A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone?

When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are?

By means of filtration, one component can be obtained pure from an aqueous mixture of sodium chloride and?

The property used in the industrial preparation of nitrogen and oxygen from air is?

A mixture of sugar and sulphur can be separated by?