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Questions and Answers
What is the term for the lowest temperature at which a substance ignites?
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?
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?
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?
What is the visible gaseous part of a light called?
Which of the following is a property of fuels?
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 process in which large amounts of gas are evolved along with tremendous heat, light, and sound?
What is the calorific value of a fuel?
What is the calorific value of a fuel?
Why is it difficult to burn a heap of green leaves compared to dry leaves?
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?
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?
Is rusting considered combustion? Why or why not?
In which part of the flame should a beaker be placed to heat water fastest?
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?
What is the unit for calorific value of a fuel?
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