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AIIMS 201926 May

Exam: AIIMS
Year: 2019
Date: 26 May
Subject: Chemistry
Chapter: Practical Chemistry

AIIMS 2019 · 26 May · Chemistry · Practical Chemistry

Which of the following salts is coloured salt before heating?

Which of the following salts is coloured salt before heating?

Options

A $\mathrm{CuCO}_3$
B $\mathrm{PbCO}_3$
C $\mathrm{ZnCO}_3$
D $\mathrm{Na}_2 \mathrm{CO}_3$

Correct answer

A. $\mathrm{CuCO}_3$

Step-by-step solution

\mathrm{CuCO}_3

is green before heating while,

\mathrm{PbCO}_3, \mathrm{SrCO}_3

and

\mathrm{Na}_2 \mathrm{CO}_3

are white.

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