Q.

Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because

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a

Nitrogen is much less soluble in blood than helium

b

Helium is much less soluble in blood than nitrogen

c

Nitrogen is highly soluble in water

d

Due to high pressure deep under the sea nitrogen and oxygen react to give poisonous nitric oxide.

answer is B.

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Detailed Solution

When pressure increases then solubility of the gas increases in the blood. He is less soluble in blood.

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