Ans: C

Exp: 

Statement 1 is correct: GSAT-3, known as EDUSAT, is meant for distance classroom education from the school level to higher education. This was the first dedicated “Educational Satellite” that provided the country with satellite-based two-way communication to classrooms for delivering educational materials.

Statement 2 is correct: This is a Geo-synchronous satellite developed on I-2K bus. GSAT-3 was co-located with METSAT(KALPANA-1) and INSAT-3C at 74o E longitude. It was decommissioned in 2010.

Ans: A

Exp:

Statement 1 is correct: The James Webb Space Telescope is the world’s premier space science observatory. Webb will solve mysteries in our solar system, look beyond to distant worlds around other stars, and probe the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).

Statement 2 is incorrect: It was launched aboard a rocket on December 25, 2021, and is currently at a point in space known as the Sun-Earth L2 Lagrange point, approximately 1.5 million km beyond Earth’s orbit around the Sun. Lagrange Point 2 is one of the five points in the orbital plane of the Earth-Sun system. L2 is a position directly behind Earth in the line joining the Sun and the Earth. It would be shielded from the Sun by the Earth as it goes around the Sun, in sync with the Earth.

Ans: A

Exp:

The Prawn Nebula, also known as IC 4628 and Gum 56, is an emission nebula located in the constellation Scorpius. It has an apparent magnitude of 7.31 and lies at a distance of 6,000 light years from Earth. Located to the south of Antares, the nebula is about 250 light years in diameter, corresponding to an apparent size of 1.5 degrees, or 3-4 times the size of the full Moon.

Stretching over 250 light-years wide, IC 4628 is believed to be a massive stellar nursery, where new stars are forming. Scientists classify it as an emission nebula because its gas has been energized, or ionized, by the radiation of nearby stars. That process produces electrons that re-emit the absorbed energy in the form of infrared light.

Ans: A

Exp:

Statement 1 is incorrect: LVM3 is configured as a three stage vehicle with two solid strap-on motors (S200), one liquid core stage (L110) and a high thrust cryogenic upper stage (C25). The S200 solid motor is among the largest solid boosters in the world with 204 tonnes of solid propellant.

Statement 2 is correct: Launch Vehicle Mark-3 is the launch vehicle of Chandrayaan-3. It was previously known as Geosynchronous Satellite Launch Vehicle (GSLV) Mk-3. Launch Vehicle Mark-III (LVM-3) is a composite of propulsion, lander and rover.

Statement 3 is incorrect: LVM3 is the new heavy lift launch vehicle of ISRO for achieving a 4000 kg spacecraft launching capability to GTO (Geosynchronous Transfer Orbit) in a cost effective manner. Its powerful engine, the cryogenic stage, lets LVM-3 to push heavy payloads in the Low Earth Orbits of 600 km altitude.

Ans: D

Exp:

LUX-ZEPLIN (LZ) is a next-generation dark matter experiment selected by the US Department of Energy (DOE) as one of the three ‘G2’ (for Generation 2) dark matter experiments. Located at the 4850′ level of the Sanford Underground Research Facility in Lead, SD, the experiment utilizes a two-phase time projection chamber (TPC), containing seven active tonnes of liquid xenon, to search for dark matter particles. The LZ collaboration consists of about 250 scientists in 35 institutions in the U.S., U.K., Portugal, and Korea. The name LZ stems from the merger of two previous dark matter detection experiments: LUX (Large Underground Xenon) and ZEPLIN (ZonEd Proportional scintillation in LIquid Noble gases).