Sea divers use a mixture of

Sea divers use a mixture of
  1. $O_2,\ N_2$
  2. $O_2,\ H_2$
  3. $O_2,\ He$
  4. $N_2,\ H_2$

Solution

In place of nitrogen, helium is mixed with oxygen because helium is not soluble in blood even under high pressure.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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