A could be :
ZnO
NaH
1 and 2
As we have learnt,
Preparation of Hydrogen: There are a number of methods for preparing dihydrogen from metals and metal hydrides.
Correct option is 3
50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pKb of ammonia solution is 4.75, the pH of the mixture will be : Option: 1 3.75 Option: 2 4.75
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