What happens when magnesium is burnt in air and the products X and Y are treated with water ? X Y P Q (a) MgO Mg(OH)2 Mg(OH)2 N2 (b) MgO Mg3N2 Mg(OH)2 NH3 (c) MgO Mg3N2 Mg(OH)2 N2 (d) MgO MgCO3 Mg(OH)2 CO2

Question

What happens when magnesium is burnt in air and the products X and Y are treated with water ? <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/b80453907bbb0132a2d6943d9170756f-.jpeg" /> X Y P Q (a) MgO Mg(OH)2 Mg(OH)2 N2 (b) MgO Mg3N2 Mg(OH)2 NH3 (c) MgO Mg3N2 Mg(OH)2 N2 (d) MgO MgCO3 Mg(OH)2 CO2 (A) a (B) b (C) c (D) d

Tardigrade Admin · Accepted Answer

Magnesium reacts with air to form oxide and nitride. On reaction with water the oxide gives hydroxide and nitride gives hydroxide and ammonia.

2 M g + O_{2} \to (X) 2 M g O

3 M g + N_{2} \to (Y) M g_{3} N_{2}

M g O + H_{2} O \to (P) M g (O H)_{2}

M g O + H_{2} O \to (P) 3 M g (O H)_{2} + (Q) 2 N H_{3}

	$X$	$Y$	$P$	$Q$
(a)	$M g O$	$M g (O H)_{2}$	$M g (O H)_{2}$	$N_{2}$
(b)	$M g O$	$M g_{3} N_{2}$	$M g (O H)_{2}$	$N H_{3}$
(c)	$M g O$	$M g_{3} N_{2}$	$M g (O H)_{2}$	$N_{2}$
(d)	$M g O$	$M g C O_{3}$	$M g (O H)_{2}$	$C O_{2}$

Q. What happens when magnesium is burnt in air and the products X and Y are treated with water ? X Y P Q (a) MgO Mg(OH)2​ Mg(OH)2​ N2​ (b) MgO Mg3​N2​ Mg(OH)2​ NH3​ (c) MgO Mg3​N2​ Mg(OH)2​ N2​ (d) MgO MgCO3​ Mg(OH)2​ CO2​

a

b

c

d

Magnesium reacts with air to form oxide and nitride. On reaction with water the oxide gives hydroxide and nitride gives hydroxide and ammonia. 2Mg+O2​→(X)2MgO​ 3Mg+N2​→(Y)Mg3​N2​​ MgO+H2​O→(P)Mg(OH)2​​ MgO+H2​O→(P)3Mg(OH)2​​+(Q)2NH3​​