Hydrocarbons

2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?

1. (CH3)3CCH=CH2
2. (CH3)2C=CHCH2CH3
3. (CH3)2CHCH2CH=CH2
4. (CH3)2CH- CH3 |CH-CH=CH2

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

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

A single compound of the structure, [figure] is obtainable from ozonolysis of which of the following cyclic compounds?

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

The reaction of C6H5CH=CHCH3 with HBr produces

1. C6H5CH2CH2CH2Br
2. [figure]
3. C6H5 Br |CHCH2CH3
4. C6H5CH2 Br |CHCH3

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

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)

Predict the product C obtained in the following reaction of 1-butyne. CH3CH2-C CH + HCl B HI C

1. CH3-CH2-CH2- Cl | I |C-H
2. CH3-CH2- I |CH-CH2Cl
3. CH3CH2- Cl | I |C-CH3
4. CH3- Cl |CH-CH2CH2I

Which of the compound with molecular formula C5H10 yields acetone on ozonolysis?

1. 3-Methyl-1-butene
2. Cyclopentane
3. 2-Methyl-1-butene
4. 2-Methyl-2-butene

The correct order regarding the electronegativity of hybrid orbitals of carbon is

1. sp < sp2 < sp3
2. sp > sp2 < sp3
3. sp > sp2 > sp3
4. sp < sp2 > sp3

Which one of the following alkenes will react faster with H2 under catalytic hydrogenation conditions ?

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

Products of the following reaction : CH3C CCH2CH3 [(ii) hydrolysis](i) O3 are

1. CH3COOH + CO2
2. CH3COOH + HOOC.CH2CH3
3. CH3CHO + CH3CH2CHO
4. CH3COOH + CH3COCH3

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

Reaction of HBr with propene in the presence of peroxide gives

1. isopropyl bromide
2. 3-bromopropane
3. allyl bromide
4. n-propyl bromide

The compound CH3- CH3 |C=CH-CH3 on reaction with NaIO4 in the presence of KMnO4 gives

1. CH3COCH3
2. CH3COCH3 + CH3COOH
3. CH3COCH3 + CH3CHO
4. CH3CHO + CO2

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

When CH3CH2CHCl2 is treated with NaNH2, the product formed is

1. CH3-CH=CH2
2. CH3-C CH
3. [figure]
4. [figure]

Which alkene on ozonolysis gives CH3CH2CHO and CH3COCH3?

1. [figure]
2. CH3CH2CH=CHCH2CH3
3. CH3CH2CH=CHCH3
4. [figure]

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