Earth & Atmosphere
12 questions available
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Q1.Which is the hottest layer of the Earth's atmosphere?
Correct Answer: A
Q2.Third most common gas that is found in the air to breath is:
Correct Answer: C
Correct answer is C: Argon
Q3.Third most common gas that is found in the air to breath is called:
Correct Answer: C
Correct Answer: Argon.
Q4.In which layer of the atmosphere are most of the clouds formed?
Correct Answer: B
Correct Answer: Troposphere.
Q5.To clean the ice from the roads during the winter season, which of the following is used?
Correct Answer: B
Correct Answer: Salt.
Q6.Which of the following gases is used in the refrigerator for cooling?
Correct Answer: B
Correct Answer: Ammonia.
Q7.Which of the following is the warmest ocean?
Correct Answer: A
Correct Answer: Indian Ocean.
Q8.The gas used to extinguish fires is:
Correct Answer: C
CO2 displaces oxygen around the flame, suffocating the fire (FPSC 2025).
Q9.Water reaches its maximum density at what temperature?
Correct Answer: C
Water expands as it cools below 4°C, making ice less dense than water (FPSC 2025).
Q10.The main component of natural gas (Sui Gas in Pakistan) is:
Correct Answer: C
Natural gas is composed of roughly 85% to 95% Methane (FPSC 2025).
Q11.Which gas is most abundant in the Earth's atmosphere?
Correct Answer: B
Nitrogen makes up roughly 78% of the atmosphere (FPSC 2025).
Q12.An instrument used to measure atmospheric pressure is called:
Correct Answer: C
Invented by Torricelli to measure air pressure (FPSC 2025).