7. Density of ice is

ρ and that of water is σ . What will be the decrease in volume when a mass M of ice melts

(a) M/( σ – ρ )                                               (b) ( σ – ρ ) /M

(c) M[(1/ρ/) -(1/σ)]                                      (d)  [1/M][(1/ρ/) -(1/σ)]

Answer-c

(17)