The volumes of `4N HCI` and `10 N HCI` required to make 1 litre of `6N HCI` are

Options

A. 0.75 litre of 10 NHCl and 0.25 litre of 4NHCl
B. 0.50 litre of 4NHCl and 0.50 litre of10 NHCl
C. 0.67 litre of 4 NHCl and 0.33 litre of 10 NHCl
D. 0.80 litre of 4NHCl and 0.20 litre of 10 NHCl

Answer

C

Explanation

`N_1V_1 + N_2V_2 = NV`
`4x + 10(1 -x) = 6 xx 1 , -6 x = -4 , x = 0.67`
Thus 0.67 litreof 4NHCl
1-x = 1 - 0.67 = 0.33 litre of 10NHCl