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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.13933·Miscellaneous·2012·Easy

What is the number of diagonals which can be drawn by joining the angular points of a polygon of 100 sides ?

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Q.13934·Miscellaneous·2012·Easy

In this question, some parts of the sentences have been jumbled up. You are required to rearrange these parts which are labelled P, Q, R, S to produce the correct sentence. Choose the proper sequence and mark in your answer sheet accordingly. (P) in his innocence (Q) I believed (R) of the charge (S) and acquittal The correct sequence should be

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Q.13935·Miscellaneous·2012·Easy

In this question, some parts of the sentences have been jumbled up. You are required to rearrange these parts which are labelled P, Q, R, S to produce the correct sentence. Choose the proper sequence and mark in your answer sheet accordingly. (P) My little sister (Q) in school (R) instead of reading books (S) who was quite intelligent played with dolls The correct sequence should be

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Q.13936·Miscellaneous·2012·Easy

Consider the following statements : 1.(ω¹⁰ + 1)⁷ + ω = 0 2.(ω¹⁰⁵ + 1)¹⁰ = p¹⁰ for some prime number p where ω is a cubic root of unity. Which of the above statements is/are correct ?

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Q.13937·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.13938·Miscellaneous·2012·Easy

The inverse of a diagonal matrix is a :

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Q.13939·Miscellaneous·2012·Easy

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

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Q.13940·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.13941·Miscellaneous·2012·Easy

Which one among the following equations is correctly balanced ?

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Q.13942·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.13943·Miscellaneous·2012·Easy

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

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Q.13944·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.13945·Miscellaneous·2012·Easy

Deionised water is produced by

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Q.13946·Miscellaneous·2012·Easy

Which one among the following is a double salt ?

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Q.13947·Miscellaneous·2012·Easy

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

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Q.13948·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.13949·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.13950·Miscellaneous·2012·Easy

(i) In this question, a number of sentences are given. The sentences are underlined in three separate parts and each one is labelled (a), (b), (c). Read each sentence to find out whether there is an error in any underlined part. No sentence has more than one error. When you find an error in any one of the underlined parts (a), (b) or (c), indicate your responses on the Answer Sheet at the appropriate space. You may feel that there is no error in a sentence. In that case, (d) will signify a ‘No error’ response. (ii) Errors may be in grammar, word usage or idioms. There may be a word missing or there may be a word which should be removed. (iii) You are not required to correct the error. You are required only to indicate your response on the answer sheet. (a) He told his friends that (b) each of them (c) should be able to carry out the orders oneself (d) No error

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