In how many ways can seven balls of different colours be distributed among four children?
16374
16384
16394
16349
Given that,
By the rule of product, this can be done in
Study 40% syllabus and score up to 100% marks in JEE
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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