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Prelims

UPSC Prelims Questions

Practice UPSC Prelims MCQs by subject and year. Free questions with explanations for focused revision.

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Q.4717·Miscellaneous·2021·Easy

Having got excited she opened up the Pandora's Box which led to lot of commotion

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Q.4718·Miscellaneous·2021·Easy

An antibiotic is not useful against a virus whereas a vaccine is. Which one of the following is the most appropriate reason for this?

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Q.4719·Miscellaneous·2021·Easy

Which one of the following laws of electromagnetism does not give the direction of magnetic field?

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Q.4720·Miscellaneous·2021·Easy

Who amongst the following is a pioneer in discovering the heating effect of electric current?

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Q.4721·Miscellaneous·2021·Easy

Which of the following statements about ‘fission’ is correct? 1. It is related with the creation of new individuals by means of cell division in unicellular organism. 2. It is related with the transformation of heavier nuclei into smaller nuclei. 3. It is related with the creation of a heavier nuclei by means of combining two higher nuclei. Select the correct answer using the code given below:

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Q.4722·Miscellaneous·2021·Easy

We are given three copper wires of different lengths and different areas of cross-section. Which one of the following would have highest resistivity?

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Q.4723·Miscellaneous·2021·Easy

Which one of the following metals has both malleability and ductility properties?

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Q.4724·Miscellaneous·2021·Easy

Which one of the following elements is a non-metal but is lustrous?

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Q.4725·Miscellaneous·2021·Easy

One's actions exemplify one's attitude and values

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Q.4726·Miscellaneous·2021·Easy

A solution contains 20 g of solute in 180 g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage?

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Q.4727·Miscellaneous·2021·Easy

Which one of the following metals is kept immersed in Kerosene oil to protect it and to prevent accidental fire?

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Q.4728·Miscellaneous·2021·Easy

Which one of the following substances do silver articles react with, that makes the silver articles black?

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Q.4729·Miscellaneous·2021·Easy

Growing of two or more crops simultaneously on the same field in a definite pattern is known as

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Q.4730·Miscellaneous·2021·Easy

Osmosis is the process of movement of water molecules from its

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Q.4731·Miscellaneous·2021·Easy

Which cell organelles have their own DNA and Ribosomes?

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Q.4732·Miscellaneous·2021·Easy

A student was doing an experiment on increasing the cell division among plants. She asked her supervisor to suggest the specific plant hormone for the same. Had you been her supervisor, which plant hormone would you suggest?

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Q.4733·Miscellaneous·2021·Easy

A child receives a tall beautiful plant as a birthday gift from his father with a quiz. The father asked her how she would verify whether this tall plant was the progeny of both the tall parents or one tall and one short parent plant. She could verify this through

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Q.4734·Miscellaneous·2021·Easy

Cell wall is not present in cells of

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