At S.T.P. the ratio of volumes occupied by 1 mole of each `O_(2)` and `CO_(2)` gases , respectively , is `”______”`
A. `4 :1`
B. ` 1: 4`
C. `1: 2`
D. `1 : 1`
A. `4 :1`
B. ` 1: 4`
C. `1: 2`
D. `1 : 1`
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Correct Answer – D
At S.T.P all gases of one mole occupies equal volume of 22.4 litre .
`therefore` Ratio of their volumes is `1 :1`.