EASY
UPSC CAPF AC Paper - I
IMPORTANT
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Usually fuels on burning causes pollution. Which one of the following fuel causes minimum environmental pollution?

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Important Questions on Chemistry

EASY
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 234
Why is water not suitable for putting out a petrol fire?
MEDIUM
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 236
Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?
HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 237

Statement I: The main constituent of the liquefied petroleum gas is methane.

Statement II: Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.

HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 238
In the heavy vehicles, diesel is used as fuel because:
HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 239
To prevent from knocking the substance employed in the car engine is:
HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 240
Higher cetane number but lower octane number fuel is ideal for which of the following engines?
HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 241

Consider the following statements.

I. Liquified Natural Gas (LNG) is liquified under extremely cold temperatures and high pressure to facilitate storage of transportation in specially designed vessels.

II. First LNG terminal in India was built in Hassan.

III. Natural Gas Liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline.

Which of the above statement(s) is/are correct?

HARD
UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 242

Statement I: Carbon, sulphur, magnesium etc., are combustible substances.

Statement II: Those substances which burn in the presence of oxygen are known as combustible substances.