Question

Which of the following salts is coloured salt before heating?

• A. $CuCO_3$
• B. $PbCO_3$
• C. $ZnCO_3$
• D. $Na_2CO_3$

Answer 1

Answer: (A)

$CuCO_3$

Answer 2

Answer (a) $CuCO_3$