Question

. A solution of a substance ‘X’ is used for whitewashing.

(i) Name the substance ‘X’ and write its formula.

(ii) Write the reaction of the substance ‘X’ named in (i) above with

water.


2. Why is the amount of gas collected in one of the test tubes in Activity

1.7 double of the amount collected in the other? Name this gas.​

Answer 1

Answer: A solution of substance calcium oxide is used for white washing
CaO+H2O. Reaction ca(oH)2+o2