Electrical wires have a coating of an insulating material. The material generally used is

Write true or false for the following statement:
Saturated hydrocarbons will generally give a clean flame,while unsaturated carbon compounds will give a yellow flame with lots of black smoke.

Why are carbon and its compounds used as fuels for most applications?

Which process is used to convert vegetable oil into vegetable ghee?

Explain the given reactions with examples:
$(a)$ Hydrogenation reaction
$(b)$ Oxidation reaction
$(c)$ Substitution reaction

Why should we prefer vegetable oils over animal fats for cooking food? Give a balanced chemical equation for the reaction for hydrogenation of vegetable oils. Name the catalysts in this reaction.