Question

Which of the following statements is /are incorrect?

• A. In thiourea test for nitrite a green coloured solution is obtained
• B. It is not necessary to carry out the chromyl chloride test in a dry test tube
• C. In $PbN{O}_3$ the brown ring test can be performed with its water extract
• D. Suspension of $CdC{O}_3$ gives black precipitate with sodium sulpide solution

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A In thiourea test for nitrite a green coloured solution is obtained
B It is not necessary to carry out the chromyl chloride test in a dry test tube
C In $PbN{O}_3$ the brown ring test can be performed with its water extract
D Suspension of $CdC{O}_3$ gives black precipitate with sodium sulpide solution