Q.

What is the composition of gases in the tanks used by the scuba divers?

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11.7% helium 32.1% nitrogen 56.2% oxygen

11.7% helium 56.2% nitrogen 32.1% oxygen

56.2% helium 11.7% nitrogen 32.1% oxygen

56.2% helium 32.1 % nitrogen 11.7% oxygen

answer is B.

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Detailed Solution

Air diluted with helium, i.e. a mixture of 11.7% helium, 56.2% nitrogen and 32.1 % oxygen, is present in the tanks used by scuba divers for respiration.

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