Chemistry Past Questions and Answers

Which of the following gases has a characteristic pungent smell, turns red litmus paper blue and forms dense white fumes with hydrogen chloride gas?

Commercial bleaching can be carried out using

Mineral acids are usually added to commercial hydrogen peroxide to

Which of the following compounds will burn with a brick-red colour in a non-luminous Bunsen flame?

The purest from of iron which contains only about 0.1% carbon is