1.

The volume of 4 N HCl and 10 N HCl required to make 1 litre of 6 N HCl are

Answer»

0.75 litre of 4 N HCL and 0.25 litre of 10 N HCl
0.25 litre of 4 N HCl and 0.75 litre of 10 N HCl
0.67 litre of 4 N HCl and 0.33 litre of 10 N HCl
0.80 litre of 4 N HCl and 0.20 litre of 10 N HCl

Solution :Suppose x L of 4 N HCl are taken. Then 10 N HCl taken `=(1-x)L`. Applying
`N_(1)V_(1)+N_(2)V_(2)=N_(3)V_(3)`
`4 xx x+10(1-x)=6xx1`
`"or"6x=4"or"x=(4)/(6)=0.67L`


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