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प्रश्न
What are fuels?
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उत्तर
Fuels: The substances which burn in air to produce a large amount of energy in the form of heat and light are called fuels.
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संबंधित प्रश्न
Write down the composition of three main gases present in air by volume.
Give reason:
A burning candle stops burning if covered with a glass tumbler
Write ‘true’ or ‘false for the following;
The composition of air was discovered by Lavoisier.
Complete the statement given below by filling in the blank with the correct word from the words given:
The component of air which is variable in air above sea level and in air in general ______.
Name the following:
The type of bacteria which directly absorb nitrogen from the air and converted soluble nitrates in the soil.
Give word equation for the following conversion:
Nitric oxide to nitrogen dioxide
Compare the three main components of air i.e. nitrogen, oxygen and carbon dioxide with reference to their density and solubility, nature and reactivity.
Why is air considered as a mixture?
Give the components present in the air with a percentage?
______ is necessary for all acids.
