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MCQ practice · SSC Chemistry Board questions · Chapter 3: Structure of Matter

Sylhet Board 2021

Which isotope is used to detect the presence of a tumour in the human body?

Think it through first, then pick an option.

  1. a ¹³¹I
  2. b ⁹⁹Tc
  3. c ⁶⁰Co
  4. d ³²P
Answer and explanation

Correct answer: c ⁶⁰Co

The book: ⁶⁰Co detects and treats tumours.

Why the other options are wrong

  • a ¹³¹I: ¹³¹I treats thyroid cancer; tumours are detected with ⁶⁰Co.
  • b ⁹⁹Tc: ⁹⁹Tc images diseased sites, but the book names ⁶⁰Co for tumours.
  • d ³²P: ³²P is used for leukaemia; tumours are detected with ⁶⁰Co.