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प्रश्न
What are fuels?
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
Answer the question put against the following constituents of air :
Carbon dioxide : “Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air.” Support this statement with relevant facts.
Tick (√ ) the most appropriate answer.
Magnesium burns with a dazzling white flame to form magnesium oxide, a powdery mass. The colour of magnesium oxide is :
Write ‘true’ or ‘false for the following;
The composition of air was discovered by Lavoisier.
State a reason why there is a balance in the amount of carbon dioxide in the air, even though carbon dioxide is released into the atmopshere by various processes.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The mesosphere in the atmosphere, contains most of the air, fit for respiration
Write about the reaction of nitrogen with non metals.
What was the old name of nitrogen?
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere
carbon dioxide
