JEE Advanced 2013Paper 1

Exam: JEE Advanced
Year: 2013
Paper: Paper 1
Subject: Chemistry
Chapter: p Block Elements (Group 15, 16, 17 & 18)

JEE Advanced 2013 · Paper 1 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Concentrated nitric acid, upon long standing, turns yellow-brown...

Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of

Options

ANO
BNO₂
CN₂O
DN₂O₄

Correct answer

B. NO₂

Step-by-step solution

Nitric acid decomposes in sunlight as per reaction
$4 {\text{HNO}}_{3} ⟶ 4 {\text{NO}}_{2} + 2 {\text{H}}_{2} \text{O} + {\text{O}}_{2} \left(\text{g}\right)$
Yellow colour is due to dissolved NO₂(liq.)

NO₂(g) is brown in colour but it is yellow in dissolved form.

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