Combustion Process Overview

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What is the term for the lowest temperature at which a substance ignites?

Combustion temperature

Ignition temperature (correct)

Flame temperature

Calorific temperature

Which type of combustion releases a huge amount of heat and light at a high speed?

Spontaneous combustion

Controlled combustion

Rapid combustion (correct)

Slow combustion

What is the main difference between inflammable and combustible substances?

Combustible substances have a higher ignition temperature.

Inflammable substances react slowly with oxygen.

Inflammable substances easily catch fire with a flame. (correct)

Combustible substances produce less heat during combustion.

What is the visible gaseous part of a light called?

Flame Signup and view all the answers

Which of the following is a property of fuels?

They burn to produce heat energy. Signup and view all the answers

What is the process in which large amounts of gas are evolved along with tremendous heat, light, and sound?

Explosion Signup and view all the answers

What is the calorific value of a fuel?

The heat energy released on complete combustion of 1kg of the fuel Signup and view all the answers

Why is it difficult to burn a heap of green leaves compared to dry leaves?

Green leaves contain moisture, increasing their ignition temperature Signup and view all the answers

Why does a goldsmith use the outermost zone of a candle flame for melting gold and silver?

It is the hottest part of the flame Signup and view all the answers

Is rusting considered combustion? Why or why not?

No, because no heat is produced during rusting Signup and view all the answers

In which part of the flame should a beaker be placed to heat water fastest?

Outermost zone Signup and view all the answers

What is the unit for calorific value of a fuel?

Kilojoule per kilogram Signup and view all the answers

Combustion Process Overview

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Questions and Answers

What is the term for the lowest temperature at which a substance ignites?

Which type of combustion releases a huge amount of heat and light at a high speed?

What is the main difference between inflammable and combustible substances?

What is the visible gaseous part of a light called?

Which of the following is a property of fuels?

What is the process in which large amounts of gas are evolved along with tremendous heat, light, and sound?

What is the calorific value of a fuel?

Why is it difficult to burn a heap of green leaves compared to dry leaves?

Why does a goldsmith use the outermost zone of a candle flame for melting gold and silver?

Is rusting considered combustion? Why or why not?

In which part of the flame should a beaker be placed to heat water fastest?

What is the unit for calorific value of a fuel?

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