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 .In the light of the above statements, choose the correct answer:
- ABoth A and R are true and R is correct explanation of A
- BBoth A and R are true and R is not the correct explanation of A
- CA is true but R is false
- DA is false but R is true
Solution & Step-by-step Explanation
1. Assertion A is true: Divers use a mixture of Helium and Oxygen to avoid "the bends" (decompression sickness).2. Reason R is false: Helium is used precisely because it has very low solubility in human blood, unlike Nitrogen. Solubility of Helium in Oxygen is not the relevant factor; its low solubility in biological fluids compared to Nitrogen is what prevents bubble formation during ascent.