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Free Science & Tech MCQs for Patwari

Practice 20 free Science & Tech multiple choice questions for Patwari 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.

Patwari — Science & Tech

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

Assertion (A): When gypsum is heated to 393 K or beyond, it completely loses its ability to hydrate and set into a hard mass. Reason (R): Heating gypsum beyond 393 K forms anhydrous calcium sulfate, scientifically known as dead burnt plaster. Select the correct answer:

Question 2 of 20

Since which year has the Polar Satellite Launch Vehicle (PSLV) been in use?

Question 3 of 20

Air and saltwater are considered 'Mixtures' rather than compounds because:

Question 4 of 20

If the refractive index of a medium increases, what happens to the speed of light in that medium?

Question 5 of 20

The total number of satellites in the GPS constellation is:

Question 6 of 20

Which one of the following is NOT a member of the ITER project?

Question 7 of 20

If the formula for linear magnification is given as $m = -v/u = h_i/h_o$, what specific conclusion can a physicist draw if the calculated mathematical value of 'm' turns out to be a positive number?

Question 8 of 20

Which of the following compounds is chemically characterized by a sour taste and the ability to furnish Hydrogen ions (H+)?

Question 9 of 20

The production of Green Hydrogen is a cornerstone of the Clean Energy 2024 targets. This process relies on utilizing renewable energy to drive which specific electrochemical reaction?

Question 10 of 20

What is the expected timeline for the development of ISRO's Next Generation Launch Vehicle (NGLV)?

Question 11 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 12 of 20

Which space agency is associated with the 'Tianwen' Mars mission?

Question 13 of 20

According to standardized global health classifications, which of the following Body Mass Index (BMI) ranges accurately represents a "Normal" or healthy adult weight?

Question 14 of 20

Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): Soaps are deemed highly eco-friendly compared to heavily branched synthetic detergents. Reason (R): Soaps are derived from carboxylic acids, making them highly biodegradable in natural environments. In the context of the above statements, which one of the following is correct?

Question 15 of 20

What is the primary consequence when traditional eco-friendly soap reacts with the calcium ions present in hard water?

Question 16 of 20

Consider the following statements regarding 'oxidative rancidity': I. It is caused by the metabolic activity of bacteria and yeasts. II. It results in dietary fats and oils developing severe foul odors and spoiling. III. It can be strategically prevented by utilizing additives like Butylated Hydroxytoluene (BHT). Which of the statements given above are correct?

Question 17 of 20

Which specific biofertilizer is biologically adapted to form a symbiotic relationship with leguminous crops like Gram and Moong to fix atmospheric nitrogen?

Question 18 of 20

Modern telecommunications and broadband internet rely heavily on optical fibers for long-distance data transmission. Which foundational optical principle forms the operational backbone of these fibers, allowing minimal signal loss?

Question 19 of 20

The 'Tharparkar' cattle breed is highly adapted to extreme heat and is geographically native to which specific borderland districts?

Question 20 of 20

To prevent the creation of ghost beneficiaries, the Jan Aadhaar database is cryptographically protected and relies on:

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