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Class 11ChemistryHydrogenHydrogen
Easy

Asthma patients use a mixture of ........... for breathing.

  • A
    $O_2$ and $N_2O$
  • B
    $O_2$ and $He$
  • C
    $O_2$ and $NH_3$
  • D
    $O_2$ and $CO$
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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Hydrogen

Subtopic

Hydrogen

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