Question 1
Science and Technology | Rare Earth Elements | Medium | The Hindu
SOURCE
Which among the following rare earth element is not highly mined due to unstable compounds?
A. Praseodymium
B. Promethium
C. Terbium
D. Holmium
Solution & Detailed Explanation
Answer: (B) Promethium
Detailed Explanation
- Promethium (specifically the isotope promethium-147) is used for several commercial and industrial purposes, although its high radioactivity and scarcity mean its applications are niche. It is primarily utilized as a beta radiation source for specialized tasks.

Question 2
Environment | Global Warming | Medium | The Hindu
SOURCE
Assertion (A): Urban heat islands can have worse air and water quality than their rural neighbours.
Reason ( R): Urban heat islands stresses the native aquatic species.
Choose the correct answer:
A. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
B. (A) is false, but (R) is true
C. (A) is true, but (R) is false
D. Both (A) and (R) are true and (R) is the correct explanation of (A)
Solution & Detailed Explanation
Answer: (D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Detailed Explanation

Question 3
Polity | Emergency | Medium | The Hindu
SOURCE
Consider the following:
1. President’s rule in a state can be applied only if the Governor of the state submits such report.
2. The powers of executive, legislature and judiciary in a state is vested with the parliament during the President’s rule in a state.
Which of the statements above is or are correct?
A. 1 only
B. 2 only
C. Both 1 and 2
D. None of the above
Solution & Detailed Explanation
Answer: (D) None of the above
Detailed Explanation

Question 4
International Relations | Treaties | Medium | The Hindu
SOURCE
Consider the following:
1. The Human Rights watch was established in 1978.
2. The Human Rights watch initially investigated rights abuses in countries which were signatories to the Helsinki Accords.
Which of the statements above is or are correct?
A. 1 only
B. 2 only
C. Both 1 and 2
D. None of the above
Solution & Detailed Explanation
Answer: (C) Both 1 and 2
Detailed Explanation


