हिंदी

Which of the following are radioactive? i. Argon ii. Polonium iii. Astatine iv. Tellurium

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प्रश्न

Which of the following are radioactive?

i. Argon

ii. Polonium

iii. Astatine

iv. Tellurium

विकल्प

  • i, iv

  • ii, iii

  • ii, iv

  • iii, iv

MCQ
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उत्तर

ii, iii

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Occurrence of Elements of Groups 16, 17 and 18
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