MCQ
Which of the following substance cannot be broken down by a chemical method?
  • A
    Ammonia $\left(\mathrm{NH}_3\right)$
  • Helium $(\mathrm{He})$
  • C
    Methane $\left(\mathrm{CH}_4\right)$
  • D
    Water $\left(\mathrm{H}_2 \mathrm{O}\right)$

Answer

Correct option: B.
Helium $(\mathrm{He})$
Helium $(\mathrm{He})$

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