Explore topic-wise InterviewSolutions in Current Affairs.

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.

In which of the following sets, all the properties belong to same category (all extensive or all intensive)

Answer»

MASS, volume, specific heat 
Temperature, PRESSURE, volume 
Heat capacity, DENSITY, entropy
Enthalpy, INTERNAL energy, volume 

Answer :D
Discussion
2.

In which of the following set all molecules have equal bond order?

Answer»

`H_(2),He_(2),B_(2)`
`C_(2),Li_(2),O_(2)`
`H_(2),Li_(2),B_(2)`
`O_(2),H_(2),C_(2)`

ANSWER :C
Discussion
3.

In which of the following Second anion is more stable than First?

Answer»

`O_2N - OVERSET(ODOT)CH_2 and F-overset(odot)CH_2`
`overset(odot)CF_3 and overset(odot)C Cl_3`
`F_3C - overset(odot)CH_2 and Cl_3C - overset(odot)C H_2 `
`CH_3-overset(O)overset(||)C- overset(oplus)CH_2 and H_2N - overset(odot)CH_2`

SOLUTION :d-orbital RESONANCE in `overset(Ɵ)C Cl_3`
Discussion
4.

In which of the following, resonance of -NH_(2) group is possible ?

Answer»

1-Aminobutane
Ethylamine
Benzylamine
p-Toluidine

Solution :Only in p-toluidine (4-methylaniline), the `-NH_(2)` group is directly attached to the BENZENE RING and HENCE resonance is possible.
Discussion
5.

In which of the following representation given below spatial arrangement of group/atom different from that given in structure (a)?

Answer»




Solution :The CARBON of structure (A) is chiral

`therefore A cancel(-=) (a)` Because the position is change (I)
Structure
The (B) is obtain by `120^(@)` ROTATION of (a) at anticlock wise on `C-CH_(3)`
`therefore (a) -= (B)`
(C ) from structure (a)

`therefore (a) cancel(-=) C`
D from structure (a)

`therefore a cancel(-=)(D)`
In three-dimensional the representation of (A), (C ), (D) is differ than (a)
Discussion
6.

In which of the following regions hydrogen and helium are found

Answer»

Stratophere
Mesosphere
troposhere
Exosphere

Solution :`H_(2), He` and IONIC OXYGEN are PRESENTS in exsphere.
Discussion
7.

In which of the following region of atmosphere, lowest tempt!rntures arc observed ?

Answer»

troposphere
stratosphere
measosphere
thermosphere

Answer :C
Discussion
8.

In which or the following region ionisation of gases takes place

Answer»

Troposhere
THERMOSPHERE
LITHOSPHERE
STRATOSPHERE

ANSWER :B
Discussion
9.

In which of the following redox reactions are neither the reactants nor the products favored ?

Answer»

` Co(s) +Ni^(2+) (AQ.)RARR Co^(2+) (aq.) + Ni(s)`
` CU(s) +2Ag^(2+) (aq.) rarr Cu^(2+) (aq.) +2 Ag(s)`
`Zn(s) +Cu^(2+) (aq.) rarr Zn^(2+) (aq.) + Cu(s)`
` Fe(s) +3Cu^(2+) (aq.) rarr 2Fe^(3+) (aq.) + Cu(s)`

SOLUTION :At equlubrium, chemical tests reveal that both `Ni^(2+)` (aq.) and `Co^(2+) (aq)` are pesent at moderate concentrations.
Discussion
10.

In which of the following reation meta substitution product predominate

Answer»




Solution :EDG attaches to BENZENE ring gives O,P directing PRODUCT.
EWG attaches to benzene ring gives M directing product.
Discussion
11.

In which of the following rearrangement is not possible ?

Answer»

`(CH_(3))_(3)overset(oplus)(C)-CH_(2)-O-CH_(3)`
`CH_(2)=CH-CH_(2)-CH_(2)^(oplus)`
`C_(6)H_(5)CH_(2)overset(oplus)(C)H_(2)`

SOLUTION :Which is not possible of REARRANGEMENT In re arrangement is not possible
Discussion
12.

In which of the following reactions, the underlined substance has been reduced ?

Answer»

`UNDERLINE(CO) + CuO rarr CO_(2) + Cu`
`underline(CuO) + 2HClrarrCuCl_(2) + H_(2)O`
`underline(4H_(2)O_((g)))+ 3Ferarr 4H_(2(g)) + Fe_(3)O_(4)`
`underline(C ) + 4HNO_(3) rarr CO_(2) + 2H_(2)O + 4NO_(2)`

Answer :C
Discussion
13.

In which of the following reactions, the underlined substance has been oxidised?

Answer»

`underline(Br_(2))+ H_(2)S RARR 2HBR + S ` <BR>`underline(2HgCl_(2)) + SnCl_(2) rarr Hg_(2) Cl_(2) + SnCl_(4)`
`Cl_(2) + underline(2KI) rarr2KCl + I_(2)`
`underline(2CU^(2+))+ 4I^(-) rarr Cu_(2) I_(2) + I_(2)`

Answer :C
Discussion
14.

In which of the following reactions, the equilibrium remains unaffected on addtion of small amount of argon at constant volume ?

Answer»

`H_(2) (g) + I_(2) (g) hArr 2 HI (g)`
`PCl_(5)(g) hArr PCl_(3) (g) + Cl_(2) (g)`
`N_(2) (g) + 3 H_(2)(g) hArr 2 NH_(3) (g)`
The equilibrium will REMAIN unaffected in all the three cases.

Solution :On adding inert GAS at CONSTANT volume to any equilibrium, it remains unaffected.
Discussion
15.

In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume ?

Answer»

`H_(2(g)) + I_(2(g)) hArr 2HI_((g))`
`PCl_(5(g)) hArr PCl_(3(g)) + Cl_(2(g))`
`N_(2(g)) + 3H_(2(g)) hArr 2NH_(3(g))`
The EQUILIBRIUM will remain unaffected in all the THREE cases.

Solution :In above reactions, at constant volume
`H_(2(g)) + I_(2(g)) hArr 2HI_((g))`
`PCl_(5(g)) hArr PCl_(3(g)) +Cl_(2(g))`
`N_(2(g)) + 3H_(2(g)) hArr 2NH_(3(g))`
The equilibrium constant (K) remains unaffected on addition of INERT gas in all the three cases.
Discussion
16.

In which of the following reactions the correct major products are mentioned

Answer»




ANSWER :B::C
Discussion
17.

In which of the following reactions the correct product is given?

Answer»




SOLUTION :a) should be ANTI markovinikar ADDITION.
Discussion
18.

In which of the following reactions, tertaryt butyl benzene is formed ?

Answer»




all of these

Answer :d
Discussion
19.

In which of the following reactions, standard reaction entropy change (DeltaS^(@)) is positive and standard Gibb's energy change (DeltaG^(@)) decreases sharply with increasing temperature?

Answer»

`C ("graphite") + 1/2O_(2)(g) to CO(g)`
`CO(g) + 1/2 O_(2)(g) to CO_(2)(s)`
`Mg_(s) + 1/2O_(2)(g) to MGO(s)`
`1/2C("graphite") + 1/2 O_(2)(g) to 1/2 CO_(2)(g)`

Solution :`C(GR) + 1/2O_(2)(g) to CO(g)`
Since `DeltaN_(g) = 1- 1/2 = + ve`
`DeltaS = + ve`
`DELTAG = DeltaH -TDeltaS`
Since `DeltaS` is + ve, increase in TEMPERATURE will make `TDeltaS` more negative and `DeltaG` will decrease with increasing temperature.
Discussion
20.

In which of the following reactions, SN^2 rate increases on changing the solvent from (95 % acetone + 5 % H_2 O) to (80 % acetone + 20 % H_2O) ?

Answer»

`Me_2 - OVERSET (oplus) P- Me + NH_3 rarr Me overset (oplus) N H_3 + Me_2 P`<BR>`MEI + PH_3 rarr Me overset (oplus) P H_3 + I^(Ө)`
`MeBr + overset (Ө) O H rarr MEOH + Br^(Ө)`
`Me_2 - overset (oplus) S - Me + overset (Ө)OH rarr MeOH + Me_2 S`

Answer :B
Discussion
21.

In which of the following reactions phenol is not obtained:

Answer»




SOLUTION :N//A
Discussion
22.

In whichof the following reactions, no change in gaseous volume occurs when measured at similar T and P?

Answer»

COMBINATION of `N_(2)andO_(2)` to give NO
Combination of `N_(2)andH_(2)` to form `NH_(3)`
Combustion of CARBON to give `CO_(2)`
Combustion of carbon monoxide

Solution :`underset("1vol")(N_(2))+underset("1vol")(O_(2))rarrunderset("2vol")(2NO)`
`C_((s))+underset("1 vol")(O_(2(g)))rarrunderset("1 vol")(CO_(2(g))`
Discussion
23.

In which of the folowing rection nitrogen is not reduced ?

Answer»

`NO_(2) rarr NO_(2)^(+)`
`NO_(3)^(-) rarr NO`
`NO_(3)^(-) rarr NH_(4)^(+)`
`NH_(4)^(+) rarr N_(2)`

Answer :D
Discussion
24.

In which of the following reactions, MgO is not formed

Answer»

`Mg+CO_2to`
`Mg+Noto`
`Mg+dil.HNO_3to`
`Mg+B_2O_3to`

ANSWER :C
Discussion
25.

In which of the following reactions, MgO is not formed?

Answer»

`Mg+CO_(2)rarr`
Mg + dil. `HNO_(3)rarr`
`Mg + NO rarr`
`Mg + B_(2)O_(3)rarr`

SOLUTION :Mg can form MGO only with `CO_(2), No and B_(2)O_(3)`
Discussion
26.

In which of the following reaction(s), major product is formed by the rearrangement of reactiveintermediate?

Answer»




SOLUTION :
(b) The REACTION involves CYCLIC bromonium ion, no REARRAGEMENT .
(c) The reaction involvescyclic mercurinium ion, no rearragement.
Discussion
27.

In which of the following reactions is K_(p)ltK_(c)?

Answer»

`CO_(G)+CI_(2)(g)hArrCOCI_(2)(g)`
`CH_(4)(g)+H_(2)O(g)hArrCO(g)+3H_(2)(g)`
`2BrCI(g)hArrCI_(2)(g)+Br_(2)(g)`
`I_(2)(g)hArr2I(g)`

Solution :N//A
Discussion
28.

In which of the following reactions, hydrogen peroxide acts as an oxidising agent ?

Answer»

`I_2+H_(2)O_(2)+2OH^(-)to 2I^(-)+2H_(2)O+O_(2)`
`PbS+4H_(2)O to PbSO_(4)+4H_(2)O`
`2MnO_(4)^(-)+3H_(2)O_(2) to 2MnO_(2)+3O_(2)+2H_(2)O+2OH^(-)`
`HOCI+H_(2)O_(2)toH_(2)O^(+)+CI^(-)+O_(2)`.

ANSWER :B::D
Discussion
29.

In which of the following reactions heat liberated is known as standard heat of formation of CO_(2)?

Answer»

`2CO _((G)) + O _(2 (g)) to 2 CO _(2 (g)) + 135 . 6 ` kcals
`C _(("diamond")) + O _(2 (g)) to CO _(2 (g)) + 94.5 ` kcals
`C _(("grphite")) + O _(2 (g)) to CO _(2 (g)) + 94.05` kcals
`CH _(4 (g)) + 2 O _(2 (g)) to 2 CO _(2 (g)) + 2 H _(2 (g)) + 2 H_(2(L )) + 2128` ikcals

Answer :C
Discussion
30.

In which of the following reactions, H_(2)O_(2) is acting as a reducing agent?

Answer»

`SO_(2) + H_(2)O_(2) to H_(2)SO_(4)`
`2Kl + H_(2)O_(2) to 2KOH + I_(2)`
`PbS + 4H_(2)O_(2) to PbSO_(4) + 4H_(2)O`
`Ag_(2)O + H_(2)O_(2) to 2AG + H_(2)O + O_(2)`

Solution :When `H_(2)O_(2)` ACTS as a reducing AGENT, `O_(2)` is always produced , i.e., option (d) is CORRECT.
Discussion
31.

In which of the following reactions H_(2)O_(2)does not act as an reducing agent ?

Answer»

`I_(2)+H_(2)O_(2)+2OH^(-) to 2I^(-) +2H_(2)O+O_(2)`
`PbS+4H_(2)O_(2) to PbSO_(4) +4H_(2)O`
`2KMnO_(4)+3H_(2)O_(2) to 2MnO_(2) +2KOH +2H_(2)O+3O_(2)`
`HOCl+H_(2)O_(2) to H_(3)O^(+) +CL^(-)+O_(2)`

Solution :
Oxygen of `H_(2)O_(2)` (-1) is coverted to (-2) of `H_(2)O`. There is reduction. `H_(2)O_(2)` is oxidising agent.
(A), (B), (D) : `underset(2(-1))underset(""darr)(H_(2)O_(2))to underset(2(O))underset(UARR)(O_(2))+2e`...Oxidation
Discussion
32.

In which of the following reactions H_(2)O_(2) acts as reducing agent? (I) H_(2)O_(2)+2H^(+)+2e^(-) to 2H_(2)O (II) H_(2)O_(2)-2e^(-) to O_(2)+2H^(+) (III) H_(2)O_(2)+2e^(-) to 2OH^(-) (IV) H_(2)O_(2)+2OH^(-)-2e^(-) to O_(2)+2H_(2)O

Answer»

SOLUTION :(d) `H_(2)O_(2)` acts as a reducing agent in both these REACTIONS.
Discussion
33.

In which of the following reactions H_(2)O_(2) does not act as a reducing agent ?

Answer»

`I_(2)+H_(2)O_(2)+2OH^(-)to2I^(-)+2H_(2)O+O_(2)`
`PbS+4H_(2)O_(2)toPbSO_(4)+4H_(2)O`
`2KMnO_(4)+3H_(2)O_(2)to2MnO_(2)+2KOH+2H_(2)O+3O_(2)`
`HOCl+H_(2)O_(2)toH_(3)O^(+)+CL^(-)+O_(2)`

Solution :(i) In reaction (A), ( C) and (D), `H_(2)O_(2)` is converted into `O_(2)`.

`thereforeH_(2)O_(2)` is reducing agent.
(ii) In reaction (B) `H_(2)O_(2)` is converted to `H_(2)O`.

Here reduction of `H_(2)O_(2)` occurs to `H_(2)OandH_(2)O_(2)` is an oxidising agnet.
Discussion
34.

In which of the following reaction(s) H_(2)O_(2) can convert the underlined atom into the prodit with idon =+6 ?

Answer»

`CrCl_3 + H_2O_2+OH^(-) to `
`K_2Cr_2 O_7 +H_2O_2 +H_2SO_4 to `
`SO_2 + H_2O_2 + OH^(-) to `
`H_2O_2+ Na_3 AsO_3+ OH^(-) to `

SOLUTION :A) `CrCl_3 to Na_2 CrO_4`
B) `K_2 Cr_2O_7 to CrO_5`
C) `SO_2 to SO_4^(-)`
Discussion
35.

In which of the following reactions H_(2)O_(2) acts as reducing agent?

Answer»

`H_(2)O_(2)+SO_(2) to H_(2)SO_(4)`
`2Kl+H_(2)O_(2) to 2KOH+I_(2)`
`PbS+4H_(2)O_(2) to PbSO_(4)+4H_(2)O`
`Ag_(2)O+H_(2)O_(2) to 2Ag+H_(2)O+O_(2)`

Solution :(d) `Ag_(2)O` is reduced to AG
Discussion
36.

In which of the following reactions, H_(2)O_(2) acts as oxidising agent ?

Answer»

`Cl_(2)+H_(2)O_(2)to2HCl+O_(2)`
`Ag_(2)O+H_(2)O_(2)to2Ag+H_(2)O+O_(2)`
`2NaOH+H_(2)O_(2)toNa_(2)O_(2)+2H_(2)O`
`KNO_(2)+H_(2)O_(2)toKNO_(3)+H_(2)O`

ANSWER :D
Discussion
37.

In which of the following reactions H_(2)O_(2) acts as a reducing reagent ?

Answer»

`PbS_((s))+4H_(2)O_(2(AQ)) overset(H^(+))(rarr)PbSO_(4(s))+H_(2)O(l)`
`HOCl+H_(2)O_(2) overset(H^(+))(rarr) H_(3)O^(+)+ Cl^(-1)+O_(2)`
`Mn^(2+)+H_(2)O_(2) overset(OH^(-))(rarr) Mn^(4+)+2OH^(-)`
`2Fe^(2+)+H_(2)O_(2) overset(OH^(-))(rarr) 2Fe^(3+)+2OH^(-)`

Answer :B
Discussion
38.

In which of the following reactions, H_(2)O_(2) acts as a reducing reagent?

Answer»

`PbO_(2(s))+H_(2)O_(2(aq)) rarr PbO_((s))+H_(2)O_((l))+O_(2(g))`
`Na_(2)SO_(3(aq))+H_(2)O_(2(aq)) rarr Na_(2)SO_(4(aq))+H_(2)O_((l))`
`2KI_((aq))+H_(2)O_(2(aq)) rarr 2KOH_((aq))+I_(2(s))`
All the above

Answer :A
Discussion
39.

In which of the following reactions, H_(2)O_(2) acts as a reducing reagent ?

Answer»

`PbS_((s))+4H_(2)O_(2(aq))overset(H^(-))(to)PbSO_(4(s))+4H_(2)O_((L))`
`HOCl+H_(2)O_(2)overset(H^(-))(to)H_(3)O^(+)+Cl^(-)+O_(2)`
`MN^(2+)+H_(2)O_(2)overset(HO^(-))(to)Mn^(4+)+2OH^(-)`
`2Fe^(2+)+H_(2)O_(2)overset(OH^(-))(to)2Fe^(3+)+2OH^(-)`

Answer :B
Discussion
40.

In which of the following reactions, H_(2)O_(2) acts as a reducing agent? (i) H_(2)O_(2) + 2H^(+) + 2e^(-) to 2H_(2)O (ii) H_(2)O_(2) -2e^(-) to O_(2) + 2H^(+) (iii) H_(2)O_(2)+ 2e^(-) to 2OH^(-) (iv) H_(2)O_(2) + 2OH^(-) 2e^(-) to O_(2) + 2H_(2)O

Answer»

(II) and (iv)
(i) and (ii)
(III) and (iv)
(i) and (iii)

Solution :`O_(2)` is evolved in reactions agent, `O_(2)` is ALWAYS produced , i.e., option (d) is correct
Discussion
41.

In which of the following reactions H_2O_2 acts as a reducing agent ? (i)H_2O_2 + 2H^(+) + 2bare to 2H_2O (ii)H_2O_2 - 2bare to O_2 + 2H^+ (iii) H_2O_2 + 2bare to 2OH^- (iv)H_2O_2 + 2OH^(-) - 2bare to O_2 + 2H_2O

Answer»

(iii),(IV)
(i),(iii)
(II),(iv)
(i),(ii)

Solution :These two REACTIONS are oxidation.
(ii)`{:(H_2O_2-2bare,to, O_2+2H^(+)),(DARR,,uarr),((-1),OVERSET"Oxidation"to,(0)):}`
(iv)`{:(H_2O_2 + 2OH^(-)- 2bare , to, O_2 + 2H_2O),(darr, , darr),((-1),overset"Oxidation"to ,0):}`
Discussion
42.

In which of the following reactions H_(2)O_(2) acts as a reducing agent?

Answer»

I and II
III and IV
I and III
II and IV

Solution :In both of these reaction,`H_(2)O_(2)` ACTS as a reducing agent SICE it releases electrons
Discussion
43.

In which of the following reactions H_(2)O_(2) acts as a reducing agent? 1. H_(2)O_(2)+2H^(+)+2e^(-)to2H_(2)O 2. H_(2)O_(2)-2e^(-)toO_(2)+2H^(+) 3. H_(2)O_(2)+2e^(-)to2OH^(-) 4. H_(2)O_(2)+2OH^(-)-2e^(-)toO_(2)+2H_(2)O

Answer»

1,2
3,4
1,3
2,4

Answer :D
Discussion
44.

In which of the following reactions does hydrogen acts as an oxidisng agent?

Answer»

`H_(2)+Na rarr`
`CH_(2)=CH_(2)+H_(2) rarr`
`PbO_(2)+H_(2)`
`F_(2)+H_(2) rarr`

Solution :Oxidation state of hydrogen changes from 0 to -1. Thus, it acts as an oxidising agent
`2Na+H_(2)^(0) rarr 2overset(+)(N)AOVERSET(-)(H)`
Discussion
45.

In which of the following reactions correct major product is given ?

Answer»




ANSWER :A::B::C
Discussion
46.

Which of the following reactions, aromatic characters retained ?

Answer»

`C_6H_6 OVERSET(H_2//Ni)to`
`C_6H_6 UNDERSET(ZN// H_2O)overset(O_3)to Y`
`C_6H_6 underset(AlCl_3)overset(CH_3COCl)to Q `
`C_6H_6 underset(hv)overset(Cl_2)toR `

SOLUTION :
Discussion
47.

In which of the following reactions , aromatic characters is retained ?

Answer»

`C_6H_6overset(H_(2)//Ni)RARRX`
`C_6H_6overset(O_3)underset(Zn//H_2O)RARR`
`C_6H_6overset(CH_3COCl)underset(AlCl_3)rarr`
`C_6H_6overset(Cl-2)underset("light")rarrR`

ANSWER :C
Discussion
48.

In which of the following reactions and products are correctly matched ?

Answer»

`F_3C-CH=CH_2+HCl to F_3C-undersetunderset(CL)(|)CH-CH_3`
`CH_3-CH=CH-oversetoverset(O)(||)C-OCH_3+IC l to CH_3-undersetunderset(Cl)(|)CH-undersetunderset(I)(|)CH-oversetoverset(O)(||)C-OCH_3`
`C_6H_5CH=CHCH_3+HBr overset(ROOR)to C_6H_5CH_2-undersetunderset(Br)(|)CH-CH_3`

ANSWER :B::C::D
Discussion
49.

In which of the following reactions, aromatic character is observed in the product formed ?

Answer»

`C_6H_6 OVERSET(H_2//N i)(rarr)X`
`C_6H_6 UNDERSET(hv)overset(Cl_2)(rarr)Y`
`C_6H_6 underset(FeCl_3)overset(Cl_2)(rarr)Q`
`C_6H_6 underset(Zn, H_2O)overset(O_3)(rarr)Z`

ANSWER :C
Discussion
50.

In which of the following reactions, antiMarkownikoff's rule is observed?

Answer»

`CH_(3)-CH=CH_(2)+HCloverset("Peroxide")rarr `
`CH_(3)-CH=CH_(2)+HBroverset("Peroxide")rarr `
`CH_(3)-CH=CH_(2)+HIoverset("Peroxide")rarr `
`CH_(3)-C=CH_(2)+H_(2)SO_(4) rarr `

ANSWER :B
Discussion