Mention the general methods of preparation of `CO_(2)`along with the chemical reactions.

The laboratory method of preparation of CO is

Write the method of extraction of iron and the chemical reactions involved in it .

General Method Of Preparation - Alkyne|Summary

(a) For each of the compound A and B , suggest a suitable method of its preparation with the balanced chemical equations. (i) A is bleaching powder. (ii) B is gypsum (b) Mention two uses of bleaching powder.

Mention any two methods of preparation of acids. Illustrate with equations.