Chemistry

SN2 mechanism proceeds through intervention of

Options

(a) carbonium ion (b) transition state (c) free radical (d) carbanion

Correct Answer:

transition state

Explanation:

S(N)2 mechanism proceeds through transition state. e.g. When the methyl chloride […]

In the reaction of phenol with CHCl₃ and aq.KOH the electrophile attacking the ring is

Options

(a) CHCl₃ (b) CHCl₂ (c) :CCl₂ (d) COCl₂

Correct Answer:

:CCl₂

Explanation:

The electrophile is dichloromethylene :CCl₂ […]

AgNO₃ does not give precipitate with CHCl₃ because

Options

(a) CHCl₃ does not ionise in water (b) AgNO₃ does not reacts with (c) CHCl₃ is chemicaly inert (d) none of these

Correct Answer:

CHCl₃ […]

Which of the following possesses highest melting point

Options

(a) Chlorobenzene (b) m-Dichlorobenzene (c) o-Dichlorobenzene (d) p-Dichlorobenzene

Correct Answer:

p-Dichlorobenzene

Explanation:

No explanation available. Be the first to write the explanation for this […]

When acetone reacts with bleaching powder, the compound formed is

Options

(a) CCl₄ (b) CHCl₃ (c) CH₃CHO (d) CH₃COOH

Correct Answer:

CHCl₃

Explanation:

It involves two steps: CaOCl₂(Bleaching powder) + H₂O → Ca(OH)₂ […]

When chloroform is exposed to light and air, it forms

Options

(a) chlorine gas (b) methyl chloride (c) phosgene gas (d) carbon tetrachloride

Correct Answer:

phosgene gas

Explanation:

No explanation available. Be […]

Carbylamine test is performed in alcoholic KOH by heating a mixture of

Options

(a) chloroform and silver powder (b) an alkyl cyanide and a primary amine (c) an alkyl halide and a primary […]