The greatest positive integer which divides n (n +1)(n + 2)(n + 3) for all n ∈ N, is
2
6
24
120
Since product of r consecutive integer is divisible by r!
Hence (C) is the correct answer.
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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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