If on heating a liquid through `80^(0)C`, the mass explled is `(1)/(100)`th of mass still remaining, the coefficient of apparent expansion of the liquid is

Options

A. `1.25 xx 10^(-4)//""^@C`
B. `12.5 xx 10^(-4)//""^(@)C`
C. `1.25 xx 10^(-5)//""^(@)C`
D. None of these

Answer

A

Explanation

`gamma_(app) = ("Mass expelled")/("Mass remained " xx Delta T) = (x//100)/(x xx 80 ) = (1)/(8000)`
`= 1.25 xx 10^(-4) // ""^(@)C`.