1.

Assertion: AgNO_(3) reacts with KCNN to form white ppt. of AgCN. This white ppt. disappears when excess kCN is added. Reason: AgCN decomposes to form silver-carbide and evolve N_(2) gas.

Answer»

If assertion is TRUE but the REASON is FALSE
If assertion is false but reason is true
If both assertion and reason are true and reason is the correct EXPLANATION of assertion
If OTH assertion and reason are true but reason is not the correct explanation of assertion

Answer :A


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