Hydrocarbons

What products are formed when the following compound is treated with Br2 in the presence of FeBr3? [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?

1. -COOH
2. -NO2
3. -C N
4. -SO3H

Which of the following compounds will not undergo Friedel-Crafts reaction easily?

1. Nitrobenzene
2. Toluene
3. Cumene
4. Xylene

Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80-100 C forms which one of the following products?

1. 1, 4-Dinitrobenzene
2. 1, 2, 4 - Trinitrobenzene
3. 1, 2-Dinitrobenzene
4. 1, 3-Dinitrobenzene

Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?

1. NaNH2
2. HCl
3. O2
4. Br2

Among the following compounds the one that is most reactive towards electrophilic nitration is

1. benzoic acid
2. nitrobenzene
3. toluene
4. benzene

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

1. oxidation
2. cracking
3. distillation under reduced pressure
4. hydrolysis

Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form

1. chlorobenzene
2. benzyl chloride
3. xylene
4. toluene.

Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4. In the mixture, nitric acid acts as a/an

1. acid
2. base
3. catalyst
4. reducing agent

H3C- CH3 |CH-CH=CH2 + HBr A A (predominantly) is

1. CH3- Br |CH- CH3 |CH-CH3
2. CH3- CH3 |CH- Br |CH-CH3
3. CH3- CH3 |CH-CH2-CH2Br
4. CH3- Br | CH3 |C-CH2CH3