Name two ores of Cu and give chemical formula.

Name two principal ores and give chemical formula. Aluminium.

Name two principal ores and give chemical formula. Iron.

Define chemical formula ?

Name two ores of magnesium.

Write chemical formula of “rust.

A silver articles generally turns black when kept in the open for a few days. Name the black substance formed and give its chemical formula.

A white chemical compound becomes hard on mixing proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound and give its chemical formula.

Give two ores of Zinc.

Give two ores of Zinc.