HYDROCARBONS JEE

The hydrocarbon which can react with sodium in liquid ammonia is

(1) CH₃CH₂C ≡ CCH₂CH₃

(2) CH₃CH₂CH₂C ≡ CCH₂CH₂CH₃

(3) CH₃CH₂C ≡ CH

(4) CH₃CH ≡ CHCH₃

• 1

• 2

• 3

• 4

Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?

(1) Ethyl acetate

(2) Acetic acid

(3) Acetamide

(4) Butan-2-one

• 1

• 2

• 3

• 4

Polysubstitution is a major drawback in

(a) Reimer-Tiemann reaction

(b) Friedel-Crafts acylation

(c) Friedel-Crafts alkylation

(d) Acetylation of aniline.

• 1

• 2

• 3

• 4

In the presence of peroxide, HCl and HI do not give anti-Markovnikov’s addition to alkenes because

(1) All the steps are exothermic in HCl and HI

(2) One of the steps is endothermic in HCl and HI

(3) HCl is oxidizing and the HI is reducing

(4) Both HCl and HI are strong acids

• 1

• 2

• 3

• 4

The reagent needed for converting

is

• H₂ / lindlar Cat.

• Catalytic Hydrogenation

• LiAlH₄

• Li/ NH₃

The gas evolved on heating CH₃MgBr in methanol is

(1) methane

(2) ethane

(3) propane

(4) HBr

• 1

• 2

• 3

• 4

Which one of the following has the minimum boiling point?

(1) n-Butane

(2) 1-Butyne

(3) 1-Butene

(4) Isobutene

• 1

• 2

• 3

• 4

In the hydroboration – oxidation reaction of propene with diborane, H₂O₂ and NaOH, the organic compound formed is :

(1) CH₃CH₂CH₂OH

( 2) (CH₃)₃COH

(3) CH₃CHOHCH₃

(4) CH₃CH₂OH

• 1

• 2

• 3

• 4

The number and type of bonds in C₂^2- ion in CaC₂ are:

(1) Two σ bonds and one π – bond

(2) Two σ bonds and two π – bonds

(3) One σ bond and two π – bonds

(4) One σ bond and one π bond

• 1

• 2

• 3

• 4

In the given transformation, which of the following is the most appropriate reagent?

• NaBH₄

• NH₂-NH₂, OH

• Zn – Hg / HCl

• Na, Liq.NH₃