Write the formulae of the following compounds. Also name the elements present in them.

(a) Water


(b) Ammonia


(c) Methane


(d) Sulphur dioxide


(e) Ethanol.

(a) Water- H2O; As conveyed by the formula, elements present are hydrogen and oxygen.

(b) Ammonia-NH3; As conveyed by the formula, elements present are nitrogen and hydrogen.


(c) Methane-Ch4; As conveyed by the formula, elements present are carbon and hydrogen.


(d) Sulphur dioxide-SO2; As conveyed by the formula, elements present are sulphur and oxygen.


(e) Ethanol-C2H5OH; As conveyed by the formula, elements present are carbon, hydrogen and oxygen.


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