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Free Science & Tech MCQs for Rajasthan SI

Practice 20 free Science & Tech multiple choice questions for Rajasthan SI exam. Instant answers with explanations in Hindi and English.

Strengthen your Science & Tech knowledge with focused MCQ practice. Every question is sourced from real Rajasthan exam patterns. Switch between Hindi and English, review explanations, and track your progress.

Rajasthan SI — Science & Tech

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

Which of the following represents a primary application of biotechnology in addressing environmental and agricultural challenges specific to Rajasthan?

Question 2 of 20

What justifies the specific scientific nomenclature of 'Hyper Arid Partial Irrigated Zone' for Zone I-C?

Question 3 of 20

An industrial plant claims to produce 'Green Hydrogen' while utilizing electricity generated from a coal power plant for its electrolysis process. According to standard clean energy policies, is this claim valid?

Question 4 of 20

Match List-I with List-II and select the correct answer using the codes given below: List-I (Domain) A. Health & Biotech B. IT & Digital C. Agriculture & Water D. Space & Defense List-II (Specific Application/Policy) 1. Jal Sanchay Jan Bhagidari 2.0 2. Recombinant DNA in dye remediation 3. AVGC-XR Policy 2024 4. Radar cross-section spoofing Codes:

Question 5 of 20

Which company is responsible for the 'Mission Prarambh'?

Question 6 of 20

Assertion (A): While a cup of boiling water and an entire ocean of boiling water record the exact same temperature, they contain drastically different amounts of heat. Reason (R): Temperature measures total thermal energy in Joules, whereas heat only represents average kinetic energy and is totally independent of the substance's mass.

Question 7 of 20

The agronomic deployment of ladybird beetles specifically to consume aphids operates on the foundational scientific principle of:

Question 8 of 20

Which specific air pollutants are cited as being consistently above safe limits in Bhiwadi?

Question 9 of 20

What is the boundary around a black hole called, beyond which nothing can escape?

Question 10 of 20

Which set of districts strictly falls under the jurisdiction of ERCP Phase II for securing drinking and irrigation water?

Question 11 of 20

Which gas is known as 'Stranger Gas'?

Question 12 of 20

Assertion (A): The oral polio vaccine (OPV) is administered to protect the human central nervous system from paralysis. Reason (R): Poliovirus predominantly spreads via respiratory air droplets, directly invading the lungs before reaching the spinal cord.

Question 13 of 20

Consider the following statements regarding the economic impact of solar installations like the Bhadla Solar Park: Assertion (A): Bhadla is recognized not just for environmental benefits but as an economic masterstroke. Reason (R): It successfully converts non-arable, barren desert wasteland into a highly profitable, multi-billion dollar energy asset. Select the correct answer from the codes given below:

Question 14 of 20

Assertion (A): Dietary fibers remain entirely undigested as they pass through the human gastrointestinal tract. Reason (R): The human digestive system completely lacks the specific enzymes required to metabolically break down complex carbohydrates like cellulose.

Question 15 of 20

Assertion (A): Galvanization successfully prevents the rusting of iron because zinc forms an impenetrable barrier and never reacts with oxygen. Reason (R): Zinc is placed above iron in the electrochemical reactivity series. Select the accurate statement:

Question 16 of 20

Which digital platform is explicitly utilized by the administration for the digital supervision and monitoring of schemes like the POSHAN Abhiyaan?

Question 17 of 20

Identify the correct statement regarding the agro-climatic zones of Rajasthan.

Question 18 of 20

Consider the following pairs regarding Skyroot Aerospace's rockets: 1. Vikram-1: Solid propulsion engine 2. Vikram-2: Cryogenic engine 3. Dhawan-1: Solid propulsion engine Which of the pairs given above is/are correctly matched?

Question 19 of 20

Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): Soap is completely ineffective for washing garments in well water containing high mineral content. Reason (R): Soap undergoes an ion exchange with dissolved calcium and magnesium to form an insoluble precipitate. In the context of the above statements, which one of the following is correct?

Question 20 of 20

The Gaganyaan mission aims to send astronauts to which orbit?

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