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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Depression of freezing point of which of the following solutions does represent the cryoscopic constant of water ?A. 6% by mass of urea in aqueous solutionB. 100 g of aqueous solution containing 18 g of glucoseC. 59 g of aqueous solution containing 9 of glucoseD. 1 M KCI solution in water |
| Answer» Correct Answer - C | |
| 2. |
The two isomers X and Y with the formula `Cr(H_(2)O)_(5)CIBr_(2)` were taken for experiment on depression in freezing point. It was found that one mole of X gave depression corresponding to 2 moles of particles and one mole of Y gave depression due to 3 moles of particels . The structural formulae of x and Y respectively areA. ` [Cr(H_(2)O)_(5)CI]Br_(2) , [Cr(H_(2)O)_(4)Br_(2)] CI.H_(2)O`B. `[Cr(H_(2)O)_(5)CI]Br_(2),[Cr(H_(2)O)_(3)CIBr_(2)].2H_(2)O`C. `[Cr(H_(2)O)_(5)Br]BrCI , [Cr(H_(2)O)_(4)CIBr] Br.H_(2)O`D. `[Cr(H_(2)O)_(4)Br_(2)]CI.H_(2)O , [Cr(H_(2)O)_(5)CI]Br_(2)` |
| Answer» Correct Answer - D | |
| 3. |
The cell in which the following reaction occurs : `2Fe_(aq)^(3+) + 2I_(aq)^(-) to 2Fe_(aq)^(2+) + I_(2(s)) "has" E_("cell")^(o) = 0.236 V "at" 298 K` The equilibrium constnat of the cell reaction isA. `6.69xx 10^(-7)`B. `9.69 xx 10^(-7)`C. `9.69 xx 10^(7)`D. `6.69 xx 10^(7)` |
| Answer» Correct Answer - C | |
| 4. |
Match the column I with column II and mark the appropriate choice A. `A to I, B to ii, C to iii, D to iv`B. `A to iii, B to iv, C to ii, D to i`C. `A to iv, B to ii, C to iii, D to i`D. `A to ii, B to iii, C to iv, D to i` |
| Answer» Correct Answer - B | |
| 5. |
Schottky defect is likely to be found inA. AgIB. NaCIC. ZnSD. ZnO |
| Answer» Correct Answer - B | |
| 6. |
The pyrimidine bases present in DNA areA. cytosine and adenineB. cytosine and guanineC. cytosine and thymineD. cytosine and uracil |
| Answer» Correct Answer - C | |
| 7. |
When acyl chloride is heated with Na Salt of a carboxylic acid the product isA. an aldehydeB. an alkeneC. an anhydrideD. an ester. |
| Answer» Correct Answer - C | |
| 8. |
Which one of the following reactions of xenon compounds is not feasible ?A. `XeO_(3) + 6HF to XeF_(6) + 3H_(2)O`B. `3XeF_(4) + 6H_(2)O to 2Xe + XeO_(3) + 12HF + 1.5O_(2)`C. `2XeF_(2) + 2H_(2)O to 2Xe + 4HF + O_(2)`D. `XeF_(6) + RbF to Rb [XeF_(7)]` |
| Answer» Correct Answer - A | |
| 9. |
Compressibility factor for `H_(2)` behaving as real gas isA. `1`B. `(1-(a)/(RTV))`C. `(1+(Pb)/(RT))`D. `(RTV)/((1-a))` |
| Answer» Correct Answer - C | |
| 10. |
For the reaction, `CO_((g))+Cl_(2(g))hArrCoCl_(2(g))`, the value of `K_(p)//K_(c)` is equal toA. 1B. RTC. `sqrt(RT)`D. `(1)/(RT)` |
| Answer» Correct Answer - D | |
| 11. |
The ions `O^(-2),F^(-),Mg^(2+) and Al^(3+)` are isoelectronic. Their ionic radii showA. a decrease from `O^(2-)` to `F^(-)` and then increase from `Na^(+)` to `Al^(3+)`B. a significant increase from `O^(2-)` to `Al^(3+)`C. a significant decrease from `O^(2-)` to `Al^(3+)`D. an increase from `O^(2-)` to `F^(-)` and then decrease from `Na^(+)` to `Al^(3+)` |
| Answer» Correct Answer - C | |
| 12. |
When `A_(2) and B_(2)` are allowed to react, the equilibrium constant of the reaction at `27^(@)C` is found `(K_(c)=4)`. `A_(2(g))+B_(2(g))hArr2AB_((g))` what will be the equilibrium concentration of AB?A. 1.33 MB. 2.66 MC. 0.66 MD. 0.33 M |
| Answer» Correct Answer - C | |
| 13. |
The pH of 0.004 M hydrazine solution is 9.7. its ionisation constant `(K_(b))` isA. `7.79xx10^(-8)`B. `4.49xx10^(-9)`C. `1.67xx10^(-10)`D. `6.25xx10^(-7)` |
| Answer» Correct Answer - D | |
| 14. |
IUPAC name of ` K_(3)[Fe(C_(2)O_(4))_(3)]` isA. potassium trioxalatoferrate (I)B. potassium tetraoxalatoferrate (III)C. Potassium trioxalatoferrate (III)D. Potassium trioxalatoferrate (II) |
| Answer» Correct Answer - C | |
| 15. |
The vapoour density of a mixture containing `NO_(2)` and `N_(2)O_(4)` is 38.3 at 300 K. the number of moles of `NO_(2)` in 100 g of the mixture is approximatelyA. 0.44B. 4.4C. 33.4D. 3.34 |
| Answer» Correct Answer - A | |
| 16. |
The enthalpy of neutralisation of `NH_(4)OH` and `CH_(3)COOH` is -10.5 kcal `mol^(-1)` and enthalpy of neutralisation of `CH_(3)COOH` with strong base is -12.5 kcal `mol^(-1)`. The enthalpy of ionisation of `NH_(4)OH` will beA. 4.0 kcal `mol^(-1)`B. 3.0 kcal `mol^(-1)`C. 2.0 kcal `mol^(-1)`D. 3.2 kcal `mol^(-1)` |
| Answer» Correct Answer - C | |
| 17. |
An alkane `C_(7)H_(16)` is produced by the reaction of lithium di(3-pentyl)cuprate with ethyl bromide. The name of the product isA. 3-methylhexaneB. 2-ethylpentaneC. 3-ethylpentaneD. n-heptane. |
| Answer» Correct Answer - C | |
| 18. |
In any subshell, the maximum number of electrons having same value of spin quantum number isA. `sqrt(l(l+1))`B. `l+2`C. `2l+1`D. `4l+2` |
| Answer» Correct Answer - C | |
| 19. |
The aqueous solution of potash alum `[K_(2)SO_(4)*Al_(2)(SO_(4))_(3)*24H_(2)O]` is acidic due toA. hydrolysis of `K^+`B. hydrolysis of `Al^(3+)`C. hydrolysis of `SO_(4)^(2-)`D. Presence of acid in its crystal as impurity. |
| Answer» Correct Answer - B | |
| 20. |
Which of the following has highest boiling point ?A. Benzene,B. PhenolC. TolueneD. Ethylbenzene |
| Answer» Correct Answer - B | |
| 21. |
The correct order of equivalent conductance at infinite dilution of LiCI, NaCI and KCI isA. LiCI gt NaCI gt KCIB. KCI gt NaCI gt LiCIC. NaCI gt KCI gt LiCID. LiCI gt KCI gt NaCI |
| Answer» Correct Answer - B | |
| 22. |
White phosphorus when reacts with nitric acid givesA. `H_(4)P_(2)O_(6)`B. `H_(3)PO_(2)`C. `H_(3)PO_(4)`D. `H_(3)PO_(3)` |
| Answer» Correct Answer - C | |
| 23. |
Types of drugs that mimic that natural messenger by switching on the receptor are calledA. antagonistsB. chemical messengersC. receptorsD. agonists |
| Answer» Correct Answer - D | |
| 24. |
Half-life period of a zero order reaction isA. Proportional to initial concentrations of reactantsB. independent of initial concentrations of reactantsC. inversely proportional to initial concentrations of reactionsD. inversely proportional to the square of intioal concentrations of reactants . |
| Answer» Correct Answer - A | |
| 25. |
In which of the following pairs, the hybridisation of central atoms is same, but geometry is not the same?A. `SO_(3),CO_(3)^(2-)`B. `SO_(3)^(2-),NH_(3)`C. `PCl_(5),POCl_(3)`D. `XeF_(2),Icl_(3)` |
| Answer» Correct Answer - D | |
| 26. |
Select correct statement for `BrF_(5)`.A. All fluorine atoms are in same planeB. Four fluorine atoms and Br atom is in same plane.C. Four fluorine atoms are in same planeD. It has all F-Br-F bond angles at `90^(@)`. |
| Answer» Correct Answer - C | |
| 27. |
Which of the following is not the consequence of H-bonding?A. Glycerol is more soluble in water than ethanol.B. Boiling point of `C_(2)H_(5)OH` is higher than `CH_(3)-O-CH_(3)`.C. p-nitrophenol has higher boiling point than o-nitrophenolD. HCl is water soluble due to H-bonding |
| Answer» Correct Answer - D | |
| 28. |
Consider a `P_(y)` orbital of an atom and identify correct statementA. s-orbital of another atom produces `pi`-bond when y is the bond formation axisB. `p_(y)`-orbital of another atom produces `sigma`-bond when x is the bond formation axis.C. `p_(z)`-orbital of another atom produces `pi`-bond when x is the bond formation axis.D. `d_(xy)`-orbital of another atom produces `pi`-bond when x is the bond formation axis |
| Answer» Correct Answer - D | |
| 29. |
Which of the following will have maximum dipole moment?A. B. C. D. |
| Answer» Correct Answer - B | |
| 30. |
Which of the followin will show least dipole character?A. WaterB. EthanolC. EthaneD. Ether |
| Answer» Correct Answer - C | |
| 31. |
Heavy water is used as aA. fuel in enginesB. semiconductorC. moderator in nuclear reactorsD. insulator in steam engines. |
| Answer» Correct Answer - C | |
| 32. |
Indicate the wrongly named compound.A. `underset(("4-Methyl-1-pentanal"))(CH_(3)-underset(CH_(3))underset(|)(C)H-CH_(2))-CH_(2)-CHO`B. `underset(("4-Methylpent-2-yn-1-oic acid"))(CH_(3)-underset(CH_(3))underset(|)(C)H-C-=C-COOH`C. `CH_(3)underset(("2-Methyl-1-pentanoic acid"))(CH_(2)CH_(2)-underset(CH_(3))underset(|)(C)H-COOH)`D. `underset(("Hex-3-en-5-one"))(CH_(3)CH_(2)-CH=CH-overset(O)overset(||)(C)-CH_(3))` |
| Answer» Correct Answer - D | |
| 33. |
The graph of P vs V is given at different temperature The correct relationship isA. `T_(1) gt T_(2) gt T_(3)`B. `T_(1) lt T_(2) lt T_(3)`C. `T_1=T_(2)=T_(3)`D. `T_(2) gt T_(1) gt T_(3)` |
| Answer» Correct Answer - A | |
| 34. |
A sample of gas has a volume of `V_(1)` litre at temperature `t_(1).^(@)C`. When the temperature of the gas is changed to `t_(2).^(@)C` at constant pressure, then the volume of the gas was found to increase by 10%. The percentage increase in temperature isA. 0.1B. `(10+(2730)/(t_(1)))%`C. `20%`D. `(0.1+t_(1)^(-1))%` |
| Answer» Correct Answer - B | |
| 35. |
The signs of `DeltaH,DeltaS and DeltaG` for a non-spontaneous reaction at all temperature would eA. `+,+,-`B. `+,-,+`C. `-,-,-`D. `+,+,+` |
| Answer» Correct Answer - B | |
| 36. |
Which of the following represents the isopolyacid of phosphorus ?A. `{:(" "O" "O),(" "||" "||),(H-P-O-P-O-H),(" "|" "|),(" "O-H" "O-H):}`B. `H - overset(O) overset(||) underset(OH) underset(|)P - overset(O) overset(||)P -underset(OH) underset(|) OH`C. `H-overset(O) overset(||) underset(OH) underset(|)P - O - overset(O) overset(||) underset(H) underset(|)P - H`D. `HO - overset(O) overset(||) underset(OH) underset(|) P -O- overset(O) overset(||) underset(OH) underset(|)P - OH` |
| Answer» Correct Answer - D | |
| 37. |
In an antiflourite structure, cations occupyA. octahedral voidsB. centre of cubeC. tetrahedral voidsD. corners of cube |
| Answer» Correct Answer - C | |
| 38. |
When the temperature is raised, viscosity o the liquid decreases. This is becauseA. volume of the solution decreasesB. increase in temperature increases the average kinetiic energy of the molecules which overcomes the attractive forces between themC. covalent and hydrogen bond forces decreasesD. attraction between the molecule increases. |
| Answer» Correct Answer - B | |
| 39. |
The liquefaction behaviour of temporary gases approacches that of perrmanent gases as we goA. below critical temperatureB. above critical temperatureC. above absolute zeroD. below absolute zero |
| Answer» Correct Answer - B | |