Column I | Column II |
(i) Hydrogen peroxide is used as a | (a) Zeolite |
(ii) Used in calgon method | (b) Perhydrol |
(iii) Permanent hardness of hard water is removed by | (c) Sodium hexametaphosphate |
(d) Propellant |
Answer:
(i-b, d) (ii-c) (iii-a, c)
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