The magnetic susceptibility of a paramagnetic substance at `-73^@C` is `0*006`. What will be its value at `-173^@C`?

Options

A. 0.003
B. 0.0012
C. 0.012
D. 0.041

Answer

C

Explanation

As we know, `chi_(m) prop 1/T`
`rArr chi_(2)/chi_(1) = T_(1)/T_(2)`
`chi_(m)/(0.0060) = (273-73)/(273-173) = 2`
`chi_(m) = 0.0120`