A) \[\frac{M}{\sigma -\rho }\]
B) \[\frac{\sigma -\rho }{M}\]
C) \[M\,\left[ \frac{1}{\rho }-\frac{1}{\sigma } \right]\]
D) \[\frac{1}{M}\left[ \frac{1}{\rho }-\frac{1}{\sigma } \right]\]
Correct Answer: C
Solution :
Volume of ice \[=\frac{M}{\rho }\], volume of water \[=\frac{M}{\sigma }\] . \ Change in volume \[=\frac{M}{\rho }-\frac{M}{\sigma }=M\,\left( \frac{1}{\rho }-\frac{1}{\sigma } \right)\]
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