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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.6967·Miscellaneous·2018·Easy

Which one of the following is called dry ice?

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Q.6968·Miscellaneous·2018·Easy

Which one of the following statements is not correct?

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Q.6969·Miscellaneous·2018·Easy

Which one of the following is a tribasic acid?

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Q.6970·Miscellaneous·2018·Easy

Which one of the following reactions will give NO (nitric oxide) gas as one of the products?

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Q.6971·Miscellaneous·2018·Easy

Permanent hardness of water cannot be removed by which one of the following methods?

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Q.6972·Miscellaneous·2018·Easy

Which one of the following is known as a zone of sharp salinity change in the vertical section of ocean?

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Q.6973·Miscellaneous·2018·Easy

What is (a – b) × (a + b) equal to ?

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Q.6974·Miscellaneous·2018·Easy

Which one of the following statements about temperature is correct?

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Q.6975·Miscellaneous·2018·Easy

Consider the following Wildlife Sanctuaries of India : 1. Shikari Devi 2. Bhadra 3. Simlipal 4. Pachmarhi Which one of the following is the correct order of the above Wildlife Sanctuaries in terms of their location from south to north?

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Q.6976·Miscellaneous·2018·Easy

Which one of the following is known as uplands of delta region?

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Q.6977·Miscellaneous·2018·Easy

Consider the following places of India : 1. Itanagar 2. Imphal 3. Agartala 4. Aizawl Which one of the following is the correct chronological order of the above places in terms of sunrise time?

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Q.6978·Miscellaneous·2018·Easy

If a free electron moves through a potential difference of 1 kV, then the energy gained by the electron is given by

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Q.6979·Miscellaneous·2018·Easy

Which one of the following is the correct relation between Å and nm?

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Q.6980·Miscellaneous·2018·Easy

A stainless steel chamber contains Ar gas at a temperature T and pressure P. The total number of Ar atoms in the chamber is n. Now Ar gas in the chamber is replaced by CO₂ gas and the total number of CO₂ molecules in the chamber is n/2 at the same temperature T. The pressure in the chamber now is P*. Which one of the following relations holds true? (Both the gases behave as ideal gases)

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Q.6981·Miscellaneous·2018·Easy

The magnetic field strength of a current-carrying wire at a particular distance from the axis of the wire

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Q.6982·Miscellaneous·2018·Easy

The frequency of ultrasound waves is

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Q.6983·Miscellaneous·2018·Easy

Which one of the following is called 'syngas'?

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Q.6984·Miscellaneous·2018·Easy

What is the formula mass of anhydrous sodium carbonate? (Given that the atomic masses of sodium, carbon and oxygen are 23 u, 12 u and 16 u respectively)

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