03.04.2025 UPSC PRELIMS MCQs

Q1. Consider the following statements:

1. While greenhouse gases generally have a warming effect on the Earth's climate by trapping outgoing longwave radiation, aerosols can have both warming and cooling effects depending on their composition and altitude.
2. Black carbon aerosols primarily contribute to cooling the atmosphere by reflecting incoming solar radiation, whereas sulfate aerosols predominantly cause warming by absorbing radiation.

Which of the statements given above is/are correct?

Q2. With reference to India's lunar exploration program, what does the acronym "CHASTE" represent in the context of Chandrayaan-3 mission?

Q3. Consider the following statements regarding gut health and the microbiome:

1. The gut microbiota primarily consists of bacteria, while fungi, viruses, and protozoa play negligible roles in maintaining gut homeostasis and immune function.

2. Short-chain fatty acids (SCFAs) produced by gut bacteria through fermentation of dietary fiber can cross the blood-brain barrier and influence neurological functions, demonstrating the gut-brain axis connection.

Which of the statements given above is/are correct?

Q1. Consider the following statements about the Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation (BIMSTEC):

1. The BIMSTEC Secretariat is permanently located in Dhaka, Bangladesh, and became operational in 2014.

2. When the organization was first established in 1997, it was called BIST-EC (Bangladesh, India, Sri Lanka, Thailand Economic Cooperation) with these four countries as the founding members.

3. The BIMSTEC Free Trade Area Framework Agreement was signed in 2004 and the comprehensive Free Trade Agreement has been fully implemented across all member states.

Which of the statements given above is/are correct?

Q5. Consider the following statements:

1. The Sagaing Fault is a right-lateral strike-slip fault marking the boundary between the Indian and Eurasian Plates.
2. The northward motion of the Indian Plate is distributed between the Sagaing Fault and the Arakan Megathrust along western Myanmar.
3. Myanmar sits on the Burma Microplate, caught between the Indian and Eurasian Plates.
4. The Indo-Burma Range represents a subduction zone where the Indian Plate dips beneath the Eurasian Plate.

Which of the statements given above are correct?