Integer Answer Type Questions for JEE: Haloalkanes & Haloarenes

Q.1. 1,2-dibromopropane on treatment with X moles of NaNH₂ followed by treatment with ethyl bromide gave a Pentyne, the value of X is

Ans. 3

Q.2.

With excess NaI, how many halogens in the given compound can be substituted (SN) with reasonable speed.

Ans. 3
Halogens attached to sp² hybridized carbon cannot undergo Nucleophilic substitution easily. Even the bridge-head halogen cannot be substituted.

Q.3. Perchloroethane is C₂Cl_x where x is ______

Ans. 6
Hexachloroethane, also known as perchloroethane (PCA), C₂Cl₆, is a white crystalline solid at room temperature with a camphor-like odor. It has been used by the military in smoke compositions, such as base-eject smoke munitions.

Q.4. A polyhydric alcohol is benzoylated using benzoyl chloride in the presence of NaOH to give benzoyl derivative of mol. Mass 404.  What is the number of -OH groups in this alcohol?

Ans. 3

i.e. H (Mol. Wt. = 1) is replaced by  group (mol. Wt.
= 105) i.e., there is ncreases to 104 in mol. Wt. per OH group.
∴ No. of OH groups

Q.5. The number of different types of alkene obtained by the reaction of 2-Bromobutane with C₂H₅O Na in presence of C₂H₅OH  is.

Ans. 2

Q.6. How many number of product are possible for the following reaction?

Ans. 3

Q.7.

With excess NaI, how many halogens in the given compound can be substituted (S_N) with resonable speed.

Ans. 3
Halogens attached to sp² hybridised carbon cannot undergo nucleophilic substitution. Even the bridge-head halogen cannot be substituted.

Q.8. In the following reaction, how many carbon atom are present in X compound,

Ans. 6

Q.9. In the following reaction sequence, how many carbon atom are present in z compound,

Ans. 6

Q.10. The number of substitution products formed when metabromo anisole is treated with KNH₂/ NH₃.

Ans. 3