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Model Paper 1 — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryModel Paper 12 Marks
Question
The element H and O combine separately with the third element S to form $H _2 S$ and $SO _2$ respectively, then show that they combine directly with each other to from $H _2 O$.
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Answer

As shown in figure, the masses of H and O which combine with the fixed mass of S , i.e. 32 parts are 2 and 32 i.e. they are in the ratio $2: 32$ or $1: 16$. When H and O combine directly to form $H _2 O$, the ratio of their combining , masses are 2:16 or $1: 8$.
These ratio are related to each other as $\frac{1}{16}: \frac{1}{8}=1: 2$
i.e. they are simple multiple of each other.

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