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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.13861·Miscellaneous·2012·Easy

Consider the following figure: Which of the following labelled points in the figure given above indicate unstable state of an object?

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Q.13862·Miscellaneous·2012·Easy

Given below is an approximate composition of a substance : 1.CaO 60–70% 2. SiO₂ 20–25% 3. Al₂O₃ 5–10% 4. Fe₂O₃ 2–3% The substance is

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Q.13863·Miscellaneous·2012·Easy

Which one among the following is the correct order of strength of acids ?

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Q.13864·Miscellaneous·2012·Easy

Which one among the following is a double salt ?

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Q.13865·Miscellaneous·2012·Easy

Deionised water is produced by

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Q.13866·Miscellaneous·2012·Easy

Which one among the following is the equivalent weight of sulphuric acid ? (Atomic weight : H = 1, S = 32, O = 16)

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Q.13867·Miscellaneous·2012·Easy

If the matrix AB is a zero matrix, then which one of the following is correct ?

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Q.13868·Miscellaneous·2012·Easy

If the sum of the matrices [x y; x y; y z] and [z 10; 0 5; 0 5] is the matrix [10 10; 5 5; 5 5], then what is the value of y ?

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Q.13869·Miscellaneous·2012·Easy

Which one among the following equations is correctly balanced ?

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Q.13870·Miscellaneous·2012·Easy

If A = [3 4; 5 6; 7 8] and B = [3 5 7; 4 6 8], then which one of the following is correct ?

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Q.13871·Miscellaneous·2012·Easy

The most important raw materials used in the manufacture of cement are

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Q.13872·Miscellaneous·2012·Easy

The inverse of a diagonal matrix is a :

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Q.13873·Miscellaneous·2012·Easy

Consider the following statements : 1. Diamond is hard and graphite is soft. 2. Diamond is soft and graphite is hard. 3. Diamond is a bad conductor but graphite is a good conductor. 4. Diamond is a good conductor but graphite is a bad conductor. Which of the statements given above is/are correct ?

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Q.13874·Miscellaneous·2012·Easy

Match List I with List II and select the correct answer using the code given below the Lists : List I (Scientist) List II (Discovery) A. Goldstein 1. Atomic theory B. Chadwick 2. Proton C. JJ Thomson 3. Neutron D. John Dalton 4. Electron Code:

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Q.13875·Miscellaneous·2012·Easy

If each element in a row of a determinant is multiplied by the same factor r, then the value of the determinant :

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Q.13876·Miscellaneous·2012·Easy

Which one among the following does not have an allotrope ?

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Q.13877·Miscellaneous·2012·Easy

The angles of a triangle are in AP and the least angle is 30°. What is the greatest angle (in radian) ?

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Q.13878·Miscellaneous·2012·Easy

Match List I with List II and select the correct answer using the code given below the Lists : List I (Compound) List II (Use) A. Cellulose nitrate 1. Soft soap B. Potassium sulphate 2. Gun powder C. Potassium salt of fatty acids 3. Fertilizer D. Calcium oxide 4. Glass Code:

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