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two statements are given- one labeled Assertion (A) and the other labeled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below: a) Both A and R are true, and R is correct explanation of the assertion. b) Both A and R are true, but R is not the correct explanation of the assertion. c) A is true, but R is false. d) A is false, but R is true. 14 Assertion: After white washing the walls, a shiny white finish on walls is obtained after two to three days. Reason: Calcium Oxide reacts with Carbon dioxide to form Calcium Hydrogen Carbonate which gives shiny white finish

Posted by Shefali Kumari 5 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Gaurav Seth 5 years, 2 months ago

Ignore previous answer.. this is correct

c) A is true, but R is false.

A solution of slaked lime (Ca(OH)2) is used to white wash the walls. Calcium hydroxide reacts with the carbon dioxide in air to form thin layer of calcium carbonate on the walls. It gives a shiny finish to the walls.

Gaurav Seth 5 years, 2 months ago

b) Both A and R are true, but R is not the correct explanation of the assertion.
A solution of slaked lime (Ca(OH)2) is used to white wash the walls. Calcium hydroxide reacts with the carbon dioxide in air to form thin layer of calcium carbonate on the walls. It gives a shiny finish to the walls.

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