The ratio of non-metal atoms to the number of atoms of two non-metallic oxides A and B are 0.33 and 0.25 respectively. Find the valencies of non-metals present in the those non-metallic oxides.

4 and 6

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6 and 4

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2 and 3

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3 and 2

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Solution

The correct option is A 4 and 6
The law of definite proportions and constant composition states that all samples of a given chemical compound have the same elemental composition by mass e.g. oxygen makes up up about 8/9th of mass of any sample of pure water while hydrogen makes up the remaining 1/9th of mass.

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$\begin{matrix} METALS & NON-METALS (i) . . . . . . . . . . . . & P o o r c o n d u c t o r s o f h e a t . (i i) M a l l e a b l e & . . . . . . . . . . . . (i i i) F o r m p o s i t i v e i o n s & . . . . . . . . . . . . . . . . . . . . . . . & F o r m a c i d i c o x i d e s . \end{matrix}$

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