Question

Match List-I with List-II, match the gas evolved during each reaction.

List-I		List-II
A	$\left( NH _4\right)_2 Cr _2 O _7 \xrightarrow{\Delta}$	1	$H _2$
B	$KMnO _4+ HCl \rightarrow$	2	$N _2$
C	$Al + NaOH + H _2 O \rightarrow$	3	$O _2$
D	$NaNO _3 \xrightarrow{\Delta}$	4	$Cl _2$

Choose the correct answer from the options given below :

• A. (A) - (II), (B) - (III), (C) - (I), (D) - (IV)
• B. (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
• C. (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
• D. (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Answer 1

Answer: (C)

$\left( NH _4\right)_2 Cr _2 O _7 \xrightarrow{\Delta} N _2+ Cr _2 O _3+4 H _2 O$
$KMnO _4+ HCl \rightarrow MnCl _2+ KCl + Cl _2+ H _2 O$
$Al + NaOH + H _2 O \rightarrow H _2+ Na \left[ Al ( OH )_4\right]$
$NaNO _3 \longrightarrow NaNO _2+ O _2$