Two closed pipes produce to beats per second when emitting their fundamental nodes.If their lengths are in ratio of 25:26,then fundamental frequency-
270,280
260, 270
260, 250
260, 280
-------------(1)
using
------------------(2)
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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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