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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.4159·Miscellaneous·2021·Easy

What is the domain of the function f(x) = 3^x?

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Q.4160·Miscellaneous·2021·Easy

Consider the following statements in respect of the function f(x) = sin x : 1. f(x) increases in the interval (0, π). 2. f(x) decreases in the interval (5π/2, 3π). Which of the above statements is/are correct?

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Q.4161·Miscellaneous·2021·Easy

Advantage(s) of tectonic activity in Iceland include(s): 1.Source of natural geothermal energy 2.Creation of new land 3.Attraction of tourists Select the correct answer using the code given below:

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Q.4162·Miscellaneous·2021·Easy

If the function f(x) = a + bx, x < 1 5, x = 1 b - ax, x > 1 is continuous, then what is the value of (a + b)?

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Q.4163·Miscellaneous·2021·Easy

In a typical flower, germinating pollen grains pass through several parts of the gynoecium before they reach the ovule. A list of the parts of gynoecium is given below in different combinations. Choose the combination that represents the correct sequence of pollen tube pathway/journey:

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Q.4164·Miscellaneous·2021·Easy

During seed germination, the part of the embryo which grows into root is

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Q.4165·Miscellaneous·2021·Easy

The process whereby certain minerals absorb water, expand and change is called as

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Q.4166·Miscellaneous·2021·Easy

Which one of the following is the longest Latitude?

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Q.4167·Miscellaneous·2021·Easy

If it is 12:00 Noon in India, on which meridian will it be 7:00 am of the same day?

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Q.4168·Miscellaneous·2021·Easy

Which one of the following statements is true for a simple harmonic oscillator?

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Q.4169·Miscellaneous·2021·Easy

Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave?

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Q.4170·Miscellaneous·2021·Easy

'Beats' is a phenomenon that occurs when frequencies of two harmonic waves are

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Q.4171·Miscellaneous·2021·Easy

Which one of the following cannot be the unit of frequency of a sound wave?

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Q.4172·Miscellaneous·2021·Easy

Twinkling of stars is due to

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Q.4173·Miscellaneous·2021·Easy

Which one of the following is not a bio-mass energy source?

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Q.4174·Miscellaneous·2021·Easy

Which one of the following acids is predominantly found in tomatoes?

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Q.4175·Miscellaneous·2021·Easy

Which one of the following reactions does not result in the evolution of hydrogen gas?

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Q.4176·Miscellaneous·2021·Easy

Which one of the following materials is not an allotrope of carbon?

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