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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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  2. /Prelims Questions
Q.10513·Miscellaneous·2015·Easy

Match List I with List II and select the correct answer using the code given below the Lists : List I (Compound) List II (Nature) A. Sodium hydroxide 1. Strong acid B. Calcium oxide 2. Alkali C. Acetic acid 3. Weak acid D. Hydrochloric acid 4. Base

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Q.10514·Miscellaneous·2015·Easy

Energy is required for maintenance of life. It is obtained by a process called

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Q.10515·Miscellaneous·2015·Easy

All life forms contain "molecules of life". These are

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Q.10516·Miscellaneous·2015·Easy

If a charged particle (+q) is projected with certain velocity parallel to the magnetic field, then it will

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Q.10517·Miscellaneous·2015·Easy

Which one of the following is not a result of surface tension ?

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Q.10518·Miscellaneous·2015·Easy

The displacement-time graph of a particle acted upon by a constant force is

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Q.10519·Miscellaneous·2015·Easy

If radius of the earth were to shrink by 1%, its mass remaining the same, g would decrease by nearly

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Q.10520·Miscellaneous·2015·Easy

Optical fibres, though bent in any manner, allows light to pass through. What is the inference that one can draw from it ?

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Q.10521·Miscellaneous·2015·Easy

Look at the underlined part of each sentence. Below each sentence are given three possible substitutions for the underlined part. If one of them, (a), (b) or (c), is better than the underlined part, indicate your response on the Answer Sheet against the corresponding letter (a), (b) or (c). If none of the substitutions improve the sentence, indicate (d) as your response on the Answer Sheet. Thus a ‘No improvement’ response will be signified by the letter (d). While we would like that all Indian children to go to school, we need to ponder why they do not.

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Q.10522·Miscellaneous·2015·Easy

Look at the underlined part of each sentence. Below each sentence are given three possible substitutions for the underlined part. If one of them, (a), (b) or (c), is better than the underlined part, indicate your response on the Answer Sheet against the corresponding letter (a), (b) or (c). If none of the substitutions improve the sentence, indicate (d) as your response on the Answer Sheet. Thus a ‘No improvement’ response will be signified by the letter (d). You are warned against committing the same mistake again.

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Q.10523·Miscellaneous·2015·Easy

Consider x = tan⁻¹(1/5), y = tan⁻¹(1/70) and z = tan⁻¹(1/99) What is x equal to?

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Q.10524·Miscellaneous·2015·Easy

Consider the triangle ABC with vertices A(-2, 3), B(2, 1) and C(1, 2) What is the circumcentre of the triangle ABC?

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Q.10525·Miscellaneous·2015·Easy

Consider the triangle ABC with vertices A(-2, 3), B(2, 1) and C(1, 2). What is the centroid of the triangle ABC?  

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Q.10526·Miscellaneous·2015·Easy

Consider the triangle ABC with vertices A(-2, 3), B(2, 1) and C(1, 2). What is the foot of the altitude from the vertex A of the triangle ABC?  

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Q.10527·Miscellaneous·2015·Easy

A line passes through (2, 2) and is perpendicular to the line 3x + y = 3. Its y-intercept is

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Q.10528·Miscellaneous·2015·Easy

The perpendicular distance between the straight lines 6x + 8y + 15 = 0 and 3x + 4y + 9 = 0 is

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Q.10529·Miscellaneous·2015·Easy

The area of a triangle, whose vertices are (3, 4), (5, 2) and the point of intersection of the lines x = a and y = 5, is 3 square units. What is the value of a?

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Q.10530·Miscellaneous·2015·Easy

The length of perpendicular from the origin to a line is 5 units and the line makes an angle 120° with the positive direction of x-axis. The equation of the line is

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