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 IUPAC name of CH_(3)-underset(CH_(3))underset(|)(CH)-CH_(2)-overset(O)overset(||)(C)-Br is:

Answer»

2-Methylbutanoyl bromide
2-Methylbutane-4-oyl bromide
1-Bromo-3-Methylbutanone
3-Methylbutanoyl bromide

Answer :D
Discussion
2.

The IUPAC name of CH_3 - underset(Br)underset(|) overset(CH_3)overset(|)C-CH_2Br is …………………….. .

Answer»

SOLUTION :1,2-dibromo-2-methylpropane
Discussion
3.

The IUPAC name of CH_(3)-overset(O)overset(||)C-O-CH_(2)-CH=CHCH_3

Answer»

1- acetyloxy - 2 - butane
4 - acetoxy 2 - butane
2 - butenylethanoate
methy-2 - butanoate

ANSWER :C
Discussion
4.

The IUPAC name of CH_(3)-CH_(2)CH=underset(CH_(3))underset(|)"CC"H_(2)OH will be

Answer»

2-Methyl PENTYL ALCOHOL
4-Methyl-3-pentene-ol
2-Methyl pent-2-ene-1-ol
4-Methyl pentyl alcohol

Solution :IUPAC NOMENCLATURE of RULES
Discussion
5.

The IUPAC name of CH_(3)-CH_(2)-underset(CH_(3))underset(|)C=CH_(2) is

Answer»

2-Methylbutene-1
3-Methylbutene-1
VINYL methylethane
Propylethene-1

SOLUTION :IUPAC NOMENCLATURE of RULES
Discussion
6.

The IUPAC name of CH_(3)-CH_(2)-underset(CH_(2)-CH_(2)-CH_(3))underset(|)overset(CH_(3))overset(|)C-overset(C_(2)H_(5))overset(|)(CH)-CH_(2)-CH_(3) is ............ .

Answer»

SOLUTION :3, 4-diethyl, 4-methylptane
Discussion
7.

The IUPAC name of CH_(3)-CH_(2)-underset(CH_(3))underset("|")("C")H-(CH_(2))_(3)-CH_(3)

Answer»

3-methylhexane
4-methylhexane
5-methylheptane
3-methylheptane

Solution :3-methylheptane.
Discussion
8.

The IUPAC name of CH_(3)- CH_(2)-CH_(2)- underset(underset(CH(CH_(3))_(2))(|))(CH)- overset(overset(CH_(3))(|))(CH)- underset(underset(C_(2)H_(5))(|))overset(overset(C_(2)H_(5))(|))(C )- CH_(2)CH_(3) is…….

Answer»

3, 3-diethyl-4-methyl-5-(1-methyl ETHYL) octone
3,3-diethyl-4-methyl-5-propyl octone
3, 3-diethyl-5-methyl-4-(1-methyl ethyl) octone
6, 6-diethyl-4-iso propyl-5-methyloctone

Answer :A
Discussion
9.

The IUPAC name of CH_(3)-CH_(2)-overset(CH_(3))overset("|")underset(CH_(3))underset("|")("C")-underset(C_(2)H_(5))underset("|")("C")=CH-CH_(3)

Answer»

3-ethyl-4,4-dimethyl-2-hexene
4-ethyl-3,3-dimethyl-4-hexene
4-ethyl-3,3-dimethyl-2-hexene
3,4-Diethyl-4-methylpentane

Solution :ACCORDING to LOCANT SET RULE.
Discussion
10.

The IUPAC name of CH_3 - CH - undersetoverset(|)(CH_3)(C )H - (CH_3)_3 - CH_3

Answer»

3-methylhexane
4-methylhexane
5-methylheptane
3-methylheptane

Answer :D
Discussion
11.

The IUPAC name of CH_(3) - C -= C - CH (CH_(3))_(2) is

Answer»

4- Methyl-2-pentyne
4,4-Dimethyl -2- butyne
Isopropylmethyl actylene
2-Methyl-4-pentyne

ANSWER :A
Discussion
12.

The IUPAC name ofCH_(2)=underset(CH_(3)"")underset("|")underset(CH-CH_(3))underset("|")("C")-CH_(2)-CH_(3) is

Answer»

2-Ethyl-3-methylbut-1-ene
2-Isopropylbutene-2
2-Methyl-3-ethylbutene-3
Ethyl isopropylethane

SOLUTION :The IUPAC is name of
`overset(1)(CH_(2))=underset(4CH_(3))underset("| ")underset(""3CH-CH_(3))underset("| ")overset("2 ")("C ")-CH_(2)-CH_(3)`
is 2-Ethyl-thyl but-1-ene
Discussion
13.

The IUPAC name of CH_2 = overset(CH_3)overset(|)C -CH_2Cl is …………………. .

Answer»

SOLUTION :3-Chloro-2-methyl-prop-1-ene
Discussion
14.

The IUPAC name of {:(CH_2-COOH),(|),(C-(OH)COOH),(|),(CH_2COOH):} is

Answer»

2-hydroxy-1,2,3-propanetricarboxylic ACID
3-hydroxy-1,2,3-pentane trioic acid
3-carboxy-3-hydroxy-1,5-pentandioic acid
1,2,3 - TRI carboxy-2-propanol

Answer :A
Discussion
15.

The IUPAC name of {:(CH_(2)-COOH),("|"),(C-(OH)COOH),("|"),(CH_(2)-COOH):} is

Answer»

2-hydroxy propane 1,2,3-tricarboxylic ACID
3-hydroxy 1,2,3-pentanetrioic acid
3-Carboxy-3-hydroxy-1,5-pentandioic acid
both (a) & (c )

Solution :Because FUNCTIONAL group carbons not INCLUDED in LONG chain.
Discussion
16.

The IUPAC name of CH_2 = CHCl is ……………………. .

Answer»

SOLUTION :CHLOROETHANE
Discussion
17.

The IUPAC name of CH_2= CH - CH_2Cl is …………….. .

Answer»

SOLUTION :3-Chloro-prop-1-ene
Discussion
18.

The IUPAC name of C_(6)H_(5)COCl is

Answer»

CHLORO benzylketone
BENZENE chloroketone
Benzene CARBONYL CHLORIDE
Chlorophenyl ketone

Solution :Benzene carbonyl chloride
Discussion
19.

The IUPAC name of (C_(2)H_(5))_(4)C is

Answer»

TETRA ETHYL methane
2, 2-Dimethylpentane
3, 3-diethylpentane
neopentane

Answer :C
Discussion
20.

The IUPAC name of „Bh is

Answer»

Unnil heptium 
Unnil septium 
Unnil hexium 
Unnil bium 

ANSWER :B
Discussion
21.

The IUPAC name of

Answer»

4-isopropyl-6-methyl octane
3-methyl-5-(1-methyl ETHYL) octane
3-methyl-5-isopeopyloctane
6-methyl-4-(1-methyl ethyl) octane

Answer :B::C
Discussion
22.

The IUPAC name of

Answer»

2-ethyl-3-methyl-1-pentene-4-yne
2-ethyl-3-methyl-4-pentene-1-ene
4-ethyl-3-methyl-1-pentene-4-ene
4-ethyl-3-methyl-4-pentene-1-yne

Answer :A
Discussion
23.

The IUPAC name of

Answer»

4-ethyl decane
3-proply nonane
3-hexyl hexane
4-hexyl hexane

Answer :A
Discussion
24.

the IUPAC name of

Answer»

`pent-3-en=4-yne`
`pent-3-en-4-yne`
`pent-2-en-4-yne`
`pent-2-en-3-yne`

ANSWER :a
Discussion
25.

The IUPAC name of

Answer»

4-Methoxybenzoic acid
4-Carboxymethyl benzoate
4-Methoxycarbonylbenzoic acid
None of these

Solution :
Discussion
26.

The IUPAC name of

Answer»

2, 3-dimethyl....... Pentanoyl chloride
2, 4-dimethyl ........pentanoyl chloride
1-chloro-1-oxo-2, 3-dimethyl pentane
2-ethyl-3-methyl butanoyl chloride

Solution :1-chloro-1-oxo-2, 3-dimethylpentane
Discussion
27.

The IUPAC name of ""_(107)Bh is

Answer»

Unnil heptium
Unnil septium
Unnil hexium
Unnil bium

ANSWER :B
Discussion
28.

The IUPAC name of ""_(104)Rf is

Answer»

Unnil hexium
Unnil quadrium
Unun quadrium
Unun pentium

Answer :B
Discussion
29.

The IUPAC name for the given compound is CH_(3)CH=underset(C=CH)underset(|)"CHCH"CH_(3)

Answer»

4-Ethyl pent-2-ene
1-Ethyl-3-methyl but-2-ene
3-Methyl hex-4-en-1-yne
4-Methyl hex-2-en-5-yne

ANSWER :D
Discussion
30.

The IUPAC name for CH_(3) - overset(overset(O)(||))(C )-CH_(2)-CH_(2)-overset(overset(O)(||))(C )-OH is……

Answer»

1-hydroxypetane-1, 4-dione
1, 4-dioxopentanol
1-carboxybutan-3-one
4-oxopentanoic acid

Solution :`overset(5)(C)H_(3)- overset(overset(O)(4||))(C )- overset(3)(C )H_(2) - overset(2)(C )H_(2) - overset(overset(O)(1||))(C )- OH`
Main functional group is `-COOH` and the `-CO` is present in 5 carbon long root chain at 4 position with prefix `-OXO`. HENCE the name is according to (D) 4-oxopentanoic acid
Discussion
31.

The IUPAC name for CH_(3)-overset(O)overset(||)(C)-CH_(2)-CH_(2)-overset(O)overset(||)(C)-OH is ______.

Answer»

1-hydroxypentane-1,4-dione
1,4-dioxopentanol
1,carboxybutan-3-one
4-oxopentanoic acid

Solution :`underset("4-Oxopentanoic acid")(overset(5)(C)H_(3)-overset(O)overset(||)(.^(4)C)-.^(3)CH_(2)-.^(2)CH_(2)-overset(O)overset(||)(.^(1)C)-OH)`
Accorting to the priority order of functional groups, `-COOH` is the principal functional group is PREFERENCE to group. THUS, -COOH group is assigned POSITION 1 while naming the compound.
Discussion
32.

The IUPAC name for CH_(3)-overset(O)overset(||)(C)-CH_(2)-CH_(2) - overset(O)overset(||)(C)-OH is.................... .

Answer»

1-hydroxypentane-1, 4-dione
1, 4-dioxopentanol
1-carboxybutan-3-one
4-oxopentanoic ACID

ANSWER :D
Discussion
33.

The IUPAC name for CH_(3) - CH_(2) - underset(CH_(3))underset(|)(CH) - CH_(2) - COCl is

Answer»

3-Methylpentanoylchloride
3-Methylbutanoylchloride
1-Chloro-3-ethylbutanone
1-Chloro-3-methyl pentanone

Solution :`UNDERSET(3-"Methylpentanoylchloride")(H_(3)overset(5)(C) - overset(4)(C)H_(2) - underset(CH_(3))underset(|)overset(3)(CH)- overset(2)(C)H_(2) - overset(O)overset(1||)(C) - CL)`
Discussion
34.

The IUPAC name for

Answer»

1-CHLORO-2-NITRO-4-methylbenzene
1-chloro-4-methyl-2-nitrobenzene
2-chloro-1-nitro-5-methylbenzene
m-nitro-p-chlorotoluene

Solution :In AROMATIC compound LEAST locants is given first priority. So alphabetically chloro, Methyl and than nitro group successively WRITTEN. So, 1-chloro-4-methyl-2-nitrobenzene is the correct name
Discussion
35.

The IUPAC naem of is…….and …….. Is main function group in it

Answer»

SOLUTION :NAME: Cyclohex-2-en-1-ol, `-OH`
Discussion
36.

The IUPAC naem of the compound is……

Answer»

3, 3-dimethyl-1-hydroxycyclohexane
1, 1-dimethyl-3-cyclohexanol
3, 3-dimethyl-1-cyclohexanol
1, 1-dimethyl-3-hydroxy cyclohexane

Solution :
Discussion
37.

The IUAPC name of the following compound is

Answer»

4-Bromo-3-cyanophenol
2-Bromo-3-hydroxybromobenzene
2-Cyano-4-hydroxybromobenzene
6-Bromo-3-hydrocybenzonitrile.

Solution :is the CORRECT IUPAC NAME.
Discussion
38.

The IUAC name of CH_(3) - undersetunderset(CH_(3))(|)oversetoverset(OH)(|)C-CH_(2) - undersetunderset(CH_(3))(|)CH - CH_(3) is

Answer»

2,3-Dimethyl PENTANOL -2
2,4-dimethyl pentanol - 4
2,2-Dimethyl BUTANOL -2
Butanol -2

ANSWER :A
Discussion
39.

The isotopic compostion fo rubidium is .^(85)Rb-72 per cent and .^(87)Rb-28 per cent. .^(87)Rb is weakly radioactive and decay by beta^(-) emission with a decay constant of 1.1xx10^(-11) per year. A sample of the mineral pollucite was found to contain 450 mg Rb and 0.72 mg of .^(87)Sr. Estimiate the age of mineral pollution, starting any assumption made.

Answer»

Solution :`.^(85)Rb = 72%`
`.^(87)Rb = 28% overset(K = 1.1xx10^(-11)yr^(-1))(rarr) ``.^(87)Sr`
SAMPLE contains `450 mg ``.^(87)Rb` and`0.72 mg .^(87)Sr`.
The AVERAGE ISOTOPIC mass of `Rb`
`= (72xx85+28xx87)/(100) = 85.56`
Now `0.72 mg` of `Sr` is formed `Rb`, following `beta-` emision thus,
Mass of `.^(87)Rb` LOST `= 0.72 mg`
Thus, initially the pollucite mineral contains
`Rb = 450 mg + 0.72 mg = 450.72 mg`
`.^(87)Rb` present of originally in it `= (28)/(100) xx 450.72`
`= 126.20 mg`
`.^(87)Rb` present at time`t = 126.20-0.72`
`= 125.48 mg`
Thus, `t = (2.303)/(1.1xx10^(-11))` log `(126.20)/(125.48)`
`= 5.202xx10^(8) yr`
Discussion
40.

The isotopic composition of rubidism is .^(85)Rb, 72% and .^(87)Rb 28% is weaklyradioactive and .^(87)Rb, 28%. .^(87)Rb si weakly radioactive and decays by beta- emission with a decayconstant of 1.1xx10^(-11) per year. A sample of the minearl pollucite was found to contain 450mg Rb and 0.72 mg of .^(87)Sr. Estimate the age of polluucite.

Answer»


ANSWER :`5.18xx10^(8)` YEAR
Discussion
41.

The isotopes of hydrogen are....

Answer»

Tritium and protium only
Deuterium and tritium only
Protium and deuterium only
Protium, deuterium and tritium

Solution :Hydrogen has three ISOTOPES : Protium : `._1H^1`, Deuterium : `._1H^2` , Tritium : `._1H^3`
Their natural ABUNDANCE is in ORDER H `gt` D `gt` T.
Discussion
42.

The siotopes of neutral atom of an element differ in

Answer»

ATOMIC number
Mass number
Number of electrons
Chemical properties

Answer :B
Discussion
43.

The isotopes of an element have

Answer»

same ATOMIC numbers
same atomic weights
different atomic numbers
different CHEMICAL properties.

Answer :A
Discussion
44.

The isomerism exhibited due to the difference in the size of the alkyl groups attached to the same functional group is

Answer»

Tautomerism
Stereo isomerism
Metamerism
Optical isomersims

Answer :C
Discussion
45.

The isomerism exhibited by n-propyl alcohol and isopropyl alcohol is

Answer»

Metamerism
Position
Functional
Tautomerism

Answer :B
Discussion
46.

The isomerism exhibited by alkyl cynide and alkyl isocynide is………

Answer»

FUNCTIONAL group
position ISOMER
SKELETAL isomerism
metamerism

Answer :A
Discussion
47.

The isomerisation of 1-butyne to 2-butyne can be achieved by treatment with

Answer»

hydrochloric acid
ammoniacal SILVER nitrate
ammoniacal cuprous chloride
ethanolic POTASSIUM HYDROXIDE

Solution :`underset"(LESS stable)"underset"1-Butyne"(CH_3-CH_2-C-=CH)overset(ALC. KOHDelta)hArr underset"(more stable)"underset"2-Butyne"(CH_3-C-=C-CH_3)`
Discussion
48.

The isomer of ethanol is ______

Answer»

ACETALDEHYDE
DIMETHYL ether
acetone
METHYL carbinol

Answer :D
Discussion
49.

The isomer of ethanol is ............. .

Answer»

acetaldehyde
dimethylether
acetone
methyl carbinol

Answer :B
Discussion
50.

The isomer of Cyclopentane is……… .

Answer»

Pent-1-ene
Pent-2-ene
2-methyl but -1-ene
All the GIVEN THREE options

Answer :D
Discussion