Hydrocarbons

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

Hydrocarbon containing following bond is most reactive

1. C ≡ C

2. All of these

3. C-C

4. C = C

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

1. Ammonical silver nitrate

2. Bayers reagent

3. Fehling solution

4. Bromine water

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

1. Hydrogenation of oil

2. Ozonolysis

3. Hydration

4. Photolysis

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

1. 1, 1-dibromopropane

2. 1, 2-dibromoethane

3. 1, 4-dibromobutane

4. 2, 2-dibromobutane

Which one of these is not true for benzene?

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

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

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

4. It forms only one type of mono substituted product

Isopropyl bromide on Wurtz reaction gives

1. Neohexane

2. Hexane

3. Propane

4. 2, 3 – Dimethylbutane

The catalyst used in Friedel – Crafts reaction is

1. Ferric Chloride

2. Copper

3. Aluminium Chloride

4. Anhydrous Aluminium Chloride

The angle strain in cyclobutane is

1. 29°16

2. 9°44

3. 19°22

4. 24°44

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

1. 1, 2, 4-Trinitrobenzene

2. 1, 3-Dinitrobenzene

3. 1, 2-Dinitrobenzene

4. 1, 4-Dinitrobenzene

The coal tar fraction which contains phenol is:

1. Heavy Oil

2. Green Oil

3. Light Oil

4. Middle Oil

Alkyl halides react with dialkyl copper reagents to give?

1. Alkenes

2. Hydrogen

3. Alkanes

4. Carbon

Presence of a nitro group in a benzene ring

1. Deactivates the ring towards electrophilic substitution

2. Deactivates the ring towards nucleophilic 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. Soda lime decarboxylation

4. Kolbes electrolytic method

Which of the following compounds will exhibit geometrical isomerism?

1. 2 – Phenyl – 1 butene

2. 1, 1 – Diphenyl – propene

3. 3 – Phenyl – 1 – butene

4. 1 – Phenyl – 2 – butene

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

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

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

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

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

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-Dinitrobenzene

3. 1, 2, 4-Trinitrobenzene

4. 1, 3-Dinitrobenzene

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

1. But – 1– ene

2. Propene

3. But – 2 – ene

4. Ethene

2 – Phenylpropene on acidic hydration gives

1. 1 – Phenyl – 2 – propanol

2. 3 – Phenyl – 1 – propanol

3. 2 – Phenyl – 1 – propanol

4. 2 – Phenyl – 2 – propanol

The first fraction obtained during the fractionation of petroleum is:

1. Hydrocarbon Gases

2. Diesel Oil

3. Kerosene Oil

4. Gasoline

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

1. -C ≡ N

2. -SO₃H

3. -NO₂

4. -COOH

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Hydrocarbons

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