gneet

Study Companion

For more NEET and AIIMS mcq on s - block elements Visit www.gneet.com
Question
Q106) A metal X on heating in nitrogen gas gives Y, Y on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a blue colour. Y is .. [ DEC 2000]




SOLUTION

3Mg + N2 → Mg3N2
Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH2
CuSO4 + 4NH3 → [Cu(NH3)4]SO4 (blue complex)
Answer: (b)