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.

Correct statement about the electrophilic substitution in benzene ring is

Answer»

HALOGENS are benzene RING deactivating group due to resonance
Halogens are ortho and para DIRECTING groups due to their -I effect.
Halogens are ortho and para directing and benzene ring activating groups.
Halogens are benzene ring deactivating groups due to their -I effect.

Answer :D
Discussion
2.

Correct statement about heat and work is that

Answer»

Heat APPEARS at surface only and WORK in BULK
Heat appears in bulk and work only at surface
Both heat and work APPEAR in bulk of sysem
Both heat and work appear on surface only

Answer :D
Discussion
3.

Correct statement about dipole moment is :-

Answer»

`(R_(3)NO)_(mu) lt (R_(3)PO)_(mu)`
`(R_(3)NO)_(mu) gt (R_(3) PO)_(mu)`
`(R_(3) NO)_(mu) = (R_(3) PO)_(mu)`
NONE of these

Answer :B
Discussion
4.

Correct statement about FeO at room temperature

Answer»

It is non-stoichiometirc and metal deficient
It is basic oxide
Its aqueous SOLUTION changes to `Fe(OH)_(3)` and then to `Fe_(2)O_(3),xH_(2)O`by atmospheric oxygen
It gives red colour with KCNS

Answer :A::B::C
Discussion
5.

Correct statement about 1, 3-dibutene

Answer»

CONJUGATED DOUBLE BONDS are present
Reacts with HBr
Forms polymer
All of these

Answer :D
Discussion
6.

Correct statement

Answer»




All of these

Answer :D
Discussion
7.

Correct stament for nucleophlic addition of sodium bisulphate on carbonyl compounds is:

Answer»

This ADDITION is highly sensitive to crowding steric crowding increase, then addition decreases, so ALDEHYDE more reactive than ketone in this REACTION
This reaction used for separation of aldehyde and ketone from a mixture containing some other compounds becouse addition product is a crystaline salt
It is reversible reaction, so BISULPHITE addition product regenerate corresponding carbonyl compound on treatment with acid or BASE
All of these

Answer :D
Discussion
8.

Correct statement about1 , 3- butandieneis

Answer»

Conjugated doublebondsare present
Reactswith HBr
Forms polymer
All of these

SOLUTION :`UNDERSET(1,3 "Butadiene ") (CH_(2)=CH-CH=CH_(2))`
Discussion
9.

Correct statbility order of metal cation is /are :

Answer»

`PB^(2+) lt Sn^(2+)`
`Pb^(4+) lt Pb^(2+)`
`Sn^(4+) lt Sn^(2+)`
`Pb^(4+) lt Sn^(4+)`

Solution :Due to phenomenon of inert PAIR EFFECT `Pb^(2+)` is more stable than `Pb^(4+)`
Discussion
10.

Correct stability order of following carbocation :- (i)CH_3-O-overset(o+)CH_2 (ii)Ph-overset(o+)CH_2 (iii)CH_2=CH-overset(o+)CH_2 (iv)Ph^(o+)

Answer»

ii gt i gt III gt iv
i gt ii gt iii gt iv
iii gt i gt ii gt iv
iv gt i gt ii gt iii

Solution : (iii)`CH_2=CH-overset(o+)CH_2` RESONANCE STABILISED . 2 resonating structure
(iv)`Ph^(o+)` No. resonance of +ve charge
`THEREFORE` stability is (i) > (ii) > (iii) > (iv)
Discussion
11.

Correct solubility order :-

Answer»

`CaCrO_(4) gt BaCrO_(4)`
`BeCO_(3) LT BaCO_(3)`
`LiNO_(3) lt CsNO_(3)`
`NaClO_(4) lt KClO_(4)`

Answer :A
Discussion
12.

correct sequence of reagents to convert P-4 into P-3:

Answer»

(i) Zn , (ii) dil. `H_(2)SO_(4)`
(i) Na/`Et_(2)O`, (ii)`B_(2)H_(6)`, (iii) NaOH,`H_(2)O_(2)`
(i)MG(excess)/`Et_(2)O, (ii)O_(2)`(excess), (iii)`NHBH_(4)Cl`(excess)
(i) Mg(1 eq.),(ii)`HG(O Ac)_(2)+H_(2)O`, (iii)` NaBH_(4)`

SOLUTION :
Discussion
13.

Correct set of species with zero dipole moment is : (i) CO_(2) "" (ii) COCl_(2) "" (iii) CH_(2)Cl_(2) "" (iv) BCl_(3)

Answer»

i and iv
ii and iv
III and iv
I, iii and iv

Solution :
Discussion
14.

Correct sequence of CO bond order in given compounds is: (P) Fe(CO)_(5) (Q) CO (R) H_(3) B larr CO (S) [Mn(CO)_(5)]^(-)

Answer»

`P gt R gt S gt Q`
SgtPgtRgtQ
QgtSgtPgtR
RgtQgtPgtS

Solution :CO BOND order`prop(1)/("EXTENT of back bonding "(MTO CO))`
Correct sequence of CO bond order:
`underset(("CO bond order "gt3.0))(H_(3)B larr CO) gt underset(B.O.=3.0)(CO) gt underset(("CO bond order " LT 3.0))(Fe(CO)_(5)) gt underset(("CO bond order "lt 3.0))([Mg(CO)_(5)]^(-))`
Discussion
15.

Correct relationship between heat of fusion (DeltaH_(fus)), heat of vaporization (DeltaH_("vap")) and heat of sublimation (DeltaH_("sub")) is

Answer»

`DeltaH_("fus")=DeltaH_("VAP")+DeltaH_("SUB")`
`DeltaH_("vap")=DeltaH_("fus")+DeltaH_("sub")`
`DeltaH_("sub")=DeltaH_("vap")+DeltaH_("fus")`
`DeltaH_("sub")=DeltaH_("vap")-DeltaH_("fus")`

Answer :C
Discussion
16.

Correct relationship b/w pair of compounds. (a) 1-Conformer ,2-Conformer ,3-Conformer (b) 1-Conformer , 2-Stereoisomers (GI) ,3-Stereoisomers (GI) ( c) 1-Conformer ,2-Stereoisomers (GI) , 3-Conformer (d) 1-Stereoisomerism (GI) ,3-Conformer

Answer»


SOLUTION :N//A
Discussion
17.

Correct reactivity order for NAR in following compound.

Answer»

`I GT II gt III`
`II gt III gt I`
`III gt I gt II`
`II gt I gt III`

ANSWER :D
Discussion
18.

Correct Reactivity order of E.S.R :

Answer»

`igtiigtiii`
`iiigtiigti`
`igtiiigtii`
`iigtigtiii`

ANSWER :C
Discussion
19.

Correct pair of polymer and it's monomer is…...

Answer»

Nylon-6 `RARR` Caprolactum
Neoprene `rarr` Isoprene
Orlon `CH_2=Ch-CH=CH_2`
BAKELITE `rarr` Chloroprene

Answer :A
Discussion
20.

Correct pair of compounds which gives blue colouration/precipitate and white precipitate , respectively , when their Lassaigne's test is separately done is

Answer»

`NH_(2) NH_(2) . HCL` and `ClCH_(2) COOH`
`NH_(2) CSNH_(2)` and `PhCH_(2) Cl`
`NH_2 CH_2 COOH` and `NH_(2) CONH_(2)`

SOLUTION :
Discussion
21.

Correct pair of compounds which gives blue colouration/ precipitate and white precipitate, respectively, when their Lassaigne's test is separately done is

Answer»

`NH_(2)NH_(2)*HCIAND CICH_(2)COOH`
`NH_(2)CSNH_(2)andphCH_(2)CI`
`NH_(2)CSNH_(2)andphCH_(2)CI`

SOLUTION :
Discussion
22.

Correct pair of compounds which gives blue colouration/precipitate and white precipitate , respectively, when their Lassaigne's testis separately done is

Answer»

`NH_(2)NH_(2).HCl` and `ClCH_(2)COOH`
`NH_(2)CSNH_(2)`and `PhCH_(2)CL`
`NH_(2)CH_(3)COOH` and`NH_(2)CONH_(2)`

Solution :ORGANIC compound
Discussion
23.

Correct orderof increasing reactivity of HX towareds alkenes is

Answer»

`HF lt HBR gt HI gt HCl `
`HF lt HBr lt HCl lt HCl `
` HF lt Hl lt HBr lt HCl`
`HF lt HCl lt HBr lt Hl`

Solution :The reactivity of HX molecule DEPENDS upon bond length between H-X. More the bond lengh more the reactivity. From F to I atomic size as WELL as bond length increases. Hence reactivity order is `HF lt HCl lt HBr lt HI`
Discussion
24.

Correct order of stability when 'Z' is

Answer»

`CH_3 GT CD_3 gt- CT_3`
`-CD_3 gt -CT_3 gt -CH_3`
`-CT_3 gt-CD_3 gt -CH_3`
`-CH_3 gt -CT_3 gt -CD_3`

ANSWER :C
Discussion
25.

Correct order of stability of the following resonating structure is CH_(2)=underset((a))(CH)-overset(O)overset(||)C-Hharroverset(Theta)(C)H_(2)-underset((b))(CH)=overset(Theta)overset(O)overset(|)(C)-Hharroverset(Theta)overset(* *)(C)H_(2)-underset((c ))(CH)=overset(o+)overset(O)overset(|)(C)-H

Answer»

`AGTBGTC`
`agtcgtb`
`bgtagtc`
`cgtbgta`

ANSWER :A
Discussion
26.

Correct order of stability of group II A metal carbonates is

Answer»

`MgCO_(3)gtCaCO_(3)gtSrCO_(3)gtBaCO_(3)`
`BaCO_(3)gtSrCO_(3)gtCaCO_(3)gtMgCO_(3)`
`SrCO_(3)gtBaCO_(3)gtCaCO_(3)gtMgCO_(3)`
`CaCO_(3)gtMgCO_(3)gtBaCO_(3)gtSrCO_(3)`

Answer :B
Discussion
27.

Correct order of solubility

Answer»

`Be(OH)_(2) lt Mg(oH)_(2) lt Ca(oH)_(2) lt SR(oH)_(2) lt BA(oH)_(2)`
`Mg(oH)_(2) lt Be(oH)_(2) lt Ca(oH)_(2) lt Sr(oH)_(2) lt Ba(oH)_(2)`
`Be(oH)_(2) lt Sr(oH)_(2) lt Ca(oH)_(2) lt Mg(oH)_(2) lt Ba(oH)_(2)`
`Ba(oH)_(2) lt Mg(oH)_(2) lt Ca(oH)_(2) lt Sr(oH)_(2) lt Be(oH)_(2)`

Answer :A
Discussion
28.

Correct order of strength of a pi-bond(s) are :- (i) BO_(3)^(3-)gtCO_(3)^(2-)gtNO_(2) (ii) ClO_(4)^(-)gtSO_(4)^(2-)gtPO_(4)^(3-) (iii) BF_(3)gtBCl_(3)gtBBr_(3) (iv) AlCl_(3)gtBCl_(3)

Answer»

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

Answer :B
Discussion
29.

Correct order of size is :-

Answer»

`F GT C gt BR gt Ge `
`Ge gt C gt F gt Br`
`Ge gt Br gt C gt F`
`Ge gt C gt Br gt F`

Solution :`Ge gt Br gt C gt F`
Discussion
30.

Correct order of resonance energy of following compounds :

Answer»

`IIgtIgtIVgtIII`
`IIgtIVgtIgtIII`
`IgtIIgtIIIgtIV`
`IIgtIgtIIIgtIV`

SOLUTION :
I,II,III are AROMATIC due to delocalisation so more resonance energy than IV.
Due to delocalisation- `I^(st)` get positive character on NITROGEN
`II^(nd)` get positive character on sulfur.
`III^(RD)` get positive character on oxygen.
E.N: Oxygen GT Nitrogen gt Sulphur
So resonance energy IIgtIgtIIIgtIV.
Discussion
31.

Correct order of reactivity of alkyl bromides towards SN^2reaction isCH_3Br(I) , CH_3CH_2Br(II), (CH_3)_2CHBr(III), (CH_3)_3C.Br(IV)

Answer»

IV gt II gt III gt I
I gt II gt III gt IV
I gt IV gt II gt III
IV gt III gt II gt I

Answer :B
Discussion
32.

Correct order of reactivity for halides

Answer»

VINYL CHLORIDE `GT` allylchloride `gt` PROPYL chloride
Propyl chloride `gt` vinyl chloride `gt` Allyl chloride
Allyl chloride > Propyl chloride > vinyl chloride
None

Answer :C
Discussion
33.

Correct order of rates of alkaline hydrolysis (B_(AC^(2))) of compounds P to S is :

Answer»

<P>`P GTS gtR gtQ`
`PgtRgtSgtQ`
`QgtRgtSgtP`
`QgtSgtRgtP`

ANSWER :A
Discussion
34.

Correct order of + R effect is 1. 1.-CH_(3)2.-OH 3. -OR4. -NH_(2)

Answer»

`4gt2gt1gt3`
`4 gt1gt2gt3`
`4gt2gt3gt1`
`4gt3gt2gt1`

ANSWER :C
Discussion
35.

Correct order of radii

Answer»

`Na gt Mg gt AI`
`Na^(+) gt Mg^(2+) gt AI^(3+)`
`I+ LT I lt I^(-)`
N , He, Ne

Answer :A
Discussion
36.

Correct order of polarising power is

Answer»

`CS^(+)ltK^(+)LTMG^(2+)ltAl^(3+)`
`K^(+)ltCs^(+)ltMg^(2+)ltAl^(3+)`
`Cs^(+)ltK^(+)ltAl^(3+)ltMg^(2+)`
`K^(+)ltCs^(+)ltAl^(3+)ltMg^(2+)`

ANSWER :A
Discussion
37.

Correct order of MP in transition element is

Answer»

`W gt MO gt Cr`
`Cr gt Fe gt Mn`
`Cu gt Au gt AG`
`V gt Cr gt Ti`

Solution :M.P depends on metalllic band STRENGTH
Discussion
38.

Correct order of osmotic pressure of the following solution is (a) 34.2 gmL^(-1) of glucose (b) 60 gm L^(-1) of urea (c) 90 gm L^(-1) of glucose (d) 58.5 gm L ^(-1) of NaCl

Answer»

`A lt B lt CLT D`
`A lt Clt B lt D`
`A lt D lt BLT C`
`A lt Clt D lt B`

Answer :B
Discussion
39.

Correct order of leaxing group tendency is

Answer»

`I^(-) GT BR^(-)gt CL^(-) gt F^-`
`F^(-) gt Cl^(-) gt Br^(-) gt I^(-)`
`Cl^(-) gt F^(-) gt Br^(-) gt I^(-)`
`I^(-) gt Cl^(-) gt Br^(-) gt F^(-) `

SOLUTION :`I^(-) gt Br^(-)gt Cl^(-) gt F^-`
Discussion
40.

Correct order of metallic character is :-

Answer»

`P LT Si lt Be lt MG lt NA`
`Si lt P lt Be lt Na lt Mg`
`P lt Si lt Mg lt Be lt Na`
`Si lt P lt Mg lt Na lt Be`

Solution :Sequential ORDER : `Na gt Mg gt Be gt Si gt P`
Discussion
41.

Correct order of leaving group ability for S_(N)2 reaction is :

Answer»


`CH_(3)CO_(2)^(-) gt H_(3)C (##JEE_SCR_TST_02_E02_019_O02##)-SO_(3)^(-1)`
`F_(3)C-overset(O)overset(||)(C)-O^(-) gt F^(-)`
`NH_(2) gt -N_(2)^(+)`

ANSWER :C
Discussion
42.

Correct order of ionisation enthalpy is

Answer»

`Be LT B lt C lt N lt O`
`BltBeltCltNltO`
`BeltBltCltOltN`
`BltBeltCltOltN`

ANSWER :D
Discussion
43.

Correct order of ionic Radii is :-

Answer»

`YB^(+3) LT PM ^(+3) lt LA^(+3) lt Ce^(+3)`
`Ce^(+3) lt Yb^(+3) lt Pm^(+3) lt La^(+3)`
`Yb^(+3) lt Pm^(+3) lt Ce^(+3) lt La^(+3)`
`Pm^(+3) lt La^(+3) lt Ce^(+3) lt Yb^(+3)`

Answer :C
Discussion
44.

Correct order of increasing boiling points is

Answer»

PROPANE LT n-butane lt ETHANOL lt water
propane lt ethanol lt n-butane lt water
waterlt ethanol lt propane lt n-butane
water lt propane lt n-butane lt ethanol

Answer :A
Discussion
45.

Correct order of Ionic radii :-

Answer»

<P>`Ti^(4+) lt Mn^(7+)`
`Cr^(+6) GT Cr^(3+)`
`K^(+) gt CL^(-) `
`P^(3+) gt P^(+5)`

Answer :D
Discussion
46.

Correct order of increasing basicity is

Answer»

`NH_(3)ltC_(6)H_(5)NH_(2)(C_(2)H_(5))_(2)NHltC_(2)H_(5)NH_(2)lt(C_(2)H_(5))_(3)N`
`C_(6)H_(5)NH_(2)ltNH_(3)lt(C_(2)H_(5))lt(C_(2)H_(5))_(3)Nlt(C_(2)H_(5))_(2)NHltC_(2)H_(5)NH_(2)`
`C_(6)H_(4)NH_(2)ltNH_(3)ltC_(2)H_(5)NH_(2)lt(C_(2)H_(5))_(3)Nlt(C_(2)H_(5))_(2)NH`
`C_(6)H_(5)NH_(2)lt(C_(2)H_(5))_(3)NltNH_(3)ltC_(2)H_(5)NH_(2)lt(C_(2)H_(5))_(2)NH`

Solution :BASICITY of amines increase with increase in NUMBER of `-CH_(3)` groups (or any group which cause +I effect), due to increase in electron DENSITY on N atom. As a rule, the basicity of t-amine should be more than that of s-amine, but actually it is FOUND to be lesser than s-amines. this is due to steric hinderence of bulkier alkyl groups, which decreases the availability of line pair of electron on the N atom of the amino group. Hence the correct order of basicity is:
`(CH_(3))_(2)NHgt(CH_(3))_(3)NgtCH_(3)NH_(2)`
Discussion
47.

Correct order of increasing activity is

Answer»

CU,MG,Na
Na,Mg,Cu
Mg,Na,Cu
Cu,Na,Mg

Solution :`Cu^(+2)+ 2e^(-) to Cu, E^(@)=+0.34 V`
`Mg^(+2) +2e^(-)to Mg, E^(@)=-2.37 V`
`Na^(+) +e^(-)to Na, E^(@)=-2.71 V`
Discussion
48.

Correct order of -I effect is 1.-CN2.CF_(3) 3. -NO_(2)4.-SO_(3)H

Answer»

`4gt3gt2gt1`
`2gt3gt1gt4`
`3gt1gt4gt2`
`3gt2gt4gt1`

ANSWER :B
Discussion
49.

Correct order of extent of overlapping is :-

Answer»

`2s-2s GT 2p-2p gt 2s-2p`
`1s-1s gt 2p-2p gt 2s-2p`
`1s-1s LT 2s-2s lt 3s-3s`
`3s-3s gt 3s-3pgt 3p-3p`

Solution :EXTENT of overlapping `porp`directional character
Extent of overlapping `PROP (1)/("size of orbital")`
Discussion
50.

Correct order of first ionisation energy is :-

Answer»

`C gt N gt O`
`Mg gt AL gt P`
`Li LT Be lt N`
`Tl gt B gt In`

Answer :C
Discussion