A compound on treatment with NaOH followed by addition of 3Ag NO produces white precipitate at room temperature.The precipitate is soluble in NH OH₄. The compound is identified as

vinyl chloride
benzyl chloride
chlorobenzene
ethyl bromide

Solution

Halides Cl^-,Br^-,I^- React with AgNO₃ to give

AgCl → soluble in NH₄OH

AgBr → spraringly soluble in NH₄OH

AgI → Insoluble and the C – Cl bond is weakest in benzyl chloride [(sp³) hybridised carbon is attached to Cl]

Benzene hexachloride is

1, 2, 3, 4,5, 6-hexachlorocyclohexane
1, 1, 1, 6, 6, 6-hexachlorocyclohexane
1, 6-phenyl-1, 6-chlorohexane
1, 1-phenyl-6, 6-chlorohexane

The compound which contains all the four 1°, 2°,3° and 4°carbon atoms is

2, 3-dimethyl pentane
3-chloro-2, 3 dimethylpentane
2, 3, 4-trimethylpentane
3,3-dimethylpentane

Solution

Which one of the following is least reactive in a nucleophilic substitution reaction?

CH₃CH₂Cl
CH₂= CHCH₂Cl
(CH₃)₃ C – Cl
CH₂= CHCl

Solution

How many structural isomers are possible for a compound with molecular formula C₃H₇Cl

Full name of DDT is

1, 1, 1-trichloro-2, 2-bis(p-chlorophenyl) ethane
1, 1-dichloro-2, 2-diphenyl trimethylethane
1, 1-dichloro-2, 2-diphenyl trichloroethane
None of these

Solution

When two halogen atoms are attached to same carbon atomthen it is :

vic-dihalide
gem-dihalide
∝,ω-halide
∝,β-halide

Solution

Gem dihalides on treatment with alcoholic KOH give :

alkyne
alkene
alkane
all of these

Solution

Gem dihalides on treatment with alcoholic KOH gives alkyne as follows :

The total number of acyclic isomers including the stereoisomers with the molecular formula C₄H₇Cl

Solution

Under basic conditions which one suffers elimination the most

(CH₃)₃CCl
CH₃CH₂CH₂–CH₂–Cl

Solution

In basic conditions, the reactivity by elimination increases from 1° carbocation to 3° carbocation. So, (CH₃)₃CCl suffers elimination the most among the given choices.

Note:Elimination reactions are of two types E₁ and E₂.Reactivity by E₁ and E₂ mechanism increases in the same order but due to different reasons. The rate of E₂ depends upon the concentration of base and rate of E₁ depends upon the nature of base.

Here we can not decide whether the reaction is proceed via E₁ mechanism or E₂ mechanism because nothing is given about the basic conditions.

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