Question

state the names and symbols of the elements present in the following compounds : (State the formulae) (1) Quicklime (2 ) Baking powder (3) Ferous sulphide (4) Hydrogen peroxide

Answer 1

$1. \: quicklime \: contains \: calcium \: and \\ oxygen \: \\ 2. \: baking \: powder \: contains \: sodium \\ hydrogen \: and \: carbonate \\ 3. \: ferrous \: sulphide \: contains \: iron \\ and \: sulphur \\ 4. \: hydrogen \: peroxide \: contains \: hydrogen \\ and \: oxygen.$
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Answer 2

1) Quick lime - Calcium oxide , CaO
2) Baking powder - sodium hydrogecarbonate, NaHCO3.
3) Ferrous sulphide - FeSO4
4) Hydrogen peroxide - H2O2