Q.

Which of the statements are true about the law of chemical combination?

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a

Potassium combines with two isotopes of chlorine Cl  35 and Cl  37 to form two samples of KCl. Their formation follows the law of definite composition.

b

Different proportions of oxygen in the various oxides of sulphur prove the law of multiple proportions.

c

H2O and H2S contain 11.11% hydrogen and 5.88% hydrogen, respectively, whereas SO2 contains 50% sulphur. The above data prove the law of reciprocal proportions.

d

In the decomposition of NH3,2NH3→∆N2+3H2, the ratio of volumes of NH3, N2,  and H2 , is 2:1:3. The above data proves the Gay Lussac law.

answer is B.

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Detailed Solution

Different laws of Chemical Combination
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Which of the statements are true about the law of chemical combination?