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Which one of the following is another name of RDX?

(a)

Cyanohydrin

(b)

Selenium

(c)

Cyclohexane

(d)

Cyclonite

Correct Answer

(d)

Explanation

Cyclonite is another name for RDX, a high explosive used in military applications.

Microtheme: Defence —
24 questions asked in Prelims in the past.

  1. [2026] Which of the following statements with regard to drone swarms is/are correct?
    1. They use Terahertz band of frequency to communicate with the command centre.
    2. Individual drones in the swarm can communicate with other drones in the swarm.
    3. GPS Spoofing is a commonly used technique to counter drone swarm attack.

    • (a) 1 only
    • (b) 2 and 3 only
    • (c) 1 and 2 only
    • (d) 1, 2 and 3
    Correct Answer: (B) 2 and 3 only
  2. [2026] Which of the following statements with regard to stealth technology is/are correct?
    1. Stealth objects have a very small radar cross-section and are coated with Radar Absorbing Material.
    2. Stealth objects can be detected using specific frequencies.
    3. Stealth objects are coated with metamaterials to increase the scattering of electromagnetic radiation.

    • (a) 1 only
    • (b) 2 and 3 only
    • (c) 1 and 2 only
    • (d) 1, 2 and 3
    Correct Answer: (C) 1 and 2 only
  3. [2026] The Bureau of Indian Standard (BIS) recently introduced a national standard to test and assess bomb disposal system. Which of the following is/are correct?
    1. The new standard is known as IS 19445 : 2025.
    2. It will improve interoperability of equipment across agencies.
    3. It was developed by TBRL, DRDO in collaboration with the 30th Central Scientific Research Institute, Russia.

    • (a) 1, 2 and 3
    • (b) 2 and 3 only
    • (c) 1 and 2 only
    • (d) 1 only
    Correct Answer: (C) 1 and 2 only
  4. [2026] Which one of the following pairs is NOT correctly matched?
    (Indian Army Corps) : (Headquarters)

    • (a) 3 Corps : Dimapur
    • (b) 4 Corps : Tezpur
    • (c) 14 Corps : Leh
    • (d) 33 Corps : Srinagar
    Correct Answer: (D) 33 Corps : Srinagar
  5. [2026] Which of the following items of defence hardware is/are manufactured in India?
    1. Su-30 MKI Fighter Jets
    2. T-90 MK-III Tanks
    3. Akula Class Submarine

    • (a) 1 and 2
    • (b) 1 and 3
    • (c) 1 only
    • (d) 2 only
    Correct Answer: (A) 1 and 2
  6. [2026] Consider the following statements about Mission Sudarshan Chakra of India:
    1. It aims to enhance India’s air defence, ballistic missile defence and aerial offensive capabilities.
    2. Designed to enhance rapid, precise, and powerful defence responses, reinforcing India’s strategic autonomy.
    3. One of the aims is to cover all public places of India by an expanded nationwide security shield by 2035.

    • (a) 1, 2 and 3
    • (b) 1 and 2 only
    • (c) 2 and 3 only
    • (d) 1 only
    Correct Answer: (A) 1, 2 and 3
  7. [2025] With reference to India’s defence, consider the following pairs:
    Aircraft type : Description
    I. Dornier-228 : Maritime patrol aircraft
    II. IL-76 : Supersonic combat aircraft
    III. C-17 Globemaster III : Military transport aircraft
    How many of the pairs given above are correctly matched?

    • (a) Only one
    • (b) Only two
    • (c) All the three
    • (d) None
    Correct Answer: (B) Only two
  8. [2025] What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which are sometimes talked about in media?

    • (a) These are alternatives to hydro- fluorocarbon refrigerants
    • (b) These are explosives in military weapons
    • (c) These are high-energy fuels for cruise missiles
    • (d) These are propulsion fuels for rocket
    Correct Answer: (B) These are explosives in military weapons
  9. [2025] With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:
    I. All types of UAVs can do vertical landing.
    II. All types of UAVs can do automated hovering.
    III. All types of UAVs can use battery only as a source of power supply.
    Which of the statements given above are correct?

    • (a) Only one
    • (b) Only two
    • (c) All the three
    • (d) None
    Correct Answer: (D) None
  10. [2024] Which of the following is/are correctly matched in terms of equivalent rank in the three services of Indian Defence forces?
    Army : Airforce : Navy
    1. Brigadier : Air Commodore : Commander
    2. Major General : Air Vice Marshal : Vice Admiral
    3. Major : Squadron Leader : Lieutenant Commander
    4. Lieutenant Colonel : Group Captain : Captain
    Select the correct answer using the code given below:

    • (a) 1 and 4
    • (b) 1 and 3
    • (c) 2,3,and 4
    • (d) 3 only*
    Correct Answer: (D) 3 only*
  11. [2024] Consider the following aircraft:
    1. Rafael
    2. MiG-29
    3. Tejas MK-1
    How many of the above are considered fifth generation fighter aircraft?

    • (a) Only one
    • (b) Only two
    • (c) All three
    • (d) None*
    Correct Answer: (D) None*
  12. [2023] Consider the following statements:
    1. Ballistic missiles are jet-propelled at subsonic speeds throughout their fights, while cruise missiles are rocket-powered only in the initial phase of flight.
    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.
    Which of the statements given above is/are correct?

    • (a) 1 only
    • (b) 2 only
    • (c) Both 1 and 2
    • (d) Neither 1 nor 2
    Correct Answer: (D) Neither 1 nor 2
  13. [2018] What is “Terminal High Altitude Area Defense (THAAD)”, sometimes seen in the news ?

    • (a) An Israeli radar system
    • (b) India’s indigenous anti-missile programme
    • (c) (c)An American anti-missile system
    • (d) A defence collaboration between Japan and South Korea
    Correct Answer: (C) (c)An American anti-missile system
  14. [2016] Which one of the following is the best description of ‘INS Astradharini’, that was in the news
    recently?

    • (a) Amphibious warfare ship
    • (b) Nuclear-powered submarine
    • (c) Torpedo launch and recovery vessel
    • (d) Nuclear-powered aircraft carrier
    Correct Answer: (C) Torpedo launch and recovery vessel
  15. [2014] With reference to Agni-IV Missile, which of the following statements is/are correct?
    1. It is surface-to surface missile.
    2. It is fuelled by liquid propellant only.
    3. It can deliver one-tonne nuclear warheads about 7500km away.
    Select the correct answer using the code given below:

    • (a) 1 only
    • (b) 2 and 3 only
    • (c) 1 and 3 only
    • (d) 1, 2 and 3 only
    Correct Answer: (A) 1 only
  16. [2009] Consider the following statements :
    1. INS Sindhughosh is an aircraft carrier.
    2. INS Viraat is a submarine.
    Which of the statements given above is/are correct ?

    • (a) 1 only
    • (b) 2 only
    • (c) Both 1 and 2
    • (d) Neither 1 nor 2
    Correct Answer: (D) Neither 1 nor 2
  17. [2009] In the context of Indian defence, consider the following statements :
    1. The Shourya missile flies with a speed of more than 8 Mach.
    2. The range of Shourya missile is more than 1600 km.
    Which of the statements given above is/are correct ?

    • (a) 1 only
    • (b) 2 only
    • (c) Both 1 and 2
    • (d) Neither 1 nor 2
    Correct Answer: (D) Neither 1 nor 2
  18. [2008] From which one of the following did India buy the Barak anti-missile defence systems?

    • (a) Israel
    • (b) France
    • (c) Russia
    • (d) USA
    Correct Answer: (A) Israel
  19. [2008] What is Agent Orange?

    • (a) An ace spying group trained by the Police in London
    • (b) A weed-killing chemical used by the US Military in the Vietnam War
    • (c) A technique used in the advanced railway safety procedure
    • (d) A special chemical used in making alloy steel
    Correct Answer: (B) A weed-killing chemical used by the US Military in the Vietnam War
  20. [2008] ‘Hand-in-Hand 2007’, a joint anti-terrorism military training was held by the officers of the Indian Army and officers of the Army of which one of the following countries?

    • (a) China
    • (b) Japan
    • (c) Russia
    • (d) USA
    Correct Answer: (A) China
  21. [2008] In the context of the Indian defence, what is ‘Dhruv’?

    • (a) Aircraft-carrying warship
    • (b) Missile-carrying submarine
    • (c) Advanced light helicopter
    • (d) Intercontinental ballistic missile
    Correct Answer: (C) Advanced light helicopter
  22. [2007] Which one of the following is another name of RDX?

    • (a) Cyanohydrin
    • (b) Selenium
    • (c) Cyclohexane
    • (d) Cyclonite
    Correct Answer: (D) Cyclonite
  23. [2007] Which one of the following countries recently upgraded its defense agency to a full defense ministry?

    • (a) Italy
    • (b) Japan
    • (c) Switzerland
    • (d) Germany
    Correct Answer: (B) Japan
  24. [2003] With reference to Indian defence, which one of the following statements is NOT correct?

    • (a) With the induction of Prithvi-II, the IAF is the only air force in the world with surface-to-surface ballistic missiles under its command.
    • (b) Sukhoi-30 MKI jet fighters can launch air-to-air and air-to-surface precision missiles
    • (c) Trishul is a supersonic surface-to-air missile with a range of 30 km
    • (d) The indigenously built INS Prabal can launch surface-to-surface missiles
    Correct Answer: (C) Trishul is a supersonic surface-to-air missile with a range of 30 km