Combustion and Flame

This is an MCQ-based quiz on Combustion and Flame.

It covers gaseous fuel, solid fuel, heat energy

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Which of the following is not a fossil fuel?

Coal Petroleum Natural gas Water gas

Magnesium ribbon on burning in air produces:

Magnesium oxide water and light Magnesium oxide and heat Magnesium oxide heat and light Magnesium oxide water and heat

In which of the following sentences are incorrect?

A chemical process in which a substance reacts with oxygen to give off heat, is called combustion. When the clothes of a person catch fire, the person is covered with the blanket to extinguish fire. The lowest temperature at which a substance catches fire is called, its ignition temperature. The substances which give very high ignition, temperature and can easily catch fire with a flame, are called inflammable substances.

Which of the following represents the correct statements?

Outer zone of complete combustion is the hottest part which is blue in colour. Middle zone of partial combustion is the moderate hot part which is yellow in colour. Innermost zone of unburnt wax vapours is least hot which is black in colour. All the above

Shyam was cooking potato curry on a chulha. To his surprise, he observed that the copper vessel was getting blackened from outside. It may be due to:

Proper combustion of fuel Improper cooking of potato curry Improper combustion of fuel Burning of copper vessel

In which of the following statements is or are correct?

A physical process in which a substance reacts with oxygen to give off heat is called combustion. Water is the best extinguisher for fire involving electrical equipment. Alcohol, CNG and LPG are inflammable substances. Increased concentration of nitrogen in air is believed to cause global warming.

When we heat water in a paper bowl over a candle, the paper does not catch fire because

Paper is not inflammable

Paper gets wet

Due to water the ignition temperature of paper is not reached

This is not possible

The amount of heat energy produced on complete combustion of_____ fuel is called its calorific value.

1 litre

1 Kg

1 milli litre

1 gram

A chemical process in which a substance reacts with oxygen to give off heat is called

Conduction

Conjunction

Combustion

Confusion

Which of the following fuel produces ash on burning:

Wood

LPG

Petrol

Diesel

The zone of a flame used by goldsmith for melting gold and silver is:

Innermost zone

Middle zone

Outermost zone

All of these

Is heat and light produced by Sun a combustion process?

Yes

Can’t say

None of these

Ignition temperature is the:

Temperature at which a substance catches fire

Highest temperature at which a substance catches fire

Lowest temperature at which a substance catches fire

None of these

Which is non-renewable source of energy’?

Natural gas

Wind energy

Tidal energy

Mechanical energy

The burning of LPG is an example of

Rapid combustion

Spontaneous combustion

Slow combustion

Explosion

Which gas helps in the process of combustion?

Cooking gas

Nitrogen gas

Oxygen gas

Producer gas

A temperature at which the substance burns is called

Melting

Boiling temperature

Kindling temperature

Evaporation

Can the process of rusting be called combustion ?

Yes

Can’t say

None of these

The substances which have very low ignition temperature and can easily catch fire with a flame are called

Inflammable substances

Flaming substance

Fire proof substance

None of the above

Fuel may be

Solid only

Solid,Liquid or gas

Liquid only

Gas only

Quiz/Test Summary

Title: Combustion and Flame

Questions: 20

Contributed by:

Diego Thu, Feb 03, 2022 05:13 PM UTC

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