Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?

Why is ethyl mercaptan added to LPG ?

What happens when Boric acid is added to water

Why is it necessary to use acetic acid and not H_2SO_4 for acidification of sodium extract for testing sulphur using lead acetate test?

0.324 g of copper was dissolved in nitric acid and the copper nitrate so produced was burnt till all copper nitrate converted to 0.406 g of copper oxide. Calculate the equivalent weight of copper.

A silver coin weighing 11.34g was dissolved in nitric acid. When sodium chloride was added to the solution all the silver (present at AgNO_(3) ) was precipitated as silver chloride. The weight of the precipitated silver chloride was 14.35g . Calculate the percentage of silver in the coin. : 4.8% , 95.2% , 90% , 80%

2 g of a metal when dissolved in nitric acid converted to its nitrate. The nitrate was then precipitated to 2.66 g of the metal chloride. Find the equivalent weight of the metal.

(X) on treatment with sodium hydroxide followed bythe addition of silver nitrate gives white precipitate at room temperature which is soluble in NH_4OH . (X) can be: