Mention two uses of bleaching powder.

How will you prove that a given salt is a carbonate of a metal?

For each of the compound A and B, suggest a suitable method its preparation along with the balanced chemical equations.

i. A is bleaching powder

ii. B is gypsum

A compound ‘X’ is bitter to taste. It is compound of washing powder and reacts with dilute HCl to produce brisk effervescence due to a colourless and odourless gas ‘Y’ which turns lime water milky due to the formation of ‘Z’ when an excess of CO₂ is passed, milkiness disappears due to the formation of ‘P’. Identify ‘X’. ‘Y’, ‘Z’ and ‘P’. Write the equations involved in the formation of Y, Z, and P.

For making the cake, baking powder is taken. If at home your mother uses baking soda instead of baking powder in the cake.

(a) How will it affect the taste of the cake and why?

(b) How can baking soda be converted into baking powder?

(c) What is the role of tartaric acid added to the baking soda?