2025 UPPCS Previous Year Questions – GS Paper I

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.
Select the correct answer from the code given below:

Select an option to check your answer

2025ScienceGS Paper I

Which of the following gasses is/are lighter than air?
1. Hydrogen chloride
2. Sulfur dioxide
3. Helium
Select the correct answer from the code given below :
Code:

Select an option to check your answer

2025ScienceGS Paper I

With reference to 'acid and bases', which of the following statements is/are correct?
1. Acidic solutions have pH more than 7.
2. Basic solutions have pH less than 7.
Select the correct answer from the code given below:

Select an option to check your answer

2025ScienceGS Paper I

Which of the following pairs is/are NOT correctly matched?

(Acid)	(Acid found in)
1. Lactic acid	Curd
2. Tartaric acid	Grapes
3. Acetic acid	Potato

Select the correct answer from the code given below:

Select an option to check your answer

2025ScienceGS Paper I

With reference to 'Silver articles', which of the following statements is/are correct?
1. Silver articles turn black after some time when exposed to air.
2. It happens due to coating of silver sulphide.
Select the correct answer from the code given below:
Code:

Select an option to check your answer