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📘 MCQs on LPG, LNG & Other Gases

(By Home Academy Science)

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🔹 Section 1: Basic MCQs

Q1. LPG mainly consists of:
A. Methane
B. Ethane
C. Propane and Butane
D. Hydrogen

✅ Answer: C. Propane and Butane

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Q2. LNG is primarily composed of:
A. Butane
B. Methane
C. Propane
D. Ethylene

✅ Answer: B. Methane

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Q3. LNG is stored at:
A. High pressure
B. Room temperature
C. -162°C
D. 0°C

✅ Answer: C. -162°C

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Q4. CNG is stored in:
A. Liquid form at low temperature
B. Solid form
C. Gas under high pressure
D. Plasma state

✅ Answer: C. Gas under high pressure

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Q5. Which gas is most environmentally friendly?
A. LPG
B. CNG
C. Coal gas
D. LPG + LNG

✅ Answer: B. CNG

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🔹 Section 2: Statement-Based Questions (Conceptual)

Q6. Consider the following statements:

1. LPG is heavier than air

2. CNG is lighter than air

3. LNG is stored at very low temperature

Which is correct?
A. 1 and 2 only
B. 2 and 3 only
C. 1, 2 and 3
D. 1 only

✅ Answer: C. 1, 2 and 3

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Q7. Which of the following statements is/are correct?

1. LNG occupies less volume than natural gas

2. LPG is stored in liquid form

3. CNG produces more pollution than petrol

A. 1 and 2 only
B. 2 and 3 only
C. 1 only
D. 1, 2 and 3

✅ Answer: A. 1 and 2 only

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🔹 Section 3: Match the Following

Q8. Match the gases with their characteristics:

Gas	Characteristic
A. LPG	1. Stored at -162°C
B. LNG	2. Propane + Butane
C. CNG	3. High pressure gas

A-2, B-1, C-3

✅ Answer: Correct match

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🔹 Section 4: Previous Year Questions (PYQs)

Q9. (SSC Exam)
Which fuel is used in vehicles as a cleaner alternative to petrol and diesel?
A. LPG
B. CNG
C. Coal
D. Biogas

✅ Answer: B. CNG

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Q10. (RRB Exam)
Which gas is used in domestic cooking cylinders?
A. LNG
B. CNG
C. LPG
D. Hydrogen

✅ Answer: C. LPG

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Q11. (NEET Level)
Natural gas is mainly composed of:
A. Ethane
B. Propane
C. Methane
D. Butane

✅ Answer: C. Methane

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🔹 Section 5: Assertion & Reason

Q12. Assertion (A): LNG is easier to transport than natural gas
Reason (R): LNG occupies less volume

A. Both A and R are true and R explains A
B. Both true but R not explanation
C. A true, R false
D. A false, R true

✅ Answer: A

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🔹 Section 6: Advanced MCQs

Q13. Which gas is produced from organic waste?
A. LPG
B. LNG
C. Biogas
D. CNG

✅ Answer: C. Biogas

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Q14. Which fuel has zero carbon emission?
A. LPG
B. LNG
C. Hydrogen
D. CNG

✅ Answer: C. Hydrogen

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🔥 Most Repeated Exam Facts (Important)

LPG = Propane + Butane

LNG = Methane (liquid form)
CNG = Methane (compressed)
Cleanest fuel = Hydrogen
Green fuel for vehicles = CNG
LNG storage temp = -162°C

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🎯 Practice Booster (Very Important)

Q15. Which one is NOT correctly matched?
A. LPG – Domestic fuel
B. LNG – Stored at high temperature
C. CNG – Vehicle fuel
D. Biogas – Renewable energy

👉 Try yourself!

✅ Answer: B (LNG is stored at low temperature)

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