Hydrocarbons

The number of chlorine atoms present in the organic products X and Y of the following reactions, respectively are : [figure]

1. 3 and 3
2. 6 and 6
3. 6 and 3
4. 3 and 6

Among the following, the reaction that proceeds through an electrophilic substitution, is :

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

Consider the nitration of benzene using mixed conc. H2SO4 and HNO3. If a large amount of KHSO4 is added to the mixture, the rate of nitration will be

1. unchanged
2. doubled
3. faster
4. slower

Which of the following can be used as halide component for Friedel-Crafts reaction?

1. Chlorobenzene
2. Bromobenzene
3. Chloroethene
4. Isopropyl chloride

In the given reaction, [figure] the product P is

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

The oxidation of benzene by V2O5 in the presence of air produces

1. maleic anhydride
2. benzoic acid
3. benzaldehyde
4. benzoic anhydride.

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

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

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

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

The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol

1. (ii) > (iv) > (i) > (iii)
2. (iv) > (iii) > (ii) > (i)
3. (iv) > (ii) > (i) > (iii)
4. (i) > (ii) > (iii) > (iv)

Using anhydrous AlCl3 as catalyst, which one of the following reactions produces ethylbenzene (PhEt)?

1. H3C-CH2OH + C6H6
2. CH3-CH=CH2 + C6H6
3. H2C=CH2 + C6H6
4. H3C-CH3 + C6H6

The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II) and nitrobenzene (III) is

1. III > II > I
2. II > III > I
3. I < II > III
4. I > II > III

Increasing order of electrophilic substitution for following compounds [figure]

1. IV < I < II < III
2. III < II < I < IV
3. I < IV < III < II
4. II < III < I < IV

In Friedel-Crafts reaction, toluene can be prepared by

1. C6H6 + CH3Cl
2. C6H5Cl + CH4
3. C6H6 + CH2Cl2
4. C6H6 + CH3COCl