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JEE Main · Principles Related to Practical Chemistry · Quiz

Principles Related to Practical Chemistry — quick quiz

5 real JEE Main questions on Principles Related to Practical Chemistry. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

HARD

In the qualitative analysis of a mixture of cations, group II cations (Pb2+, Cu2+, Cd2+) are precipitated by passing H2S gas in the presence of dilute HCl. The primary reason for adding dilute HCl before passing H2S is: