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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.5131·Miscellaneous·2020·Easy

What is the maximum number of points of intersection of 5 non-overlapping circles?

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Q.5132·Miscellaneous·2020·Easy

What is the number of ways in which the letters of the word ‘ABLE’ can be arranged so that the vowels occupy even places?

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Q.5133·Miscellaneous·2020·Easy

Let A = [ a h g b f d g f c ] and B = [ x y z ], then what is AB equal to?

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Q.5134·Miscellaneous·2020·Easy

Let A = [ x + y 2 2x x - y ], B = [ 2 -1 ] and C = [ 3 2 ]. If AB = C, then what is the value of the determinant of matrix A?

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Q.5135·Miscellaneous·2020·Easy

Symbol of element was introduced by

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Q.5136·Miscellaneous·2020·Easy

Lead nitrate on heating gives

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Q.5137·Miscellaneous·2020·Easy

Which one of the following does not form oxide on reaction with oxygen ?

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Q.5138·Miscellaneous·2020·Easy

Which one of the following is a decommissioned aircraft carrier ?

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Q.5139·Miscellaneous·2020·Easy

Which one of the following oxides shows both acidic and basic behaviour ?

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Q.5140·Miscellaneous·2020·Easy

A mixture of sodium chloride (salt) and ammonium chloride can be separated by

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Q.5141·Miscellaneous·2020·Easy

Which one of the following is used for storing biological tissues ?

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Q.5142·Miscellaneous·2020·Easy

The radioactive isotope of hydrogen is

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Q.5143·Miscellaneous·2020·Easy

The valency of phosphorus is

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Q.5144·Miscellaneous·2020·Easy

A luminous object is placed at a distance of 40 cm from a converging lens of focal length 25 cm. The image obtained on the screen is

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Q.5145·Miscellaneous·2020·Easy

Which one of the following statements about phloem is correct ?

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Q.5146·Miscellaneous·2020·Easy

Which one among the following is a non-conventional source of energy ?

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Q.5147·Miscellaneous·2020·Easy

Which of the following lenses will bend the light rays through largest angle ?

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Q.5148·Miscellaneous·2020·Easy

Identify the correct pair of elements among the following which are liquid at room temperature and standard pressure.

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