Write the chemical name of the following and also give their molecular formulae :
(a) Baking soda
(b) Vinegar
(c) Marble
(d) Sand
(a) Sodium bicarbonate (Baking soda) — NaHCO3
(b) Acetic acid (Vinegar) — CH3COOH
(c) Calcium carbonate (Marble) — CaCO3
(d) Silicon dioxide (Sand) — SiO2