Home PYQs UPPSC UPPSC MCQs Prelims 2022 (GS Paper I)

Question

Which of the following pairs is NOT correctly matched ?
Quantity – S. I. Unit

  1. Activity of radio active substance – Curie
  2. Power of lense – Diopter
  3. Heat – Joule
  4. Pressure – Pascal

Answer:

Option A: Activity of radio active substance – Curie

Detailed Solution:

The correct answer is “Activity of radio active substance – Curie”.

The SI unit of radioactivity is becquerel (बेकरेल) (Bq) and this term is named after Henri Becquerel. Unit of radioactivity is defined as: The activity of a quantity of radioactive material where one decay takes place per second.