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.

Identify the correct statement for change of Gibb's energy for a system (Delta G_(system)) at constant temperature and pressure :

Answer»

If `Delta G_(SYSTEM) = 0`, the system has ATTAINED equilibrium
If `Delta G_(system) = 0`, the system is still moving in a PARTICULAR direction
If `Delta G_(system) LT 0`, the process is not spontaneous
If `Delta G_(system) GT 0`, the process is spontaneous

Answer :A
Discussion
2.

Identify the correct statement about the reaction -

Answer»

it is a SYN - eliminiation reaction and GIVES cis alkene
it is an anti-ELIMINATION reaction and gives trans alkene
it is a syn - elimination reaction and gives Trans alkene
the product does not CONTAIN deuterium

Answer :C
Discussion
3.

Identify the correct statement about reaction and products

Answer»

Product A and C are isomers.
Product A and C are Identical.
CONVERSION of B to product C is via E2 MECHANISM.
Conversion of A to product B is nucleophilic ADDITION reaction.

Answer :B
Discussion
4.

Identify the correct set of stereochemical relationships amongst the following monosaccharides I-IV

Answer»

I and II are anomers, III and IV are EPIMERS
I and II are epimers, III and IV are anomers
I and III are anomers , I and II are epimers
I and III epimers, II and IV are anomers

Solution :(I) and (III) are anomers because they have change of CONFIGURATION only at anomeric carbon.
(I) and (II) are epimers because they have change of configuration at a carbon other than anomeric.
Discussion
5.

Identify the correct sequence of increasing number of pi-bonds in the structure of the following molecules: (I)H_(2)S_(2)O_(6)(II)H_(2)S_(2)O_(3)(III)H_(2)S_(2)S_(5)

Answer»

I, II and III
II, I and III
II, III and I
I, III and II

Solution :`underset(I)(OH-OVERSET(O)overset(||)underset(O)underset(||)(S)-overset(O)overset(||)underset(O)underset(||)(S)-OH)``underset(II)(OH-overset(O)overset(||)underset(O)underset(||)(S)-OH)``underset(III)(HO-overset(O)overset(||)underset(O)underset(||)(S)-overset(O)overset(||)underset(..)(S)-OH`
Discussion
6.

Identify the correct sequence of increasing number of pi- bonds in the structures of the following molecules. I. H _(2) S_(2) O_(6) II. H_(2)SO_(3) III. H_(2)S_(2) O_(5)

Answer»

I, II, III
II, III, I
II, I, III
I, III, II

Answer :B
Discussion
7.

Identifythe correctreasonforlanthanidecontraction

Answer»

Decreasingnuclearcharge
Decreasingsecreeningeffect
Increasingnuclearcharge
Negligiblescreeningeffect

ANSWER :D
Discussion
8.

Identify the correct reactivity order of S_(N)1 reaction :

Answer»

`(iii)gt(ii)gt(i)`
`(i)gt(ii)gt(iii)`
`(i)gt(iii)gt(ii)`
`(i)gt(ii)gt(iii)`

Solution :Carbocation is STABILIZED by + M EFFECT. - NH group shows greater + M effect due to LESS electronegativity of NITROGEN.
Discussion
9.

Identify the correct rate of hydrolysis.

Answer»

igtiigtiii
iigtiiigti
igtiiigtii
iigtigtii

Answer :A
Discussion
10.

Identify the correct pathway to convert propanoic acid to ethylamine. The reagent represented by A, B and C are CH_(3)CH_(2)COOH overset(A)rarr X overset(B)rarr Y overset(C )rarr CH_(2)CH_(2)NH_(2)

Answer»

`{:(A,B,C),(CA(OH)_(2),"Heat",Pt//H_(2)):}`
`{:(A,B,C),(SOCl_(2),NH_(3),Br_(2)//KOH):}`
`{:(A,B,C),(HNO_(2),P+I_(2),LiAlH_(4)):}`
`{:(A,B,C),(HCN,NH_(3),Br_(2)//KOH):}`

Answer :B
Discussion
11.

Identify the correct oreder of boiling points of the following compounds : {:(underset((1))(CH_(3)CH_(2)CH_(2)CH_(2)OH)""underset((2))(CH_(3)CH_(2)CH_(2)CHO)),(underset((3))(CH_(3)CH_(2)CH_(2)COOH)):}

Answer»

`1gt2gt3`
`3gt1gt2`
`1gt3gt2`
`3gt2gt1`

ANSWER :B
Discussion
12.

Identify the correct order of wavelength of light absorbed for the following complex ions. underset(I)([Co(H_2O)_6]^(3+)) , underset(II)(Co(CN)_6]^(3-) underset(III)([Co(l)_6]^(3-)) ,underset(IV)([Co(en)_3])

Answer»

IIIgtIgtIVgtII
IIgtIVgtIgtIII
IIIgtIgtIIgtIV
IgtIIIgtIVgtII

Solution :`Delta` corresponds to the wave LENGTH of the visible light and `Delta=(hc)/lambda`
The order of ability to produce d-orbital splitting of various lignads:
`COgtCN^(-)gtNO_2^(-) GT en gt NH_3 gt H_2O gt OH^(-) gt F^(-) gt CL^(-) gt Br^(-) gt I^(-)`
`{:("STRONG field","WEAK field"),("ligands","ligands"),(("larger" Delta),("smaller" Delta))`
Discussion
13.

Identify the correct order solubilityin apocous medium

Answer»

`Na_(2)S GT CuS gt ZnS`
`Na_(2)S gt ZuS gt CuS`
`ZnS gt Na_(2)S gt CuS `
`Na_(2)S gt CuS gt ZnS`

Solution :Higher the `K_(sp)` of sulphides more is thesolubility in aqueous medium
In the salt analysis `K_(sp)` sulphidesincreases FROMGROUP `1` of saltanlysis to group `IV` of saltanlysis `Cu^(+2)` ion is in group II whereas `Zn^(+2)` is INGROUP IV of saltanalysis
`:.` Solubility of `ZnS gt CuS`
since the `K_(sp)` of sulphides of sodiumis the bighest therefore it ishighlysoluble
Hence the answer is (B) i.e.solubility of `Na_(2)S gt ZnS CuS`
Discussion
14.

Identify the correct order of solubility of Na_(2)S,CuS and ZnS in aqueous solution

Answer»

CuSgtZnSgt`Na_(2)S`
`ZnS gt Na_(2)S gt CuS`
`Na_(2)S gt CuS gt ZnS`
`Na_(2)S gt ZnS gt CuS`

Solution :Sodium SALTS are highly soluble. `Cu^(2+)` belongs to the `II^(nd)` group in SALT ANALYSIS and is precipitated as `CuS`, whereas `Zn^(2+)` belongs to the IV group and is precipitated as ZnS
after CuS because of higher `K_(SP)` of `ZnS`.
Discussion
15.

Identify the correct order of the acidic strength:

Answer»

METHANOL`GT` PHENOL `gt H_(2)O`
`H_(2)OGT` Methanol`gt` Phenol
Phenol`gt H_(2)O gt` Methanol
`H_(2)Ogt` Phenol `gt` Methanol

Solution :Phenol`gt H_(2)O gt` Methanol
Discussion
16.

Identify the correct order of solubility of Na_(2)S, CuS and ZnS in aqueous medium

Answer»

`CUS gt ZnS gt Na_(2)S`
`ZnS gt Na_(2)S gt CuS`
`Na_(2)S gt CuS gtZnS`
`Na_(2)S gt ZnS gt CuS`

SOLUTION :No salts are highly soluble.
Hence,(D) is the correct ANSWER.
Discussion
17.

Identify the correct order of solubility of Na_2S, CuS and ZnSin aqueous medium :

Answer»

`CuS gt ZnS gt Na_2S`
`ZnS gt Na_2S gt CuS`
`Na_2S gt CuS gt ZnS`
`Na_2S gt ZnS gt CuS`.

Solution :`K_(sp)` of Cus is LESS than Zns and therefore ZnS is more soluble.
The sodium salts are HIGHLY SOLUBLEIN water .
Discussion
18.

Identify the correct order of solubility in aqueous medium…..

Answer»

`Na_(2)S gt CUS gt ZNS`
`Na_(2)S gt ZnS gt CuS`
`CuS gt ZnS gt Na_(2)S`
`ZnS gt Na_(2)S gt CuS`

Solution :The `K_(sp) (ZnS)` is LARGER than `K_(sp)` [CuS]
Discussion
19.

Identify the correct order of solubility in aqueous medium :

Answer»

`Na_(2)S GT ZNS gt CuS`
`CuS gt ZnS gt Na_(2)S`
`ZnS gt Na_(2)S gt CuS`
`Na_(2)S gt CuS gt ZnS`

Answer :A
Discussion
20.

Identify the correct order of solubility of Na_(2)S, CuS and ZnS in aqueous medium :

Answer»

`Na_2S GT CUS gt ZNS`
`Na_2S gt Zns gt Cus`
`Cus gt Zns gt Na_2S`
`ZnS gt Na_2S gt CuS`

ANSWER :B
Discussion
21.

Identify the correct order of reactivity of the following towards the nucleophilic substitution

Answer»

1 GT 3 gt 2 gt 4 
4 gt 3 gt 2gt 1
3 gt 1 gt 4 gt 2 
2 gt 3 gt 4 gt 1 

ANSWER :A
Discussion
22.

Identify the correct order of size of the following

Answer»

`Ca^(2+) LT K^(+)lt AR lt CL^(-)ltS^(2-)`
`Ar lt Ca^(2+) lt K^(+) lt Cl^(-) lt S^(2-)`
`Ca^(2+) lt Ar lt K^(+) ltCl^(-) lt S^(2-)`
`Ca^(2+) lt K^(+) lt Ar lt S^(2-) lt Cl^(-)`

Answer :A
Discussion
23.

Identify the correct order of oxidizing strength:

Answer»

`VO_(2)^(+) GT Cr_(2)O_(7)^(2-) gt MnO_(4)^(-)`
`MnO_(4)^(-) gt VO_(2)^(+) gt Cr_(2)O_(7)^(2-)`
`Cr_(2)O_(7)^(2-) gt MnO_(4)^(-) gt VO_(2)^(+)`
`MnO_(4)^(-) gt Cr_(2)O_(7)^(2-) gt VO_(2)^(+)`

Answer :D
Discussion
24.

Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds.

Answer»

`1 gt 2 gt 3 gt 4`
`4 gt 3 gt 2 gt 1`
`2 gt 1 gt 3 gt 4`
`2 gt 3 gt 1 gt 4`

Answer :C
Discussion
25.

Identify the correct order of boiling points of the following compounds: CH_(3)CH_(2)CH_(2)CH_(2)OH(1), CH_(3)CH_(2)CH_(2)CHO(2), CH_(3)CH_(2)CH_(2)COOH (3)

Answer»

1gt2gt3
3gt1gt2
1gt3gt2
3gt2gt1

Answer :B
Discussion
26.

Identify the correct order of ionic radii

Answer»

`TI^(2+) gt V^(2+) gt Cu^(2+) gt ZN^(2+)`
`V^(2+) gt Ti^(2+) gt Cu^(2+) gt Zn^(2+)`
`V^(2+) gt Ti^(2+) gt Zn^(2+) gt Cu^(2+)`
`Ti^(2+) gt V^(2+) gt Zn^(2+) gt Cu^(2+)`

Answer :D
Discussion
27.

Identify the correct order of boiling points :

Answer»

PROPANE `LT` METHOXYMETHANE`lt` FLUOROETHANE `lt` ETHANOL
Propane `lt` Fluoroethane `lt` Methoxymethane `lt` Ethanol
Methoxymethane `lt` Propane `lt` Fluoroethane `lt` Ethanol
Fluoroethane `lt` Methoxymethanel `lt` Ethanol `lt` Propane

Solution :Propane `lt` Fluoroethane `lt` Methoxymethane `lt` Ethanol
Discussion
28.

Identify the correct order of acidic strengths of CO_(2),CuO,CaOandH_(2)O :

Answer»

`CaOltCuOltH_(2)OltCO_(2)`
`H_(2)OltCuOltCaOltCO_(2)`
`CaOltH_(2)OltCuOltCO_(2)`
`H_(2)OltCO_(2)ltCaOltCuO`

Solution :`H_(2)O` is NEUTRAL oxide, `CO_(2)` (non-METALLIC oxide is acidic) while metallic oxides (CAO and CuO) are basic. However, oxides of ALKALINE EARTH metals are more basic than oxides of transition metals. Thus, the correct of acidic strength is
`CaOltCuOltH_(2)OltCO_(2)`
Discussion
29.

Identify the correct order of acidic strength.

Answer»

HIO gt HBrO gt HCIO
HCIO gt HBrO gt HIO
HBrO gt HCIO gt HIO
HBrO gt HIO gt HCIO

Solution :ACIDIC strength decreases with the DECREASE in ELECTRONEGATIVITY of CENTRAL atom.
Discussion
30.

Identify the correct method for the synthesis of the compound shown below from the following alternatives.

Answer»




SOLUTION :
Discussion
31.

Identify the correct order :

Answer»

<P>`[V(CO)_(6)]^(-) lt [CR(CO)_(6)]`(C-O bond length order )
`H_(2) lt He` (Boiling point order)
`NH_(2)^(-) gt H_(2)O` (Bond angle order)
All are correct

Solution :
`H_(2)OgtNH_(2)^(-)`
(Bond angle)
(b) B. P. of `H_(2) gt He`, due to greater surface area of `H_(2)`
(a) C-O B. L. order `[V(CO)_(6) ]^(-) gt [Cr (CO)_(6)]`
Discussion
32.

Identify the correct option :-

Answer»

`NO_(3)^(-) gt NH_(3) gt NH_(2)^(-)` (order of bond angle)
`(CH_(3))_(3)` B is a planar MOLECULE
In `NH_(4)Cl`, .N. ATOM is in `sp^(3)d` Hybridisation
`BF_(3) lt BCl_(3) lt B Br_(3) lt BI_(2)` (Order of bond angle)

Solution :(i) `underset(sp^(2))(NO_(3)^(-)) gt underset("1 lp")underset(sp^(3))(NH_(3)) gt underset("2 lp")underset(sp^(3))(NH_(2)^(-))` (B.A. order)
(ii) In `(CH_(3))_(3)` B hyb. of carbon is `sp^(3)` (non planar)
(III) `NH_(4)Cl to NH_(4)^(+)Cl^(-)` in `NH_(4)^(+)` hyb. of N is `sp^(3)`
(iv) In `s_(8)` molecule TOTAL 16 lp or 32 non bonded `e^(-)`
Discussion
33.

Identify the correct match of monosaccharide to the characteristics of the monosaccharide described: {:("(i) Open-chain form is an aldopentose","(ii) Open-chain form is a ketohexose "),("(iii) D-glucose","(iv) A glycoside"):}

Answer»

(a)-(II), (b)-(iii), (C)-(iv), (d)-(i)
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

SOLUTION :`{:("a - Aldohexose, D-glucose","b - Aldohexose, glycoside "),("c – Aldopentose","d - Ketohexose"):}`
Discussion
34.

Identify the correct match '(## AAK_MCP_03_NEET_CHE_E03_019_Q001 ##)'

Answer»

a(iv), B(i), C(ii), d(iii)
a(ii), b(i), c(iv), d(iii)
a(iv), b(iii), c(ii), d(i)
a(ii), b(iii), c(iv), d(i)

ANSWER :A
Discussion
35.

Identify the correct match

Answer»

LEACHING : Ag and Au
Hydralauic washing : SULPHIDE ores
Froth floatation : OXIDE and carbonate ores
Magnetic SEPERATION : Silicates

Answer :1
Discussion
36.

Identify the correct IUPAC name of the compound : CH_(3)CH_(2)CH_(2)CH_(2)CN

Answer»

BUTYL CYANIDE
Butanenitrile
Pentaneitrile
Pentyl cyanide.

ANSWER :C
Discussion
37.

Identify the correct IUPAC name.

Answer»

2,2-Dimethyl-4-ethyl heptane
5-Ethyl-2-methyl hexane
1,3-Dimetnyl butane
3-Etyl-1, 1-dimetyl cyclohexane

Answer :D
Discussion
38.

Identify thecorrectcompoundin eachcase (a) FourstereoisomericcompoundsC_(4) H_(8)Oall opticallyactivecontainno doublebondsand evolvea gaswhentreatedwith CH_(3)Mgl (b) Acompoundbelievedto beeithercyclohexyl methyl etheror 2-methylcyclohexanolevolvesa gaswhentreatedwith NaH .

Answer»

SOLUTION :
Discussion
39.

Identify the conjugate acid base pair for the following reaction in aqueous solution (i) HS^(-)(aq)+HF iff F^(-)(aq)+H_(2)S(aq) (ii) HPO_(4)""^(2-)+SO_(3)""^(2-) iff PO_(4)""^(3-)+HSO_(3)""^(-) (iii) NH_(4)""^(+)CO_(3)""^(2-) iff NH_(3)+HCO_(3)""^(-)

Answer»

Solution :(i)
`*` HF and `F^(-), HS^(-) " and "H_(2)S` are two conjugate acid - base pairs.
`* F^(-)` is the conjugate base of the acid HF (or) HF is the conjugate acid of `F^(-)`.
`* H_(2)S` is the conjugate acid of `HS^(-)" (or) "HS^(-)` is the conjugate base of `H_(2)S`.
(ii)
`* HPO_(4)""^(2-)" and "PO_(4)""^(3-), SO_(3)""^(2-)" and "HSO_(3)""^(-)` are two conjugate acid - base pairs.
`* PO_(4)""^(3-)` is the conjugate base of the acid `HPO_(4)""^(2-)` (or)
`" "HPO_(4)""^(2-)` is the conjugate acid of `PO_(4)""^(3-)`.
`* HSO_(3)""^(-)` is the conjugate acid of `SO_(3)""^(2-)" (or) "SO_(3)""^(2-)` is the conjugate base of `HSO_(3)""^(-)`.
(iii)
`* NH_(4)""^(+)" and "NH_(3), CO_(3)""^(2-)" and "HCO_(3)""^(-)` are two conjugate acid - base pairs.
`*HCO_(3)""^(-)` is the conjugate of acid `CO_(3)""^(2-)" (or) "CO_(3)""^(2-)` is the conjugate bases of `HCO_(3)""^(-)`.
`* NH_(3)` is the conjugate base of `NH_(4)""^(+)" (or) "NH_(4)""^(+)` is the conjugate acid of `NH_(3)`.
Discussion
40.

Identify the copolymer in the following :

Answer»

Bakelite
Polyisoprene
TEFLON
PVC

Answer :A
Discussion
41.

Identify the coordination number of Ni^(2+) in [Ni(en)_(3)]Cl_(2)

Answer»

`3`
`2`
`6`
`5`

ANSWER :C
Discussion
42.

Identify the conjugate acid base pair for the following reaction in aqueous solution HS^-(aq)+HF leftrightarrow F^(-) (aq) +H_2S (aq) (ii) HPO_4^(2-)+ SO_3^(2-) leftrightarrow PO_4^(3-)+HSO_3^(-) (iii) NH_4^(+)+CO_3^(2-) leftrightarrow NH_3+HCO_3^(-)

Answer»

Solution :
`HF and F^-,HS^- and H_2S` are TWO conjugate ACID-base PAIRS.
`F^-` is the conjugate base of the acid HF (or) HF is the conjugate acid of `F^-`
`H_2S` is the conjugate acid of `HS^-` (or) `HS^-` is the conjugate base of `H_2S`.

`HPO_4^(2-) and PO_4^(3-), SO_3^(2-) and HSO_3^(-)` are two conjugate acid-base pairs.
`PO_4^(3-)` is the conjugate base of the acid `HPO_4^(2-)` (or)`HPO_4^(2-)` is the conjugate acid of `PO_4^(3-)`
`HSO_3^(-)` is the conjugate acid of `SO_3^(2-)` (or) `SO_3^(2-)` is the conjugate base of `HSO_3^(-)`

`NH_4^(+) and NH_3,CO_3^(2-) and HCO_3^-` are two conjugate acid -base pairs.
`HCO_3^-` is the conjugate of acid `CO_3^(2-)` (or) `CO_3^(2-)` is the conjugate bases of `HCO_3^-`.
`NH_4` is the conjugate base of `NH_4^(+)` (or) `NH_4^(+)` is the conjugate acid of `NH_3`
Discussion
43.

Identify the compounds (X), (Y) and (Z) in the following reaction : CH_(3)Broverset(Mg//ether)toX overset((i)CO_(2))underset((ii)"water")to Y overset(CH_(3)OH,H^(+))underset(Delta)toZ

Answer»

`(X)=CH_(3)MgBr, (Y)=CH_(3)COOH, (Z)=CH_(3)COOCH_(3)`<BR>`(X)=CH_(3)CH_(2)Br, (Y)=CH_(3)CH_(2)OH, (Z)=CH_(3)CH_(2)CH_(2)CH_(3)`
`(X)=CH_(3)CH_(2)MgBr, (Y)=CH_(3)CH_(2)COOH, (Z)=CH_(3)CH_(2)COCH_(3)`
`(X)=CH_(3)COOH, (Y)=CH_(3)CH_(2)COCH_(3), (Z)=CH_(3)COOCH_(3)`

SOLUTION :
Discussion
44.

Which one of the following undergoes aldol condensation and gives iodoform test

Answer»

All
I, II, III, IV
I, IV, V only
I, II, IV, V

Answer :C
Discussion
45.

Identify the compounds [E] to [J] in the following reactions. {:([E]overset(LiAH_(4)//"ether")rarr[F]+[G]),([F]overset("PCC")rarr[H]),([H]overset(NaOH(conc.))rarr[I]+[F]),([I]overset([J])rarr(C_(6)H_(5)CO_(2))O),([G]overset([J])underset(NaOH)rarrC_(6)H_(5)COOC_(6)H_(5)):}

Answer»

Solution :Identities of the compounds (E to G) can be established by the following SEQUENCE of reactions:
Discussion
46.

Identify the compounds in which all bond length are equal :

Answer»




SOLUTION :N/A
Discussion
47.

Identify the compounds A,B,C in the following reactions: C_2H_5Cl overset(AgCN)(to)A overset(Sn"/"HCl)(to)B overset(HNO_2)(to)C

Answer»

SOLUTION :`{:(C_2H_5Cloverset(KCN)(to)C_2H_5CNoverset(SN"/"HCL)(to)C_2H_5CH_2NH_2overset(HNO_2)(to)CH_3-CH_2-CH_2-OH),("ETHYL chlorideEthylcyanide1-amino propane1-propenol "):}`.
Discussion
48.

Identify the compounds A,B and C in the following reaction: CH_(3)-Broverset(Mg//"Ether")(to)[A]underset((ii)"Water")overset((ii)CO_(2))(to)[B]underset(Delta)overset(CH_(3)OH//H^(+))(to)[C]

Answer»

Solution :`A=CH_(3)MgBr`
`B=CH_(3)COOH`
`CH=CH_(3)-OVERSET(O)overset(||)(C)-O-CH_(3)`
Discussion
49.

Identify the compounds A and B. PCl_5 + SO_2 A + B rarr.

Answer»

SOLUTION :`PCl_5 + SO_2 RARR POCl_3 + SOCl_2`.
Discussion
50.

Identify the compound 'Y' in the following sequence of reaction: HC-=CHoverset((i)O_3)underset((ii)H_2O //Zn)rarrXoverset(Zn//CH_3COOH)rarrY

Answer»




`CH_3COOH`

SOLUTION :
HENCE, (A) is the CORRECT ANSWER.
Discussion