Examine the following statements about the SSLV-D2 mission and select the…

2025

Examine the following statements about the SSLV-D2 mission and select the correct option:

Statement 1: SSLV-D2 inserted EOS-07, Janus-1, and AzaadiSAT-2 into a 450 km circular orbit utilizing a three-stage vehicle powered entirely by liquid propulsion.

Statement 2: The SSLV-D2 mission showcased rapid deployment capability with low turnaround time and limited ground infrastructure needs.

Answer: B. Only Statement 2 is correctConcept: A statement that bundles several claims together is true only when every claim inside it is true; a single false clause makes the entire statement…

  1. A.

    Only Statement 1 is correct

  2. B.

    Only Statement 2 is correct

  3. C.

    1 and 2 are correct

  4. D.

    Neither 1 nor 2 are correct

Attempted by 3 students.

Show answer & explanation

Correct answer: B

Concept: A statement that bundles several claims together is true only when every claim inside it is true; a single false clause makes the entire statement false. For a launch-vehicle statement, two independent things have to be checked: the mission outcome, meaning the orbit the payloads actually reached, and the vehicle architecture, meaning how many stages it has and what propellant each stage burns.

Application: Test each statement clause by clause against the published flight record.

  • Statement 1 bundles an outcome claim with an architecture claim. The outcome claim is accurate: on 10 February 2023 SSLV-D2 injected EOS-07, Janus-1 and AzaadiSAT-2 into the intended 450 km circular orbit, and ISRO records that flight as successful. The architecture claim is not accurate: SSLV is built from three solid-propellant stages (SS1, SS2 and SS3) topped by a small liquid-propellant Velocity Trimming Module (VTM) that only trims the final velocity for precise injection. Since one clause is false, the whole of Statement 1 is false.

  • Statement 2 restates SSLV's published design brief: low cost, low turnaround time, launch-on-demand flexibility, minimal launch infrastructure and the ability to carry several small satellites on one flight. It is accurate as written.

Statement

Claim examined

Finding

Statement 1

450 km circular orbit for EOS-07, Janus-1 and AzaadiSAT-2

Matches ISRO's SSLV-D2 flight record

Statement 1

Three stages powered entirely by liquid propulsion

Does not hold: three solid stages plus a liquid Velocity Trimming Module

Statement 2

Low turnaround time, limited ground infrastructure

Matches SSLV's stated design goals

Cross-check: The usual trap is to confuse this flight with SSLV-D1 (7 August 2022), the first developmental flight, whose terminal phase left its payloads in an unstable elliptical orbit. That orbital failure belongs to D1; D2 was the corrected flight and did reach the intended circular orbit. Statement 1 therefore breaks down on its propulsion clause, not on its orbit clause, and rejecting a statement for the wrong reason lands on the right answer only by luck.

Statement 1 is false and Statement 2 is true, so only Statement 2 is correct.

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