MCQs on Hydrocarbons for NEET

Group of compounds containing hydrogen and carbon are known as hydrocarbons. They may be straight-chain, branched or cyclic compounds. Hydrocarbons naturally occur in coal, natural gas and many polymers like polystyrene, polythene, etc. When a compound has all the C-C single bonds it is known as saturated hydrocarbon (alkanes) and when double or triple bonds are present between C-C, it is known as an unsaturated hydrocarbon (alkene, alkyne). Various other functional groups (halide, hydroxyl, aldehyde, carboxylic, etc.) may be attached to the carbon in hydrocarbons.

Also Check:

1. Find the correct order of increasing acidity

MCQs on Hydrocarbons 1

2. Identify Z in the given reaction:

MCQs on Hydrocarbons 2

3. The product obtained on heating 2-Bromopentane with potassium ethoxide in ethanol is

(a) 1-pentene

(b) 2-cis-pentene

(c) trans-2-pentene

(d) 2-ethoxy pentane

Answer: (c)

4. Choose the process by which liquid hydrocarbons can be converted to gaseous hydrocarbons

(a) hydrolysis

(b) oxidation

(c) cracking

(d) distillation under reduced pressure

Answer: (c)

5. Which one of the following halide can be used in the Friedel-Crafts reaction?

(a) Isopropyl chloride

(b) Bromobenzene

(c) Chlorobenzene

(d) Chloroethene

Answer: (a)

6. Which one of the following compound forms salt on reaction with NaNH2?

(a) C2H2

(b) C2H6

(c) C6H6

(d) C2H4

Answer: (a)

7. Which among the following reagent can be used to distinguish between CH2BrCH=CH2 from CH3CH=CHBr?

(a) Br2/CCl4

(b) cold KMnO4

(c) AgNO3/C2H5OH

(d) Ag(NH3)2OH

Answer: (c)

8. Isopropyl iodide is formed after reaction of propene with HI, this is due to

(a) more stable free radical

(b) homolysis

(c) more stable carbanion

(d) more stable carbocation

Answer: (d)

9. C6H5CHO is formed when C6H6 is treated with CO and HCl in the presence of anhydrous AlCl3. Name of the reaction is:

(a) Friedel crafts reaction

(b) Gattermann Koch reaction

(c) Rosenmund reaction

(d) Stephen reaction

Answer: (b)

10. A compound having a bond angle 180° is

(a) alkyne

(b) alkane

(c) alkene

(d) cycloalkane

Answer: (a)

 

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