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Basic Science MCQs for RAS

Practice Basic Science under Science & Tech for RAS with 20 free MCQs in Hindi and English.

RAS — Basic Science

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

Mechanical Advantage (MA) is defined as the ratio of:

Question 2 of 20

Which metal is the most ductile, capable of being drawn into very long wires?

Question 3 of 20

Which lens acts as a converging lens to correct Hypermetropia?

Question 4 of 20

What happens to the kinetic energy of particles when a substance moves from Solid to Gas state?

Question 5 of 20

Boiling is considered a 'Bulk Phenomenon'. What does this mean?

Question 6 of 20

What is the scientific term used to describe the vision defect commonly known as Near-sightedness?

Question 7 of 20

Which of the following compounds forms insoluble scum, identified chemically as Calcium Stearate, when exposed to hard water?

Question 8 of 20

Which Indian ancient elements (Panchtatva) correspond to 'Air' and 'Sky' respectively?

Question 9 of 20

Consider the following statements regarding synthetic food additives: I. Salts of sorbic acid are utilized to intercept oxygen free radicals. II. Sucralose is an artificial sweetener utilized for stringent calorie control. III. BHT aggressively oxidizes dietary fats to preserve their texture. Which of the statements given above is/are definitively incorrect?

Question 10 of 20

Consider the following assertions about 'Matter': Assertion (A): Everything in the universe, living or non-living, is made of matter. Reason (R): Matter is defined as anything that has mass and occupies space. Select the correct option:

Question 11 of 20

Assertion (A): Achieving high marks in descriptive science exams requires writing long, narrative paragraphs focusing heavily on the historical context of scientific discoveries. Reason (R): Evaluators expect precise scientific terminology, bullet points, and neat diagrams to demonstrate subject mastery.

Question 12 of 20

What is the primary factor responsible for the increase in atomic radius as one moves down a group in the periodic table?

Question 13 of 20

In how many phases was the Bhadla Solar Park developed?

Question 14 of 20

Which alloy is primarily used for making cartridges and statues?

Question 15 of 20

Identify the incorrect match regarding the class of levers and their examples: List-I (Class) | List-II (Example)

Question 16 of 20

Assertion (A): Organic chemistry forms the fundamental basis for understanding all terrestrial life forms. Reason (R): Organic chemistry is the dedicated study of carbon-containing compounds, which are the essential building blocks of biomolecules and living organisms.

Question 17 of 20

A neutral Bromine atom possesses an atomic number of 35 and a mass number of 80. Calculate the exact quantities of protons, electrons, and neutrons present within this specific atom.

Question 18 of 20

Which mathematical ratio correctly defines the absolute refractive index ($mu$) of a given transparent medium?

Question 19 of 20

Identify the incorrect statement regarding Plaster of Paris (POP) and Gypsum:

Question 20 of 20

In the human nervous system, the microscopic gap between the axon terminal of one neuron and the dendrite of the next neuron is scientifically termed as:

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