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AIPMT 2011 Physics and Chemistry Solved Paper

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Question : 28

Total: 100

The Lassaigne's extract is boiled with conc. HNO3 while testing for halogens. By doing so it ;

decomposes Na2S and NaCN, if formed.
helps in the precipitation of AgCl.
increases the solubility product of AgCl.
increases the concentration of NO3 - ions.

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