AIIMS 2011
- Exam
- AIIMS
- Year
- 2011
- Subject
- Chemistry
- Chapter
- p Block Elements (Group 15, 16, 17 & 18)
AIIMS 2011 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Assertion : Helium is used in diving apparatus. Reason : Solubility...
Assertion : Helium is used in diving apparatus.
Reason : Solubility of helium is less in blood.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and reason is the correct explanation of assertion.
Step-by-step solution
A mixture of and He is used in diving apparatus which gives the same partial pressure of as in normal air at . Due to high partial pressure and greater solubility, gets dissolved in blood and form bubbles (bends or decompression sickness). Hence, is replaced by helium which is much less soluble in biological fluids.