Which of the following elements has the lowest melting point?

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Solution

The correct option is D Sn
Sn has the lowest melting point. On moving from top to bottom in C family, the melting point decreases. The decreasing order of melting point is $C > S i > G e > P b > S n$ .
Note: The melting point of Pb is higher than that of Sn.
C and Si form giant molecules. So they have very high melting points.

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