CVK 16-17 − Q & A

Name the compound which is reddish brown when hot and yellow when cold

The mean of 40 observations is 160.Later,it was detected that the value 165 was wrong and copied as 125.Find the correct mean.

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Prove that no number added to 13 times of its reciprocal gives 7.
asked by Sai Madhan (saimadhan) 7 years ago
0

A gas cylinder contains 12 x 1024 molecules of oxygen gas. [2]
If Avogadro’s number is 6 x 1023; Calculate:
(i) The mass of oxygen present in the cylinder.
(ii) The volume of oxygen at S.T.P. present in the cylinder. [O = 16]