A mixture of CH4 and C2H6 (both are gases) has a total pressure of 0.53 atm. Just enough O2 is added to the mixture to bring about complete combustion of each reactant to gaseous products. The total pressure of the product gases is 2.2 atm. Assuming constant volume and temperature, find the mole fraction of CH4 in the mixture.

Reduction

Explanation: Reduction is a chemical reaction in which electrons are gained and thus there is a decrease in the oxidation number.

Oxidation is a chemical reaction in which electrons are lost and thus there is a increase in the oxidation number.

This is an example of reduction reaction as the oxidation number of gold has decreased from +3 to zero as the electrons are gained.