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# Coefficient of real expansion of mercury is $\;0.18\times 10^{-3}/^{0}C\;$ . If the density of mercury at $\;0^{0}C\;$ is $\;13.6\;gm/C.C\;$ , then is density at 473 K will be

$(a)\;13.11\;g/C.C\qquad(b)\;13.65\;g/C.C\qquad(c)\;13.51\;g/C.C\qquad(d)\;13.22\;g/C.C$