`CO_(2)` is gas. Justify the given statement by two reasons.

The number of carbon compounds is more than those formed by all other elements put together. Justify the statement by giving two reasons.

Water is a compound and not a mixture. Justify the statement giving two reasons.

Complete pure lines almost never occur's. Justify the statement giving two reasons.

Population explosion is major problem facing India. Justify the statement with reasons.

Alkynes are unsaturated hydrocarbons. Justify this statement giving two reasons.

Ecological pyramids have limitations. Justify the statement with three reasons,