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State PCS PYQPrelims 2021

UPPCS · Question 23

With reference to radioactivity, which of the following statements is/are correct? 1. Radioactivity is a nuclear property. 2. Hydrogen bomb is prepared on the principle of nuclear fission. Select the correct answer using the codes given below.

  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2
Show answer & explanation

Answer: (A) Only 1

Explanation

Radioactivity arises from unstable nuclei; the hydrogen bomb works on nuclear fusion (triggered by fission).