NCERT Exemplar: Match the following I — task. Science CBSE, Class 10.

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Column I	Column II
a. Bleaching powder	1. Preparation of glass
b. Baking soda	2. Production of $H_2$ and $Cl_2$
c. Washing soda	3. Decolourisation
d. Sodium chloride	4. Antacid

a - 3, b - 2, c - 4, d - 1
a - 3, b - 4, c - 1, d - 2
a - 2, b - 1, c - 4, d - 3
a - 2, b - 4, c - 1, d - 3

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