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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.541·Miscellaneous·2025·Easy

Which one of the following statements regarding oxidation and reduction reactions is NOT correct ?

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Q.542·Miscellaneous·2025·Easy

Which one of the following is also known as Dry ice in its solid form?

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Q.543·Miscellaneous·2025·Easy

Let X be a random variable following binomial distribution whose mean and variance are 200 and 160 respectively. What is the value of the number of trials (n)?

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Q.544·Miscellaneous·2025·Easy

Statement I: Some rare earth elements are used in the manufacture of flat television screens and computer monitors. Statement II: Some rare earth elements have phosphorescent properties. Which one of the following is correct in respect of the above statements?

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Q.545·Miscellaneous·2025·Easy

Placing the earliest first, arrange the following countries in the chronological order in which they granted universal adult franchise: 1. USA 2. Sri Lanka 3. Japan 4. India Select the answer using the code given below:

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Q.546·Miscellaneous·2025·Easy

Which one of the following statements is NOT correct?

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Q.547·Miscellaneous·2025·Easy

Which one of the following statements is correct?

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Q.548·Miscellaneous·2025·Easy

Consider the following pairs : Country Resource-rich in I. Botswana : Diamond II. Chile : Lithium III. Indonesia : Nickel How many of the above rows is the given information correctly matched?

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Q.549·Miscellaneous·2025·Easy

Which one of the following particles in the nucleus of an atom was discovered by J. Chadwick?

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Q.550·Miscellaneous·2025·Easy

Temperate forests of South India, known as 'Sholas' are found in which of the following hills? 1. Anaimalai 2. Nilgiris 3. Palani Select the answer using the code given below:

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Q.551·Miscellaneous·2025·Easy

Consider the following pairs : Region Country I. Mallorca : Italy II. Normandy : Spain III. Sardinia : France How many of the above rows is the given information correctly matched?

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Q.552·Miscellaneous·2025·Easy

Which one of the following findings is NOT observed in Rutherford's Nuclear Model of Atom?

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Q.553·Miscellaneous·2025·Easy

Indian Railways have prepared a National Rail Plan (NRP) to create a 'future ready' railway system by 2028. II. 'Kavach' is an Automatic Train Protection system developed in collaboration with Germany. III. 'Kavach' system consists of RFID tags fitted on track in station section. Which of the statements given above are not correct?

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Q.554·Miscellaneous·2025·Easy

Which of the following main industry/ industries was/were developed in the second industrial revolution that took place after about 1850?

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Q.555·Miscellaneous·2025·Easy

Height (in cm) Number of Students 160-162 12 162-164 15 164-166 24 166-168 13 What is the median height of the class?

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Q.556·Miscellaneous·2025·Easy

Which among the following materials was used in making the Harappan seals ?

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Q.557·Miscellaneous·2025·Easy

Let (x+y)p+q=x^p y^q, where p,q are positive integers. The derivative of y with respect to x

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Q.558·Miscellaneous·2025·Easy

A function f is such that f(xy)=f(x)+f(y) for all real values of x and y, and f(5)=10. What is f(0) equal to?

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