Chapter 1

NCERT
Class 10
Science
Solutions
1. A solution of a substance ‘X’ is used for white washing.

Question:

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

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

(b) Write the reaction of the substance ‘X’ named in (a) above with water.

Answer:

a) The substance whose solution in water is used for whitewashing is calcium oxide (or quicklime). Its formula is CaO.

b)

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