At a given temperature , the ratio of kinetic energies of 3 g of hydrogen and 4g of oxygen

Options

A. `1:12`
B. `4:3`
C. `12:1`
D. `3:4`

Answer

C

Explanation

For two gases, temperature is same.
Ratio of K.E `{{:("No . of moles "),(of H_2 : No . of ),("moles of " O_2):}`
`=(3g " of " H_2)/2.(4g " of " O_2)/32`
`=3/2:4/32`
`=3/2:1/8
`=12:1`