MCQ
निम्नांकित में कौन निष्क्रिय गैस है?
  • A
    $\mathrm{H}_{2}$
  • $\mathrm{He}$
  • C
    $\mathrm{O}_{2}$
  • D
    $\mathrm{CO}_{2}$

Answer

Correct option: B.
$\mathrm{He}$
b

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