Halo alkanes and haloarenes

In the following sequence of reactions

CH₃CH₂CH₂Br+ (alc) KOH →(A) + HBr → (B) + (aq) KOH → (C).

The product (C) is

• propan-2-ol

• propan-1-ol

• propyne

• propene

The compounds used as refrigerant are

• NH3

• CCl4

• CF4

• CF2Cl2

• CH2F2

Benzyl chloride (C₆H₅CH₂Cl) can be prepared from toluene by chlorination With

• SO₂Cl₂

• Cl₂ /Fe

• Cl₂ /hv

• NaOCl

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

• the formation of less stable phenyl cation.

• partial double bond character of C–X bond due to resonance.

• shorter carbon-halogen bond due to more s-character of carbon(sp2)

• all of these.

The correct order of the thermal stability of hydrogen halides (H–X) is

• HF > HCl > HBr > HI

• HI > HBr > HCl > HF

• HI > HCl < HF > HBr

• HCl < HBr > HBr < HI

The order of reactivity of following alcohols with halogen acids is ___________.

(A) Propan-1-ol (B) Butane-2-ol (C) 2-Methyl butan-2-ol

• A<B<C

• A<C<B

• C<B<A

• B<A<C

Which of the following is an example of vic-dihalide?

• Dichloromethane

• 1,2-dichloroethane

• Ethylidene chloride

• Allyl chloride

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl₃ . Which

of the following species attacks the benzene ring in this reaction ?

• Cl^-

• Cl⁺

• AlCl₃

• [AlCl₄ ]^-

Which is the correct increasing order of boiling points of the following compounds?

1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane

• Butane < 1-Chlorobutane < 1-Bromobutane < 1-Iodobutane

• 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane < Butane

• Butane < 1-Iodobutane < 1-Bromobutane < 1-Chlorobutane

• Butane < 1-Chlorobutane < 1-Iodobutane < 1-Bromobutane