A committee of 5 members is to be formed out of 4 men and 5 women. In how many ways can a committee consisting of 3 men and 2 women be formed?
40
41
42
45
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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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