Assertion :Helium is used in diving apparatus. Reason: Solubility of helium is less in blood.

Choose the correct options.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
A mixture of $2$ % $O_{2}$ and $98$ % $H e$ is used in diving apparatus which gives the same partial pressure of $O_{2}$ as in normal air at $1$ atm.

Due to high partial pressure and greater solubility, $N_{2}$ gets dissolved in blood and form bubbles (bends or decompression sickness). Hence, $N_{2}$ is replaced by helium which is much less soluble in biological fluids.

Hence, option A is correct.

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Assertion (A) o-nitrophenol is less soluble in water than the m- and p-isomers.
Reason (R) m and p-nitrophenols exist as associated molecules.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion :Helium is used in diving apparatus. Reason: Solubility of helium is less in blood.Choose the correct options.

Assertion :Helium is used in diving apparatus. Reason: Solubility of helium is less in blood.

Choose the correct options.