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.

The compound which reacts with HBr obeying Markownikoff's rule is

Answer»

`CH_2=CH_2`
cis-2-Butene
trans-2-Butene
`(CH_3)_2C=CH_2`

ANSWER :D
Discussion
2.

The compound which reacts fastest with Lucas reagent at room temperatureis

Answer»

butan-1-ol
butan-2-ol
2-methylpropan-1-ol
2-methylpropan-2-ol

Solution :N//A
Discussion
3.

The compound which reacts fastest with Lucas reagent at room temperature is

Answer»

butan-1-ol
butan -2-ol
2-methypropan-1-ol
2-methylpropan -2-ol

Answer :D
Discussion
4.

The compound which reacts faster with Lucas reagent at room temperature is

Answer»

butan-1-ol
butan-2-ol
2-methyl propan-1-ol
2-methyl propan-2-ol

Solution :It is a tertiary alcohol and hence, is most BASIC. Consequently, it reacts FASTER with HCI in PRESENCE of `ZnCl_2` (Lucas REAGENT).
Discussion
5.

The compound which reacts fastest with Lucas reagent at room temperature is :

Answer»

Butan-1-ol
Butan-2-ol
2-methylpropan -1-ol
2-methylpropam -2-ol

Answer :D
Discussion
6.

The compound which on reduction with LiAIH_4 gives two alcohols

Answer»

`CH_3 CHO`
`CH_3 COOC_2 H_5`
`CH_3 CO CH_3`
`CH_3 COOCH_3`

ANSWER :D
Discussion
7.

The compound which on reaction with cold HNO_2 gives only nitrosoamine is :

Answer»

`CH_3NH_2`
`(CH_3)_2NH`
`(CH_3)_3N`
`(C_2H_5)_3N`

ANSWER :B
Discussion
8.

The compound which on reduction with LiAlH_4 gives two alcohols:

Answer»

`CH_3COOCH_3`
`CH_3COOC_2H_5`
`CH_3COCH_3`
`CH_3CHO`

ANSWER :A
Discussion
9.

The compound which on reacting with aqueous nitrous acid at low temperature produces an oily nitrosamine is

Answer»

ETHYL amine
aniline
methyl amine
Diethyl amine

Answer :D
Discussion
10.

The compound which on reaction with aqueous nitrous acid at low temperature produces an oil nitrosoamine is

Answer»

Methylamine
Ethylamine
DIETHYLAMINE
TRIETHYLAMINE

SOLUTION :`2^(@)` AMINE gives only Nitrosomine
Discussion
11.

The compound which on reaction with aqueous nitrous acid at low tremperature produces an oily nitrosoamine is :

Answer»

Methylamine
Ethylamine
Diethylamine
Triethgylamin

Solution :`2^@` amines REACT with `HNO_2` at low temperature to give ily nitrosamine.
` Et_2 NH + NHO_2 rarr underset (N-"Nitroso N-ethyl ethanamine") (Et_2 N-N=O + H_2O)`.
Discussion
12.

The compound which liberates H^2 gas with sodium metal is ,

Answer»

aldehyde
ethanol
ether
ketone

Answer :B
Discussion
13.

Which of the following is used as acetylating agent

Answer»

glacial acetic acid
ethyl ACETATE
acetic ANHYDRIDE
ANHYDROUS SODIUM acetate

Answer :C
Discussion
14.

The compound which is insoluble in dil. HCl is:

Answer»

`BaSO_4`
MnS
ZnS
`BaCO_3`

ANSWER :A
Discussion
15.

The compound which is not formed when a mixture of n-butyl bromide and ethyl bromide treated with sodium metal in the presence of dry ether is

Answer»

Butane
Octane
Hexane
Ethane

Answer :D
Discussion
16.

The compound which is not isomeric with diethyl ether is :

Answer»

n-propyl METHYL ETHER
Butan-1-ol
2-methylpropan-2-ol
BUTANONE

ANSWER :D
Discussion
17.

The compound which is not formed on heating Be(NO_3)_2 is

Answer»

`N_2O`
`O_2`
`NO_2`
`BEO`

ANSWER :A
Discussion
18.

The compound which is not formed during the dry distillation of mixture of calcium formate and calcium acetate is

Answer»

PROPANAL
Propanone
Ethanal
Methanal

Solution :The following compound are obtained when a mixture of calcium formate and calcium ACETATE are subjected to dry distillation:
`underset("Calcium acetate")((HCOO)_(2))Ca OVERSET(Delta)to underset("Methanal")(HCHO)+CaCO_(3)`
`underset("Calcium acetate")((CH_(3)COO)_(2))Ca overset(Delta)tounderset("Propanone")(CH_(3)COCH_(2))+CaCO_(3)`
`(HCOO)_(2)Ca+(CH_(3)COO)_(2)Ca overset(Delta)to underset("Ethanal")(2CH_(3)CHO)+CaCO_(3)`
thus, only propanal is not formed.
Discussion
19.

The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is

Answer»

Propanal
Propanone
Ethanal
METHANAL

Solution :The FOLLOWING compound are OBTAINED when a mixture of calcium formate and calcium acetate are subjected to dry distilation:
`underset("Calcium formate")((HCOO)_(2)Ca)overset(Delta)(to)underset("Methanal")(HCHO)+CaCO_(3)`
`underset("Calcium acetate")((CH_(3)COO)_(2)Ca)overset(Delta)(to)underset("Propanone")(CH_(3)COCH_(3))+CaCO_(3)`
`(HCOO)_(2)Ca+(CH_(3)COO)_(2)Ca overset(Delta)(to)underset("Ethanal")(2CH_(3)CHO+CaCO_(3)`
Thus, only propanal is not formed.
Discussion
20.

The compound which is mixed with alcohol to get a substitute for petrol is

Answer»

ethanol
diethyl ether
acetaldehyde
propanol

Answer :B
Discussion
21.

The compound which is least reactive among the following in a nucleophilic substitution reaction is

Answer»

`CH_2=CHCl`
`CH_3CH_2Cl`
`CH_2=CHCH_2Cl`
`(CH_3)_3C-Cl`

ANSWER :A
Discussion
22.

The compound which is insoluble in hot water and NH_3 is:

Answer»

`PbCl_2`
AGCL
`BaSO_4`
NONE of these

Answer :C
Discussion
23.

The compound which is added to table salt for maintaining proper health is

Answer»

KCl
KBR
NAI
`MgBr_(2)`

ANSWER :C
Discussion
24.

The compound which is functional isomer of diethyl ether is,

Answer»

1-methoxypropane
butan-1-ol
2-methoxypropane
both 'a' and 'c'

Answer :B
Discussion
25.

The compound which has one isopropyl group is

Answer»

2,2,3,3-tetramethyl PENTANE
2,2 DIMETHYL pentane
2,2,3-trimethyl pentane
2-methyl pentane

Solution :`CH_3-UNDERSET(CH_3)underset(|)CH-underset"2-methyl pentane"(CH_2-CH_2-CH_3)`
Discussion
26.

The compound which gives white ppt. with aqueous AgNO_3 and a green flame test is :

Answer»

`BaCl_2`
`KCl`
`NaCl`
`CaCl_2`.

Solution :`BaCl_2(AQ) + 2AgNO_3 (aq) to underset("White ppt")(2AgCl) + Ba(NO_3)_2`
`Ba^(2+)` GIVES GREEN colour in FLAME test .
Discussion
27.

The compound that reacts fastest with Lucas reagent is

Answer»

butan -1-ol
butan-2-ol
2-methyl propan-2-ol
2-methyl propan-1-ol

Solution :Tertiary ALCOHOL (2-methylpropan-2-ol) gives turbidity IMMEDIATELY with LUCAS reagent (conc.HCl+anhyd.`ZnCl_(2)`) at room temperature .
Discussion
28.

The compound which gives the most stable carbonium on de

Answer»




SOLUTION :N//A
Discussion
29.

The compound which gives the most stable carbonium ion on dehydration is

Answer»

`{:(CH_(3)-CH-CH_(2)OH),("|"),(""CH_(3)):}`
`{:(""CH_(3)),("|"),(CH_(3)-C-OH),("|"),(""CH_(3)):}`
`CH_(3)-CH_(2)-CH_(2)-CH_(2)OH`
`{:(""OH),("|"),(CH_(3)-CH-CH_(2)-CH_(3)):}`

Solution :Tertiary CARBONIUM ion is more stable than primary and secondary carbonium ion.
Discussion
30.

The compound which gives the most stable carbonium ion and dehydration is :

Answer»



`CH_3-CH_2-CH_2-CH_2OH`

ANSWER :B
Discussion
31.

The compound which gives positive iodoform test is :

Answer»

1-pentanol
2-pentanone
3-pentanone
pentanal

Solution :N//A
Discussion
32.

The compound which gives propane on reduction with Zn and dilute hydrochloric acid is

Answer»

`CH_3CH_2CH_2OH`
`CH_3CH=CH_2`
`CH - C -= CH`
`CH_3CH_2CH_2 - CL`

ANSWER :D
Discussion
33.

Which gives off oxygen on moderate heating:

Answer»

ZINC Oxide
Mercuric Oxide
Aluminium Oxide
Ferric oxide

Answer :B
Discussion
34.

The compound which gives off oxygen on moderate heating is

Answer»

CUPRIC OXIDE
mercuric oxide
zinc oxide
aluminium oxide

Solution :`2HgO OVERSET(723 K) rarr 2HG + O_2`
Discussion
35.

The compound which gives off oxygen on moderate heating is :

Answer»

Cupric OXIDE
Mercuric oxide
ZINC oxide
ALUMINIUM oxide.

ANSWER :B
Discussion
36.

The compound which gives negative iodoform test is :

Answer»

`CH_3CHO`
`CH_3CH_2OH`
`C_6H_5COCH_3`
`C_6H_5CH_2CH_2OH`

ANSWER :D
Discussion
37.

The compound which gives an oily nitrosoamine on reaction with nitrous acid at low temperature is

Answer»

`CH_(3)NH_(2)`
`(CH_(3))_(2)CHNH_(2)`
`CH_(3)-NH-CH_(3)`
`(CH_(3))_(3)N`

SOLUTION :`2^(@)` AMINES, i.e., `(CH_(3))_(2)NH`, on treatment with `HNO_(2)` GIVE oily nitroamines.
Discussion
38.

The compound which gives carbon with conc. H_(2)SO_(4)

Answer»

SUGAR
WOOD
STARCH
Alcohol

Solution :Alcohol gives ether `2C_(2)H_(5)OH underset(-H_(2)O)overset("CONC. "H_(2)SO_(4))to H_(5)C_(2)-O-C_(2)H_(5)`
Discussion
39.

The compound which gives an oily nitrosomine on reaction with nitrous acid at low temperature is……….

Answer»

`C_2H_5NH_`
`(CH_3)_2NH`
`(CH_3)_3N`
`(CH_3)_2CHNH_2`

ANSWER :B
Discussion
40.

The compound which gives carbon with con H_2SO_4

Answer»

Sugar
Wood
Starch
All

Answer :D
Discussion
41.

The compound which gives acetone on ozonolysis is ............

Answer»

`CH_3 -CH = CH - CH_3`
`(CH_3)_2C = C (CH_3)_2 `
`C_6H_5CH = CH_2`
`CH_3 - CH = CH_2`

SOLUTION :`(CH_3)_2C = C (CH_3)_2 `
Discussion
42.

The compound, which give a positive ninhydrin test arid a negative Benedict's solution test, is

Answer»

a monosaccharide
a disaccharide
a lipid
a PROTEIN

Solution :Only proteins give positive NINHYDRIN TEST. They give blue COLOUR with ninhydrin.
Discussion
43.

The compound which forms acetaldehyde when heated with dilute NaOH is

Answer»

1, 1 Dichloroethane
1, 1, Trichloro ethane
1-chloroethane
1,2-Dichloro ethane.

Solution :`HCHOrarr` does not have an a hydrogen, so it will give CANNIZZARO reaction.
does not have an a hydrogen, so it will give Cannizzaro reaction
`{:("HCH"_(3)),("||"),(CH_(3)-C-C-CHOrarr),("||"),("HCH"_(3)):}` does not have an `alpha` hydrogen, it will give Cannizzaro reaction.
It has `alpha` hydrogen, hence will not give cannizzaro reaction.
Discussion
44.

The compound which exist as a dimer is

Answer»

LICL has HIGHER melting point than NaCl
`MgCl_(2)`
`AlCl_(3)`
`SiCl_(4)`

Solution :In `AlCl_3`, Al has only six electrons in the valence shell. Therefore it needs 2 more electrons to COMPLETE its OCTET to do so it, accepts a lone pair of electrons from Cl atom through coordinate bond.
Discussion
45.

The compound, which evolves carbon dioxide on treatment with aqueous solution of sodium bicarbonate at 25^(@)C, is

Answer»

`C_(6)H_(5)OH`
`CH_(3)COCl`
`CH_(3)CONH_(2)`
`CH_(3)COOC_(2)H_(5)`

Solution :In aqueous `NaHCO_(3)` solution, some AMOUNT of OH is present, which HYDROLYSES `CH_(3)COCI` to `CH_(3)COOH` which subsequently reacts with `NaHCO_(3)` present in the medium to FORM `CO_(2)`
Discussion
46.

The compound which exhibits optical isomerism is:

Answer»

`CH_3CHOHCH_3`
`(CH_3)_2CHCH_2CH_3`
`CH_3CHClCH_2CH_3`
`CH_3C Cl_2CH_2CH_3`

ANSWER :C
Discussion
47.

The compound which exhibits optical isomerism is :

Answer»

`CH_(3)CHOH-CH_(3)`

`CH_(3)-CHCl-CH_(2)CH_(3)`
`CH_(3)-C Cl_(2)-CH_(2)CH_(3)`

Answer :D
Discussion
48.

The compound which will not react with sodium is :

Answer»

`CH_3CHOHCH_3`
`CH_3-O-CH_3`
`CH_3COOH`
`C_2H_5OH`

ANSWER :B
Discussion
49.

The compound which does not undergo hydrolysis by S_(N^(1)) mechanism is:

Answer»

`CH_(2)=CHCH_(2)Cl`
`C_(6)H_(5)Cl`
`C_(6)H_(5)CH_(2)Cl`
`C_(6)H_(5)CH(CH_(3))Cl`

Solution :Chlorobenzene does not undergo hydrolysis by FOLLOWING `S_(N^(1))` mechanism.
Discussion
50.

The compound which does not show paramagnetism is

Answer»

`[CU(NH_3)_4]Cl_2`
`[Ag(NH_3)_2]CL`
`[NiCl_4]^(2-)`
`[CoF_6]^(3-)`

ANSWER :B
Discussion