The magnetic susceptibility of a paramagnetic substance at `- 173 .^(@)C` is `1.5 xx 10^(-2)` then its value at

Options

A. `0.0030`
B. `0.0120`
C. `0.0180`
D. `0.0045`

Answer

B

Explanation

`chi_(m) prop (1)/(T)`
`rArr (chi_(2))/(chi_(1)) = (T_(1))/(T_(2)) rArr (chi_(2))/(0.0060) = (273- 73)/(273- 173) = (200)/(100)= 2`
`rArr chi_(2) = 2 xx 0.0060 = 0.0120`