Hydrocarbons

These MCQs are intended for checking your Chemistry subject, Chapter Hydrocarbons knowledge.

The catalyst used in Friedel – Crafts reaction is

1. Ferric Chloride

2. Anhydrous Aluminium Chloride

3. Aluminium Chloride

4. Copper

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

1. -COOH

2. -C ≡ N

3. -NO₂

4. -SO₃H

The order of decreasing reactivity towards an electrophilic reagent, for the following : (i) Benzene (ii) Toluene (iii) Chlorobenzene (iv) Phenol would be:

1. (iv) > (iii) > (ii) > (i)

2. (i) > (ii) > (iii) > (iv)

3. (ii) > (iv) > (i) > (iii)

4. (iv) > (ii) > (i) > (iii)

Isopropyl bromide on Wurtz reaction gives

1. Neohexane

2. Hexane

3. 2, 3 – Dimethylbutane

4. Propane

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

1. 1, 4-Dinitrobenzene

2. 1, 3-Dinitrobenzene

3. 1, 2-Dinitrobenzene

4. 1, 2, 4-Trinitrobenzene

The angle strain in cyclobutane is

1. 24°44

2. 19°22

3. 9°44

4. 29°16

The position of double bond in alkenes can be located by :

1. Photolysis

2. Hydration

3. Ozonolysis

4. Hydrogenation of oil

A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is ______.

1. 1, 2-dibromoethane

2. 1, 1-dibromopropane

3. 1, 4-dibromobutane

4. 2, 2-dibromobutane

The first fraction obtained during the fractionation of petroleum is:

1. Gasoline

2. Diesel Oil

3. Kerosene Oil

4. Hydrocarbon Gases

Hydrocarbon containing following bond is most reactive

1. All of these

2. C ≡ C

3. C = C

4. C-C

The coal tar fraction which contains phenol is:

1. Middle Oil

2. Heavy Oil

3. Green Oil

4. Light Oil

Which one of these is not true for benzene?

1. There are three carbon-carbon single bonds and three carbon-carbon double bonds

2. Heat of hydrogenation of benzene is less than the theoretical value

3. The bond angle between carbon-carbon bonds is 120 Degree

4. It forms only one type of mono substituted product

Alkyl halides react with dialkyl copper reagents to give?

1. Hydrogen

2. Alkenes

3. Carbon

4. Alkanes

Presence of a nitro group in a benzene ring

1. Deactivates the ring towards nucleophilic substitution

2. Deactivates the ring towards electrophilic substitution

3. Activates the ring towards electrophilic substitution

4. Renders the ring basic

Pure methane can be prepared by

1. Wurtz reaction

2. Reduction with H₂

3. Kolbes electrolytic method

4. Soda lime decarboxylation

The lowest alkene, that is capable of exhibiting geometrical isomerism is

1. But – 1– ene

2. But – 2 – ene

3. Ethene

4. Propene

2 – Phenylpropene on acidic hydration gives

1. 3 – Phenyl – 1 – propanol

2. 1 – Phenyl – 2 – propanol

3. 2 – Phenyl – 1 – propanol

4. 2 – Phenyl – 2 – propanol

The compound C₃H₄ has a triple bond, which is indicated by its reaction with

1. Ammonical silver nitrate

2. Fehling solution

3. Bromine water

4. Bayers reagent

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

1. 1, 3-Dinitrobenzene

2. 1, 4-Dinitrobenzene

3. 1, 2, 4-Trinitrobenzene

4. 1, 2-Dinitrobenzene

Which of the following compounds will exhibit geometrical isomerism?

1. 1, 1 – Diphenyl – propene

2. 1 – Phenyl – 2 – butene

3. 3 – Phenyl – 1 – butene

4. 2 – Phenyl – 1 butene

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Hydrocarbons

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