1.

Density of ice is \[\rho \] and that of water is \[\sigma \]. What will be the decrease in volume when a mass M of ice melts

A.            \[\frac{M}{\sigma -\rho }\]   
B.            \[\frac{\sigma -\rho }{M}\]   
C.            \[M\,\left[ \frac{1}{\rho }-\frac{1}{\sigma } \right]\]           
D.            \[\frac{1}{M}\left[ \frac{1}{\rho }-\frac{1}{\sigma } \right]\]
Answer» D.            \[\frac{1}{M}\left[ \frac{1}{\rho }-\frac{1}{\sigma } \right]\]


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