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प्रश्न
State whether the following statement is True/False.
Air is necessary for combustion.
विकल्प
True
False
उत्तर
This statement is True.
Explanation -
Air contains oxygen and oxygen is a supporter of combustion.
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संबंधित प्रश्न
A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance?
Some words (underlined) in the following sentence is jumbled up. Write them in their correct form.
Slaags is a non-combustible material.
Some words (underlined) in the following sentence is jumbled up. Write them in their correct form.
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its ficalroic value.
Match the items of Column A with the items of Column B.
| Column A | Column B |
| (a) Oxides of sulphur and nitrogen | (i) fire extinguisher |
| (b) CNG | (ii) incomplete combustion of coal |
| (c) Oxygen | (iii) very low ignition temperature |
| (d) inflammable substance | (iv) acid rain |
| (e) carbon dioxide | (v) necessary for combustion |
| (f) carbon monoxide | (vi) fuel for automobiles |
People usually keep angithi/burning coal in their closed rooms during winter season. Why is it advised to keep the door open?
Which of the following conditions is not necessary for combustion?
The chemical process in which a substance reacts with oxygen to produce heat is called ______.
Give one example of slow combustion.
Fill in the blanks using the word given in the box.
| ignition | petrol | combustion | calorific value | combustible | combustible |
The lowest temperature at which a substance catches fire is called its ______ temperature.
Fill in the blanks using the words given in the box.
| ignition | petrol | combustion | calorific value | combustible | combustible |
Ignition temperature of ______ is lower than that of wood.
