(C) Deep sea divers use a mixture of $He$ and $O_2$ for respiration because $He$ is much less soluble in blood than $N_2$.This prevents the formation

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(C) Deep sea divers use a mixture of $He$ and $O_2$ for respiration because $He$ is much less soluble in blood than $N_2$.This prevents the formation of bubbles of $N_2$ in the blood when the diver ascends to the surface,a condition known as decompression sickness or 'bends'.Therefore,the Assertion is correct,but the Reason is incorrect because $He$ is actually sparingly soluble in blood.

Class 12 Chemistry Solutions Solubility

Medium

Assertion: $A$ mixture of $He$ and $O_2$ is used for respiration for deep sea divers.
Reason: $He$ is soluble in blood.

AIIMS 1998 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

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AIIMS 1998 Paper All AIIMS years →

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Medium

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Easy

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Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Helium is used to dilute oxygen in diving apparatus.
Reason $R$: Helium has high solubility in $O_2$.
In the light of the above statements,choose the correct answer from the options given below:

DifficultNEET 2023

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Assertion: $A$ mixture of $He$ and $O_2$ is used for respiration for deep sea divers.Reason: $He$ is soluble in blood.

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The Henry's law constant for the solubility of $N_2$ gas in water at $25 \, ^oC$ is $1 \times 10^5 \, atm$. The mole fraction of $N_2$ in air is $0.8$. Calculate the number of moles of $N_2$ from air that will dissolve in $10 \, moles$ of $H_2O$ at $25 \, ^oC$ and at a total pressure of $5 \, atm$.

If the solubility of $NaCl$ at $20\,^{\circ}C$ is $35\,g$ per $100\,g$ of water,then on adding $50\,g$ of $NaCl$ to the same amount of water at the same temperature,the amount of salt that remains undissolved is .......... $g$.

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Assertion: $A$ mixture of $He$ and $O_2$ is used for respiration for deep sea divers.
Reason: $He$ is soluble in blood.