Daily Quiz-270

1. Which of the following institutions developed CHACE-2?

A. Space Applications Centre, Ahmedabad

B. Physical Research Laboratory (PRL), Ahmedabad

C. ISRO Satellite Centre, Bengaluru

D. Space Physics Laboratory (SPL), Thiruvananthapuram

2. What advantage does CHACE-2 have over its predecessor CHACE?

A. Higher mass resolution and extended mass range

B. Uses X-ray detection instead of mass spectrometry

C. Equipped with lander interface for surface sampling

D. Uses nuclear radiation sources for analysis

3. Why is Argon-40 of scientific interest on the Moon?

A. It traces volcanic gas eruptions.

B. It indicates the thermal evolution and radiogenic activity of lunar interior.

C. It reveals solar wind dynamics.

D. It represents impact-derived oxygen levels.

4. CHACE-2 data help in modeling space weather influence because:

A. It measures magnetic storms directly.

B. It correlates solar activity with changes in exosphere density.

C. It monitors Earth’s ionospheric reflection.

D. It measures gamma radiation flux.

5. Which of the following discoveries was first-ever confirmed by CHACE-2?

A. Water ice presence in lunar poles

B. CME-triggered exosphere pressure surge

C. Polar magnetic anomalies

D. Helium isotopic fractionation

Answers Quiz- 269 (Nov 4)

1. B

Explanation: CHACE (Chandrayaan-1) and MENCA (Mars Exospheric Neutral Composition Analyser) laid the groundwork for CHACE-2’s design.

2. B

Explanation: CHACE-2 recorded the first evidence of a Coronal Mass Ejection (CME) causing a tenfold rise in lunar exosphere pressure.

3. C

Explanation: The lunar exosphere is an ultra-tenuous layer where particles rarely collide — technically not a true atmosphere.

4. C

Explanation: CHACE-2 measured Argon-40, generated by radioactive decay of Potassium-40 in lunar rocks, revealing exospheric dynamics.

5. C

Explanation: In-situ observations are obtained directly from the spacecraft’s local environment in lunar orbit.