Mass of H 2 O obtained by the reaction of 2 g hydrogen and 1 g oxygen isA- 3 gB- 4-5 gC- 2-5 gD- 1-125 g

The correct option is D 1.125gEquivalents of hydrogen 2 g/1 g/eq= 2 eq Equivalents of oxygen 1 g/8 g/eq= 18 eq ∴ the limiting reagent is oxygen. Since ...

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Standard XII

Chemistry

Preparation of Hydrogen

Mass of H 2 O...

Question

Mass of $H_{2} O$ obtained by the reaction of 2g hydrogen and 1g oxygen is

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1.125g

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4.5g

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2.5g

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Solution

The correct option is B 1.125g
Equivalents of hydrogen - $\frac{2 g}{1 g / e q} = 2 e q$

Equivalents of oxygen - $\frac{1 g}{8 g / e q} = \frac{1}{8} e q$

$∴$ the limiting reagent is oxygen. Since 8 g of oxygen react with 1 g of hydrogen, water formed here is given by:

8 g of O $\equiv$ 1 g of H

$∴,$ 1 g of O $\equiv \frac{1}{8}$ g of H
Total weight of water = 1 + $\frac{1}{8}$ = 1.125 g

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Mass of H2O obtained by the reaction of 2g hydrogen and 1g oxygen is

Mass of $H_{2} O$ obtained by the reaction of 2g hydrogen and 1g oxygen is