Question

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

• A. Helium is much less soluble in blood thannitrogen
• B. Nitrogen is much less soluble in blood thanhelium
• C. Due to high pressure deep under the seanitrogen and oxygen react to give poisonous nitric oxide
• D. Nitrogen is highly soluble in water

Answer 1

Answer: (A)

Helium is much less soluble in blood thannitrogen

Answer 2

At high pressure, He is much less soluble than $N_2$ in blood