Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

51.

Which of the following compounds is commonly named is isobutyl iodide?A. (1) `CH_(3)CH_(2)CH_(2)CH_(2)I`B. (2) `(CH_(3))_(2)CHCH_(2)I`C. (3) `CH_(3)CHICH_(2)CH_(3)`D. (4) `(CH_(3))_(3)CI`

Answer» Correct Answer - B
Simple alkyl halides are sometimes given common names as alkyl derivatives of the hydrogen halides where the `H` of `HX` is being replaced by a suitable alkyl group. Compound (1) is `n`-butyl iodide, compound (2) is sec-butyl iodide, while compound (4) is tert-butyl iodide.
Discussion
52.

The `IUPAC` name of `CH_(3)COCH(CH_(3))_(2)` isA. 4-Methyl isopropyl ketoneB. 3-Methybutan-2-oneC. Isopropylmethyl ketoneD. 2-Methylbutan-3-one

Answer» Correct Answer - B
`{:(" O"),("1 2|| 3 4"),(CH_(3)-C-CH-CH_(3)),(" |"),(" "CH_(3)),(" 3-Methylbutan-2-one"):}`
Discussion
53.

Which of the following is incorrect regarding the alkanes?A. (1) All the bonds in the molecules of alkanes are sigma bonds.B. (2) The hybridization of every `C` atoms in alkanes is `sp^(3)`.C. (3) The bond angles at the `C` atoms of all alkanes are tetrahedral, i.e., `109.5^(@)`.D. (4) The rotation of group joined by a single bond usually requires a large amount of energy.

Answer» Correct Answer - D
A sigma bond (i.e., any non-multiple bond) has cylindrical symmetry along the bond with respect to the bonded atoms. Therefore, rotation is practically unhindered.
Discussion
54.

The correct structure for `3,3`-bis (`1,1`-dimethylethyl)-`2,2,4,4`-tetramethylpentane isA. (1) `CH_(3)underset(C_(2)H_(5))underset(|)(CH)-underset(C(CH_(3))_(3))underset(|)overset(C(CH_(3))_(3))overset(|)(C)-overset(C_(2)H_(5))overset(|)(CHCH_(3))`B. (2) `(CH_(3))_(2)overset(C_(2)H_(5))overset(|)(C)-underset(CH(CH_(3))_(2))underset(|)overset(CH(CH_(3))_(2))overset(|)(C)-overset(C_(2)H_(5))overset(|)(CH(CH_(3))_(2))`C. (3) `(CH_(3))_(3)C-underset(C(CH_(3))_(3))underset(|)overset(C(CH_(3))_(3))overset(|)(C)-C(CH_(3))_(3)`D. (4) `CH_(3)CH_(2)CH_(2)CH-underset(C(CH_(3))_(3))underset(|)overset(C(CH_(3))_(3))overset(|)(C)-CHCH_(2)CH_(2)CH_(3)`

Answer» Correct Answer - C
The most compact formula of the compound is `[(CH_(3))_(3)C]_(4)C`.
Discussion
55.

Which of the following orbital overlaps is involved in the formation of the carbon-carbon signle bond in the molecule `HC -= C - CH = CH_(2)` ?A. (1) `sp^(3) - sp^(3)`B. (2) `sp^(2) - sp^(3)`C. (3) `sp - sp^(2)`D. (4) `sp^(3) - sp`

Answer» Correct Answer - C
`C` formind the triple bond is `sp` hybridized while `C` forming the double bond is `sp^(2)` hybridized:
`HC-=overset(sp)(C)-overset(sp^(2))(C)=CH_(2)`
Discussion
56.

Give the IUPAC names of the following :

Answer» (i) 4-Cyclopentylbut-1-ene
(ii) Cyclohexylcycohexane
(iii) 2-Hydroxycyclohexanecarbonyl chloride
(iv) 2-(2-Methylcyclobut-1-enyl) ethanal
(v) 4-Cyclobutylbut-3-en-2one
(vi) 2-Ethyl-1,4-dimethylcyclohexane
(vii) 1-(4-hydroxycyhlohexyl)pentane-1,5-diol
(viii) 2-Isopropyl-5-methylcyclohexanol
(ix) 4-(4-Nitrocyclohexyl) benzaldehyde
(x) 2-Nitrocyclohexanecarboxamide.
Discussion
57.

The `IUPAC` name of neopentane isA. (1) `2`-methylbutaneB. (2) `2`-methylpropaneC. (3) `2`-ethylpropaneD. (4) `2,2`-dimethylpropane

Answer» Correct Answer - D
Prefix neo indicates the presence of a quaternary `C` atom:
`CH_(3)overset(2)-underset(.^(3)CH_(3))underset(|)overset(.^(1)CH_(3))overset(|)(C)-CH_(3)`
Discussion