CBSE Class 10 Answered

Hydrogenation is a chemical reaction between molecular hydrogen (H₂) and another compound or element, usually in the presence of a catalyst. The process is commonly employed to reduce or saturate organic compounds.

Hydrogenation of unsaturated fats produces saturated fats. 

All kinds of animal fat contain saturated fatty acids which are harmful for health. In plants only palm oil and coconut oil has saturated fatty acids.

Saturated fatty acids increase the production of acetate fragments which in turn increase the production of cholesterol. Saturated fatty acids form clumps with protein and cholesterol that block the blood vessels and can cause heart attack. It also leads to the obesity because it gets deposited in blood cells and organs. It also increases the chances of breast and colon cancer.