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Which of the following has highest melting point?

Option: 1

P


Option: 2

As


Option: 3

Sb


Option: 4

Bi


Answers (1)

best_answer

As we learn

Melting and Boiling Point do not show a regular trend due to difference in bonding type in metal and non-metals

Metal point is the factor which depends on the intermolecular forces. For melting down, we need to break the Van-der-wall forces between molecules. Nitrogen exists as N2 containing 2 moleclues while phosphorus exists as P4 ( 4 molecules). Energy required to break the Vanderwall force increases with the increase in number of moleclues.

As has metallic nature, due to increase in metallic nature of elements going down, e- become loose causing weak interaction. So, MP increases upto As and then decreases down.

Therefore, option (3) is correct.

Posted by

Riya

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