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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.4033·Miscellaneous·2021·Easy

A uniform motion of a car along a circular path experiences

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Q.4034·Miscellaneous·2021·Easy

Three equal resistors are connected in parallel configuration in a closed electrical circuit. Then the total resistance in the circuit becomes

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Q.4035·Miscellaneous·2021·Easy

What is the maximum number of electrons in the M-Shell ?

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Q.4036·Miscellaneous·2021·Easy

Chlorine occurs in nature in two isotopic forms of masses 35 u and 37 u in the ratio of 3:1 respectively. What is the average atomic mass of the Chlorine atom?

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Q.4037·Miscellaneous·2021·Easy

Which one of the following elements' isotopes is used in the treatment of cancer ?

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Q.4038·Miscellaneous·2021·Easy

To protect steel and iron from rusting, a thin layer of which one of the following metals is applied?

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Q.4039·Miscellaneous·2021·Easy

Cinnabar is an ore of which one of the following?

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Q.4040·Miscellaneous·2021·Easy

Imagine a current-carrying straight conductor with magnetic field of lines in anti-clockwise direction. Then the direction of current is determined by

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Q.4041·Miscellaneous·2021·Easy

The device used to produce electric current is known as

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Q.4042·Miscellaneous·2021·Easy

Myopia is a defect in human vision where an image of a

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Q.4043·Miscellaneous·2021·Easy

Tyndall effect is a phenomenon of

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Q.4044·Miscellaneous·2021·Easy

Twinkling of stars is primarily due to the atmospheric

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Q.4045·Miscellaneous·2021·Easy

Cornea in human eye

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Q.4046·Miscellaneous·2021·Easy

What is the total number of chambers in the stomach of domestic animals like cattle, buffalo, goat and sheep?

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Q.4047·Miscellaneous·2021·Easy

Intestinal bacteria are main source of which one of the following vitamins?

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Q.4048·Miscellaneous·2021·Easy

Which one of the following hormones is responsible for the development of female sexual characters?

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Q.4049·Miscellaneous·2021·Easy

Spherical mirror formula relating an object distance 'u', image distance 'v' and focal length of mirror 'f' may be applied to a plane mirror when

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Q.4050·Miscellaneous·2021·Easy

Nuclear energy is generated by

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