Question

. When Mg is burnt in the atmosphere of an element X white powder is obtained. When this
dissolved in water it gives a gas Y with pungent smell. What are X and Y ?
(1) C, CH
(2) N, NH, (3) P, H,PO, (4) S, H,S
number of electrons in their valence shell.
tota
lly have​

Answer 1

Answer:

Magnesium ribbon burns in air and forms white Magnesium oxide, MgO (X),

2 Mg(s) + O2(g) → 2 MgO(s)

X

The atmospheric nitrogen is generally inert and the burning of magnesium ribbon provides high temperature, which makes nitrogen gas to react with magnesium and form Magnesium Nitride, Mg3N2, (Y)

3 Mg(s) + N2(g) → Mg3N2(s)

Y

Therefore, X is MgO and Y is Mg3N2.

Answer 2

X is magnesium oxide and

Y is both Magnesium hydroxide and hydrogen.