Question

explain the combustion and substitution reaction in the carbon compound taking example of Methane​

Answer 1

combustion

It is the process of burning in the presence of oxygen and produce heat and light.

saturated substance burn with a non sooty and blue flame while unsaturated substance burn with a sooty and yellow flame .

example: CH4 + O2= Co2+ H2O

Substitution reaction

The reaction in which one functional group replaced by an another functional group in a compound is called substitution reaction .

example:CH4 + Cl2 = CH3Cl + HCl

Answer 2

Substitution and combustion reaction are explained below by given examples:

Explanation:

• substitution reaction:

• CH4 (methane) +Br2  -----> CH3Br (methylbromide)+HBr (hydrogenbromide)

• Here we can see one of the hydrogen atom of methane is substitutes by bromine atom.

• Methane undergoes substitution with halogens in the presence of sun light.

• Decreasing order of halogens towards reaction with alkanes are:

• F2> Cl2>Br2>I2          

• combustion reaction :

• Combustion reaction means burning when methane and oxygen reacts they form carbondioxide ,water and large amount of energy

• CH4 +O2 --------------> CO2 +2H2O + ENERGY

• This shows that methane burning is possible.