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.
| 1. |
Which of the following is not correct for the velocity of electron?A. B. C. D. |
| Answer» Correct Answer - A | |
| 2. |
What is the molarity of HCl in a solution prepared by dissolving 5.5 g HCl in 200g ethanol if the density of solution is 0.79g/mL?A. `0.58 M`B. `0.21 M`C. `0.93 M`D. `1.7 M` |
| Answer» Correct Answer - A | |
| 3. |
For the reaction, `N_(2)H_(4)(l)+2H_(2)O_(2)(l) rarr N_(2)(g)+4H_(2)O(g)` heats of formation of `N_(2)H_(4), H_(2)O_(2), H_(2)O` are 12, -45 and `-57.8 "kcal mol"^(-1)`. Internal energy change for this reaction is/are at 298 K:A. `-153.2 "kcal mol"^(-1)`B. `-641.142 kJ mol^(-1)`C. `-24.8 kcal mol^(-1)`D. `-309 "kcal mol"^(-1)` |
| Answer» Correct Answer - A::B | |
| 4. |
Rate law for a chemical reactions is : Rate `=k[A]^(1//2)[B]^(1)` Choose the correct options among the following :A. Order of the reaction is 3/2B. Unit of its rate constant is `"litre"^(1//2) mol^(-1//2) sec^(-1)`C. Unit of rate is mol `"litre"^(-1) sec^(-1)`D. Its molecularity is always 3 |
| Answer» Correct Answer - A::B::C | |
| 5. |
Liquid benzene burns in oxygen according to: `2C_(6)H_(6)+15O_(2) rarr 12CO_(2)+6H_(2)O` If density of liquid benzene is 0.88g/cc, what volume of `O_(2)` at STP is needed to complete the combustion of 39 cc of liquid benzene?A. 11.2 litreB. 74 litreC. `0.074 m^(3)`D. `37 dm^(3)` |
| Answer» Correct Answer - B::C | |
| 6. |
Match the List-I with List-II and choose the correct answer from the codes: A. `{:(A,B,C,D),(1,2,3,4):}`B. `{:(A,B,C,D),(2,3,1,4):}`C. `{:(A,B,C,D),(4,3,2,1):}`D. `{:(A,B,C,D),(3,2,4,1):}` |
| Answer» Correct Answer - D | |
| 7. |
Match the List-I with List-II: A. `{:((I),(II),(III),(IV),),(3,4,5,1,):}`B. `{:((I),(II),(III),(IV),),(4,5,1,2,):}`C. `{:((I),(II),(III),(IV),),(5,6,2,3,):}`D. `{:((I),(II),(III),(IV),),(6,1,3,4,):}` |
| Answer» Correct Answer - D | |
| 8. |
Match the List-I with List-II and select the correct answer from given codes: A. `{:(A,B,C,D),(1,3,2,4):}`B. `{:(A,B,C,D),(1,2,3,4):}`C. `{:(A,B,C,D),(4,3,2,1):}`D. `{:(A,B,C,D),(1,2,4,3):}` |
| Answer» Correct Answer - A | |
| 9. |
Match the Colunm-X with Column-Y: A. `{:((I),(II),(III),(IV),),(A,B,C,D,):}`B. `{:((I),(II),(III),(IV),),(A,C,B,D,):}`C. `{:((I),(II),(III),(IV),),(B,A,D,C,):}`D. `{:((I),(II),(III),(IV),),(B,A,C,D,):}` |
| Answer» Correct Answer - C | |
| 10. |
Match the Colunm-I with Column-II and select the correct answer using the sequences given below: A. `{:(A,B,C,D),(3,4,2,1):}`B. `{:(A,B,C,D),(4,3,1,2):}`C. `{:(A,B,C,D),(3,4,1,2):}`D. `{:(A,B,C,D),(4,3,2,1):}` |
| Answer» Correct Answer - A | |
| 11. |
Match the List-I with List-II and select the correct answer using the options given below the lists: A. `"I-4 II-1 III-2 IV-3"`B. `"I-2 II-3 III-4 IV-1"`C. `"I-3 II-1 III-2 IV-4"`D. `"I-1 II-2 III-3 IV-4"` |
| Answer» Correct Answer - A | |
| 12. |
Match the List-I, List-II and List-III and select the answer from the given codes: A. `{:(A,B,C,D),(i-2,ii-4,iii-3,iv-1):}`B. `{:(A,B,C,D),(i-4,iv-3,ii-2,iii-1):}`C. `{:(A,B,C,D),(iv-3,iii-1,ii-2,i-4):}`D. `{:(A,B,C,D),(ii-2,i-1,iii-3,iv-4):}` |
| Answer» Correct Answer - C | |
| 13. |
Match the Colunm-I with Column-II : A. `"I-1 II-2 III-3 IV-4"`B. `"I-4 II-3 III-2 IV-1"`C. `"I-4 II-2 III-3 IV-1"`D. `"I-4 II-3 III-1 IV-2"` |
| Answer» Correct Answer - C | |
| 14. |
`CH_(3)COOH` is neutralized by NaOH. Conductometric titration curve will be of the type:A. B. C. D. |
| Answer» Correct Answer - A | |
| 15. |
Match the List-1 (solutions of salts) with List-II (pH of the solutions) and select the correct answer using the codes given below the lists: A. `{:(A,B,C,D),(4,3,2,1):}`B. `{:(A,B,C,D),(1,2,3,4):}`C. `{:(A,B,C,D),(2,3,4,1):}`D. `{:(A,B,C,D),(3,2,1,4):}` |
| Answer» Correct Answer - A | |
| 16. |
Match the List-I with List-II and pick up the correct matching from the codes given below: A. `"A-2 B-1 C-4 D-5 E-3"`B. `"A-2 B-5 C-1 D-4 E-3"`C. `"A-3 B-1 C-2 D-5 E-4"`D. `"A-5 B-3 C-1 D-2 E-4"` |
| Answer» Correct Answer - D | |
| 17. |
Which one of the following is the correct order of energies of 3p, 3d, 4s and 4p orbitals as per Aufbau principle?A. `3p lt 3d lt 4s lt 4p`B. `3p lt 4s lt 3d lt 4p`C. `3d lt 4s lt 4p lt 3p`D. `3d lt 3p lt 4p lt 4s` |
| Answer» Correct Answer - B | |
| 18. |
The electronic configuration `1s^(2), 2s^(2) 2p^(5), 3s^(1)` describes which one of the following?A. An excited state of fluorineB. The ground state of neonC. The excited state of `O^(2-)`D. The ground state of fluroide ion `(F^(-))` |
| Answer» Correct Answer - C | |
| 19. |
(A) pH of `10^(-7)` M NaOH solution exists between 7 to 7.3 at `25^(@)C`. (R) Due to common ion effect ionization of water is supressed.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) is false but reason (R) is true |
| Answer» Correct Answer - A | |
| 20. |
Extensive properties among the following is/are:A. refractive indexB. volumeC. densityD. mass |
| Answer» Correct Answer - B::D | |
| 21. |
A cyclic process `ABCA` is shown in the `V-T` diagram process on the `P-V` A. B. C. D. |
| Answer» Correct Answer - C | |
| 22. |
Graph for specific heat at constant volume for a monoatomic gasA. B. C. D. |
| Answer» Correct Answer - C | |
| 23. |
An ideal gas is taken around the cycle `ABCA` shown in `P - V` diagram. The net work done by the gas during the cycle is equal to A. `12P_(1)V_(1)`B. `6P_(1)V_(1)`C. `3P_(1)V_(1)`D. `P_(1)V_(1)` |
|
Answer» Correct Answer - C Correct option is C. \(3P_1V_1\) The net work done by the gas during the cycle = area bounded by cyclic curve ABCA in P-V diagram = \(\frac12 \times AB \times AC\) = \(\frac12 \times (4P_1 - P_1) \times (3V_1 - V_1)\) = \(\frac12 \times (3P_1) \times (2V_1)\) = \(3P_1V_1\) |
|
| 24. |
An ideal monoatomic gas is taken round the cycle ABCDA as shown in the P-V diagram. The work done during the cycle is A. PVB. 2PVC. `(1)/(2)PV`D. zero |
| Answer» Correct Answer - C | |
| 25. |
A heat engine carries one mole of an ideal mono-atomic gas around the cycle as shown in the figure below. Process `1 rarr 2` takes place at constant volume, process `2 rarr 3` is adiabatic and process `3 rarr 1` takes place at constant pressure. Then the amount of heat added in the process `1 rarr2` is A. 3740 JB. `-3740 J`C. 1810 JD. 3220 J |
| Answer» Correct Answer - A | |
| 26. |
Entropy change for an adiabatic reversible process is :A. positiveB. zeroC. negativeD. infinity |
| Answer» Correct Answer - B | |
| 27. |
(A) Entropy decreases when a egg is boiled. (R) It is solidified due to denaturation of albumin.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) and reason (R) both are false |
| Answer» Correct Answer - A | |
| 28. |
(A) `._(56)^(133)Be+e^(-) rarr ._(55)^(133)Cs + "X-ray"` It is a process of K-electron capture. (R) The atomic number decreases by one unit as a result of K-capture.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) and reason (R) both are false |
| Answer» Correct Answer - B | |
| 29. |
The maximu kinetic energy `(E_(k))` of the photoelectron varies with frequency (v) of the incident light as shown by the curve: A. AB. BC. CD. D |
| Answer» Correct Answer - C | |
| 30. |
The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces `A` and `B` . The graphs show that work function of `A` is A. greater than that of BB. smaller than that of BC. same as that of BD. such that no comparison can be done from given graphs |
| Answer» Correct Answer - B | |
| 31. |
Amount of energy required to excite an electron of an atom from the lower energy state to its next higher energy state is defined as:A. ionization potentialB. electron afinityC. critical potentialD. reduction potential |
| Answer» Correct Answer - C | |
| 32. |
If nuclecus in an excited state fall to a lower energy level, energy is emitted as :A. `alpha` -raysB. `beta`-raysC. `gamma`-raysD. X-rays |
| Answer» Correct Answer - C | |
| 33. |
(A) Magnetic quantum number can have the value 0,...., (n-1). (R) Magnetic quantum number specifies the number of orbitals.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) is false but reason (R) is true |
| Answer» Correct Answer - D | |
| 34. |
(A) In a gaseous reaction, `K_(c)` is unitless when `Deltan = 0`. (R) Unit of `K_(c) = (mol L^(-1))^(Deltan)`.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) and reason (R) both are false |
| Answer» Correct Answer - A | |
| 35. |
Select the natural series among the following:A. `(4n+1)`B. `(4n+2)`C. 4nD. `(4n+3)` |
| Answer» Correct Answer - B::C::D | |
| 36. |
Assertion: Half-life period of a reaction of first order is independent of initial concentration. Reason: Half-life period for a first order reaction `t_(1//2) = (2.303)/(K) log 2`.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) and reason (R) both are false |
| Answer» Correct Answer - A | |
| 37. |
Select the correct conclusion (s) about average life:A. Average life `= 1//lambda`B. Average life `= 1.44 xx t_(1//2)`C. The time in which 63.2% element decays is called average lifeD. None of the above |
| Answer» Correct Answer - A::B::C | |
| 38. |
Which of the following statements are correct ?A. 1 faraday is the charge of 1 mole electron.B. 1 faraday is used to deposit 1g equivalent of a substanceC. 5.6 litre `O_(2)` will be evolved at STP by 1 faraday charge.D. 11.2 litre `Cl_(2)` will be evolved at STP by 1 faraday charge |
| Answer» Correct Answer - A::B::C::D | |
| 39. |
Select the species having zero oxidation state at the underlined elements :A. `(CH_(3))_(2)ul(S)O`B. `ul(C)_(12)H_(22)O_(11)`C. `H_(2)ul(S)_(2)O_(3)`D. `ul(N)_(2)H_(4)` |
| Answer» Correct Answer - A::B | |
| 40. |
The percentage ionic character of a covalent bond (A-B) is about 50%, the electronegativity difference of the two elements will be :A. `1.5`B. `2.1`C. `0.9`D. `1.2` |
| Answer» Correct Answer - B | |
| 41. |
(A) `3d_(z^(2))` orbital is spherically symmetrical. (R) `3d_(z^(2))` orbital is the only d-orbital which is spherical in shape.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) and reason (R) both are false |
| Answer» Correct Answer - D | |
| 42. |
An atom has x energy level , then total number of lines in its spectrum are :A. `1+2+3+....+(x+1)`B. `1+2+3+....+x^(2)`C. `1+2+3+...+x`D. `1+2+3+...+(x-1)` |
| Answer» Correct Answer - D | |
| 43. |
Which of the following is the correct relation between solubility product of `MX_(4)` ?A. `S =[(K_(sp))/(256)]^(1//5)`B. `S = [128 K_(sp)]^(1//4)`C. `S = [256K_(sp)]^(1//5)`D. `S = [(K_(sp))/(128)]^(1//4)` |
| Answer» Correct Answer - A | |
| 44. |
(A) Antiferromagnetic substances possess zero magnetic moment. (R) `MnO` is an antiferromagnetic substance.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) and reason (R) both are false |
| Answer» Correct Answer - B | |
| 45. |
(A) 1 faraday = 96,500 coulomb. It is a charge of 1 mole electrons. (R) 1 faraday charge liberates one gram equivalent of substance at an electrode.A. Both (R) and (A) are true and reason is the correct explanation of assertion.B. Both (R) and (A) are true but reason is not correct explanation of assertionC. Assertion (A) is true but reason (R) is falseD. Assertion (A) and reason (R) both are false |
| Answer» Correct Answer - B | |
| 46. |
Which among the following is correct about `gamma`-rays ?A. High energy electronsB. Low energy electronsC. High energy electromagnetic wavesD. High energy positrons |
| Answer» Correct Answer - C | |
| 47. |
Select the correct relation :A. `N_(0) =N.10^(lambdat//2.303)`B. `N_(0) =Ne^(lambda t)`C. `N_(0) = N(lambda)/(10^(2.303t))`D. `N = N_(0)e^(-lambda t)` |
| Answer» Correct Answer - A::B::D | |
| 48. |
Which among of the following has same kinetic energy as `O_(2)` gas at NTP ?A. `H_(2)`B. `N_(2)`C. `CO_(2)`D. None of these |
| Answer» Correct Answer - A::B::C | |
| 49. |
When mercuric iodide is added to the aqueous solution of potassium iodide, then:A. freezing point is raisedB. freezing point does not changeC. freezing point is loweredD. boiling point does not change |
| Answer» Correct Answer - A | |
| 50. |
For a reaction , the overall rate constant is related to individual rate constant by :A. `k=k_(1)-k_(2)`B. `k_(1)//k_(2)`C. `k_(1)k_(2)`D. `k_(1)+k_(2)` |
| Answer» Correct Answer - D | |