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2 questions · 2012 · answers as per the UPSC key

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UPSC 2012 · Q13 · Science & Technology › Energy & Environment · Save

What is the role of ultraviolet (UV) radiation in the water purification systems?

  1. It inactivates/kills the harmful microorganisms in water.
  2. It removes all the undesirable odours from the water.
  3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.

Which of the statements given above is/are correct?

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Show answer
Answer: (a) 1 only
UPSC 2012 · Q61 · Science & Technology › Energy & Environment · Save

To meet its rapidly growing energy demand, some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium?

  1. Thorium is far more abundant in nature than uranium.
  2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
  3. Thorium produces less harmful waste compared to uranium.

Which of the statements given above is/are correct?

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Show answer
Answer: (d) 1, 2 and 3