Give the ratio in which hydrogen and oxygen are present in water by volume.
(a) 1:2
(b) 1:1
(c) 2:1
(d) 1:8

Dear student,

The formula of water is H2O which indicates that two volume of hydrogen and one volume of oxygen forms water.
Hence, the ratio of hydrogen to oxygen is 2:1. 

Hence, the correct option is (c).

Regards

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