Question

(a) Give a chemical test to distinguish between saturated and unsaturated hydrocarbons. (b) Name the products formed when ethanol burns in air. List two forms of energy that are liberated on burning ethanol. (c) Why is the reaction between methane and chlorine considered a substitution reaction ?

Answer 1

Answer:

dont know can you help me in this question

Answer 2

Hello Dear,

◆ Answers -

(a) Bromine water test is used to distinguish between saturated and unsaturated hydrocarbons.

• Saturated hydrocarbon + Br2 water --> No reaction
• Unsaturated hydrocarbon + Br2 water --> Decolorization

(b) When ethanol is burnt in air, carbon dioxide and water are formed.

C2H5OH + 3.5O2 --> 2CO2 + 3H2O

Products formed -

• Carbon dioxide
• Water

Energies involved -

• Heat energy
• Light energy

(c) In a reaction of methane and chlorine, H is displaced by Cl. Hence, it is called substitution reaction.

CH4 + Cl2 --> CH3Cl + HCl

Thanks dear...