The system shown is released at rest. Speed of block A (in m/s), after B has descended by 2 cm is
0.4
0.5
0.6
0.8
Solution :
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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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