Chemistry Past Questions and Answers

Water is poured over a white solid and a colourless neutral gas is evolved which burns with a sooty flame. The white solid is?

Cotton is almost pure?

Which of the following types of reactions takes place between C<sub style='font-size: smaller;'>2</sub>H<sub style='font-size: smaller;'>4</sub> and the halogens?

The product formed at the the cathode during the electrolysis of sodium chloride solution with carbon electrodes is?

Sodium carbonate crystals on exposure to a dry atmosphere change to a white powder. This phenomenon is known as?