-)(g)+e^(-)rarrS^(2-)(g)`C. `Na^(+)(g)+e^(-)rarr Na(g)`D. `O^(2-)(g)rarr O^(-)+e^(-)` |
| Answer» Correct Answer - B | |
| 28. |
Which of the following reactions is not a disproportination reaction ?A. `NaOH+NO_(2)rarr NaNO_(2)+NaNO_(3)+H_(2)O`B. `NaOH+Cl_(2)rarr NaCl+NaClO_(3)+H_(2)O`C. `NaOH+S rarr Na_(2)S+Na_(2)S_(2)O_(3)+H_(2)O`D. `NaOH+F_(2)rarr OF_(2)+NaF+H_(2)O` |
| Answer» Correct Answer - D | |
| 29. |
Which of the following reactions (s) is/are correctly represented to proceed in forward direction?A. `3S^(2-)+Cr_(2)O_(7)^(2-)+underset(("dil acid"))(14H^(oplus))to3S(darr)+2Cr^(3+)+7H_(2)O`B. `2BaSO_(3)+underset(("air"))(O_(2))overset(Delta)to2BaSO_(4)`C. `ZnS+BaSO_(4)toBaS+ZnSO_(4)`D. `2Br^(-)underset(("excess"))(Cl_(2))+"water"to2BrCl` |
| Answer» Correct Answer - A::B::D | |
| 30. |
Which of the following is least basicA. B. C. D. |
| Answer» Correct Answer - D | |
| 31. |
Which of the following names are correctly written against them ?A. `rarr` hexa-1, 4-dien-3-amineB. `rarr` 1-carbamoyle ethaneC. `rarr` 2,4-dimethyl-5-oxopentanoyl chlorideD. `rarr` 1, 5-Diamino-4-hydroxy hex -2-en-1-one |
| Answer» Correct Answer - A::C::D | |
| 32. |
A bock of mass 0.5 kg is pulled by 12 N force on a fixed block. Speed of block is constant. Find total contact force applied by lower block on upper block. A. `12 N`B. `5 N`C. `13 N`D. `17 N` |
| Answer» Correct Answer - C | |
| 33. |
Find longest wavelength in Lyman series of hydrogen atom spectrum.A. 1216ÅB. 216ÅC. 1016ÅD. 116Å |
| Answer» Correct Answer - A | |
| 34. |
You accidently bump into a bokcase. It tils briefly but then returns to upright, and you breathe a sigh of relief. When you first bumped the brookcase, its center of gravity moved.A. Upward and its gravitational potential energy increased.B. downward and its gravitational potential energy decreased.C. downward and its gravitational potential energy increased.D. upward and its gravitational potential energy increased. |
| Answer» Correct Answer - A::C::D | |
| 35. |
Which of the following does not gives Friedel-Crafts reaction ?A. B. C. D. |
| Answer» Correct Answer - BCD | |
| 36. |
`underset(HCl)overset(NaNO_(2))to` product?A. B. C. D. |
| Answer» Correct Answer - C | |
| 37. |
Which of the following is the triad of a homologous series -A. `CH_(3)NH_(2), (CH_(3))_(2)NH, (CH_(3))_(3)N`B. `C_(2)H_(5)OH, (CH_(3))_(2)CHOH`, `H_(3)C -underset(CH_(3))underset(|)overset(CH)overset(|)(C)-O-CH_(3)`C. `CH_(3)-CH_(2)-underset(O)underset(||)(C)-H`, `H_(3)C-underset(O)underset(||)(C)-CH_(2)-CH_(3)`, `H_(3)C-underset(O)underset(||)-CH_(2)-CH_(2)-CH_(3)`D. `CH_(2) = CH_(2), CH_(3) - CH = CH_(2)`, `C_(2)H_(5) -CH = CH_(2)` |
| Answer» Correct Answer - D | |
| 38. |
The correct IUPAC name of the following compound is : `O = underset(OH)underset(|)(C)-CH_(2) -underset(H-C = O)underset(|)(CH) - CHO`A. 3,3 -diformyl propanoic acidB. 3-formyl-4-oxo-butanoic acidC. 3,3-dioxo propanoic acidD. 3,3-dicarbadehyde propanoic acid |
| Answer» Correct Answer - B | |
| 39. |
Statement-1 : Nitrogen atom has highter ionization energy than fluorine atom. Statement-2 : Nitrogen atom has extra stable electronic configuration due to half filled p-subshell.A. Statement-1 : is true, statement -2 is true and statement-2 is correct explanation for statement-1.B. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.C. Statement-1 is true, statement-2 is falseD. Statement-1 is false, statement-2 is true |
| Answer» Correct Answer - D | |
| 40. |
Which resonating struction is most stable ?A. B. C. D. |
| Answer» Correct Answer - C | |
| 41. |
Which among the following has less rate of effusion than moist air under similar condition :A. HeB. Dry airC. `NH_(3)`D. Heavy hydrogen |
| Answer» Correct Answer - B | |
| 42. |
Indicate the correct order of acidic strength (first ionization ) in the following dicarboxylic acids. A. `I gt II gt III gt IV`B. `II gt IV gt I gt III`C. `III gt I gt IV gt II`D. `IV gt II gt I gt III` |
| Answer» Correct Answer - C | |
| 43. |
Electronic configuration of `._(29)Cu` in ground state is :A. `[Ar]3d^(9), 4s^(2)`B. `[Ar]3d^(10), 4s^(1)`C. `[Ar]3d^(10), 4s^(2)`D. `[Ar]3d^(9), 4s^(1)` |
| Answer» Correct Answer - B | |
| 44. |
Choose correct order of atomic radii :A. `Li lt Be`B. `K lt Ca`C. `Ba lt K`D. `Cs lt Rb` |
| Answer» Correct Answer - C | |
| 45. |
Identify in which of the following case can the average molecular mass of the mixture be 150 at same instant in a reactionA. `N_(2(g)) + 3H_(2(g)) to 2NH_(3(g))`B. `PCl_(3(g))+Cl_(2(g))to PCl_(5(g))`C. `H_(2(g))+1/2O_(2(g))to H_(2)O_((g))`D. `H_(2(g))+Cl_(2(g)) to 2HCl_((g))` |
|
Answer» Answer: Because only in this case there are gases having molar mass greater than 150 |
|
| 46. |
`overset(HlO_(4))to` product isA. B. C. D. |
| Answer» Correct Answer - A | |
| 47. |
Identify the correct rate of hydrolysis.A. igtiigtiiiB. iigtiiigtiC. igtiiigtiiD. iigtigtii |
| Answer» Correct Answer - A | |
| 48. |
Which of the following agetns is responsible for generating chlorine radicals into stratosphere?A. SmogB. `NO_(2)`C. UV radiationD. CFC |
| Answer» Correct Answer - D | |
| 49. |
Which of the following compound is possible :A. `PbI_(4)`B. `AlO_(2)`C. `NaF_(2)`D. `PbO_(2)` |
| Answer» Correct Answer - D | |
| 50. |
The element which shows both positive & negative oxidation state is :A. `Li`B. `Mg`C. `He`D. `H` |
| Answer» Correct Answer - A | |