An element (X) forms compounds of the formula XCl3, X2O5 and Ca3X2, but does not form XCl5. Which of the following is the element X?
(a) B
(b) Al
(c) N
(d) P
Correct Option (c) N
Explanation:
The element is N, which forms NCl3, N2O5 and Ca3N2, but does not form NCl5
