Question

A diatomic gas belonging to group 15 combines with a halogen to form a trihalides which is fairly stable and inert. The trihalide is
A. `NCl_(3)`
B. `PCl_(3)`
C. `BiF_(3)`
D. `NF_(3)`

Answer 1

Correct Answer - D
Out of all the group 15 elements it is nitrogen which is a gas and is diatomic in nature. Rest of the elements are solid and exist as tetratomic. Further out of all the halides of N, it is `NF_(3)` which is fairly stable. Rest of the halides `NCl_(3), NBr_(3),NI_(3)` etc are unstable.