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Question

In group 15, the melting points of the elements :
  1. Increase regularly on moving down the group
  2. Decrease regularly on moving down the group
  3. First decrease upto As and then increase to Bi
  4. First increase from N to As and then decrease to Bi

A
Increase regularly on moving down the group
B
Decrease regularly on moving down the group
C
First decrease upto As and then increase to Bi
D
First increase from N to As and then decrease to Bi
Solution
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ElementMelting point
N63 K
P317 K
As1089 K
Sb904 K
Bi544 K

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