Daily Quiz- 269

1. Which of the following payloads were predecessors to CHACE-2?

1. CHACE onboard Chandrayaan-1

2. MENCA onboard Mars Orbiter Mission

3. MIP on Chandrayaan-1

Select the correct answer:

A. 1 only

B. 1 and 2 only

C. 2 and 3 only

D. 1, 2 and 3

2. Which phenomenon did CHACE-2 observe on May 10, 2024 that confirmed long-predicted theories?

A. A total lunar eclipse reflection event

B. A CME-induced rise in lunar exosphere pressure

C. Polar ice sublimation burst

D. Micrometeorite swarm

3. The term “lunar exosphere” refers to:

A. Subsurface magma layer

B. The Moon’s uppermost solid crust

C. An extremely thin, collisionless atmosphere of neutral particles

D. The region of solar wind plasma trapped around the Moon

4. Which noble gas was detected and mapped by CHACE-2 to study isotopic variations?

A. Helium-3

B. Neon-20

C. Argon-40

D. Xenon-132

5. CHACE-2 provides in-situ data. In this context, in-situ means:

A. Remote observation from Earth

B. Simulation inside ground laboratories

C. Direct measurement at the location (on lunar orbit)

D. Data derived from computer modelling

Answers Quiz- 268 (Nov 3)

1. B

Explanation: CHACE-2 is part of the Chandrayaan-2 orbiter, launched in July 2019 to study the Moon’s exosphere composition.

2. B

Explanation: CHACE = Chandra’s Atmospheric Composition Explorer, the “2” denotes its upgraded version on Chandrayaan-2.

3. B

Explanation: CHACE-2 is a neutral gas mass spectrometer, measuring atomic and molecular species in the Moon’s thin exosphere.

4. C

Explanation: The instrument measures chemical composition, density, and temporal variation of the Moon’s exosphere (a near-vacuum layer).

5. C

Explanation: It analyses gases in the 1–300 atomic mass units (amu) range to cover both light and heavy elements.