Chemistry Past Questions and Answers

If chlorine gas is bubbled into water and then this yellowish-green coloured solution is exposed to bright sunlight for a while

12 g of solid protassium chlorate (KCIO) were added to 40 g of water and heated to dissolve all the solid. As the solution cools, crystals of potassium chlorate at 66 ^oC. The solubility of potassium chlorate at 66 ^oC is therefore

In the electrolysis of dilute sulphuric acid using platinum electrodes, the products obtained at the anode and cathode are:
Anode Cathode

The empirical formula of an oxide of nitrogen containing 30.4 per cent of nitrogen is (N=14.0,O=16.0)

When a piece of charcoal enclosed in a cylinder containing air is ignited