Science UPPCS Previous Year Questions with Answers

2025ScienceGS Paper I

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A): Voices of men and women are different.
Reason (R): Length and thickness of vocal cord is different in men and women.
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2025ScienceGS Paper I

With reference to 'Isotopes', which of the following statements is/are correct?
1. Atoms with identical atomic numbers but different atomic mass numbers are known as isotopes.
2. Protium, Deuterium and Tritium are isotopes of carbon.
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2025ScienceGS Paper I

Arrange the following electromagnetic radiations in decreasing order of their frequencies.
1. Gamma rays
2. Ultraviolet rays
3. Radio waves
4. X-rays
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2025ScienceGS Paper I

Which of the following gasses is/are lighter than air?
1. Hydrogen chloride
2. Sulfur dioxide
3. Helium
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2025ScienceGS Paper I

Which of the following enzymes is/are released in stomach for protein digestion?
1. Chymotrypsin
2. Trypsin
3. Pepsin
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