Statement 1: The complete electrolysis of $45$ grams of water will yield $40$ grams of $H_{2}$ and $5$ grams of $O_{2}$ .
Statement 2: Water is composed of hydrogen and oxygen in a ration of $8 : 1$ by mass.

Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

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Both Statement 1 and Statement 2 are correct but Statement 2 is not the correct explanation of Statement 1.

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Statement 1 is correct but Statement 2 is not correct.

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Statement 1 is not correct but Statement 2 is correct.

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Both the Statement 1 and Statement 2 are not correct.

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Solution

The correct option is D
Both the Statement 1 and Statement 2 are not correct.

Both the Statement 1 and Statement 2 are not correct.
Statement 1: The complete electrolysis of 45grams of water will yield 40 grams of O2 and 5 grams of H2.
The atomic masses of H and O are 1 g/mol and 16 g/mol respectively.
The molar mass of water is 18 g/mol.
45 gram of water will contain $45 \times \frac{16}{18} = 40$ grams of oxygen and $45 - 40 = 5$ g of hydrogen.
Statement 2: Water is composed of hydrogen and oxygen in a ration of 8:1 by mass.
Thus 18 g of water contains 16 g of O and 2 g of H.
Water is composed of hydrogen and oxygen in a ration of 2: 16 = 1:8 by mass.

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Statement 1: The complete electrolysis of 45grams of water will yield 40 grams of H2 and 5 grams of O2.Statement 2: Water is composed of hydrogen and oxygen in a ration of 8:1 by mass.

Statement 1: The complete electrolysis of $45$ grams of water will yield $40$ grams of $H_{2}$ and $5$ grams of $O_{2}$ .
Statement 2: Water is composed of hydrogen and oxygen in a ration of $8 : 1$ by mass.