Geo-Scientist Prelims 2022 General Studies Q12: Which one of the following statements about the law of chemical…

Which one of the following statements about the law of chemical combination is not correct?

1. (a) Equal volumes of all gases at the same temperature and pressure contain equal number of molecules.
2. (b) If two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of other element, are not in any proportion.
3. (c) Matter can neither be created nor destroyed.
4. (d) A given compound always contains exactly the same proportion of elements by weight.