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Students were carrying out an experiment...

Students were carrying out an experiment in the laboratory, in which one of the steps involved heating the alcohol. However, the teacher strictly instructed the students not to heat alcohol directly on flame. Why do you think the teacher gave such an instruction?

A

The temperature of the flame is not high enough to heat alcohol.

B

Alcohol is highly inflammable.

C

The heat of the flame is sufficient enough to overcome the ignition temperature of alcohol and it can easily catch fire.

D

Both (b) and (c)

Text Solution

Verified by Experts

The correct Answer is:
D
The minimum temperature required for a combustible substance to catch fire is known as ignition temperature. The temperature of flame is higher enough to overcome ignition temperature of alcohols and the substances which can easily set on fire are known as inflammable substances.
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MTG IIT JEE FOUNDATION-COMBUSTION AND FLAME -EXERCISE (MULTIPLE CHOICE QUESTIONS) LEVEL 1
  1. Hydrogen satisfies the conditions of an ideal fuel but cannot be used ...

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  2. The hottest part of the Bunsen burner is

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  3. Read the following statements. 1. Water is the best extinguisher fo...

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  4. Flames of the mixture .......... are used for welding.

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  5. The formation of soot occurs when

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  6. The necessary conditions for combustion process to occur are 1. ava...

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  7. When you introduce a glass plate into the luminous zone of a candle fl...

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  8. Which of the following diagrams shows a non-luminous flame?

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  9. Students were carrying out an experiment in the laboratory, in which o...

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  10. What does this experiment show?

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  11. Which of the following is highly inflammable?

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  12. A spoon was kept in contact with ice cubes for some time. Later, the s...

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  13. When the matchstick strikes against the rubbing surface, what happens ...

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  14. Which statement best explains the spontaneous combustion?

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  15. State which of the following statements is false.

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  16. Identify the correct statements. (i) Carbon dioxide is used to exti...

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  17. Which of the following statements is/are correct? I. The flame of a ...

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  18. The different zones of a candle flame are marked by the letters A, B a...

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  19. The upper most part of match stick is made up of

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  20. Cheenu sets up an experiment as shown in the figure. What do you...

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