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प्रश्न
Give the chemical name of rust.
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उत्तर
The chemical name of rust is hydrated iron oxide [Fe2OrxH2O]
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Define the term smog.
Complete and balance the following chemical equation.
CaO + H2O → ____________
Name and briefly explain four ways by which pollution of air is caused by humans.
What is the presence of harmful substance in the air called?
The composition of air changes slightly from place to place. Give examples.
______ is used as a substitute for compressed air in tyres.
Oxygen is used to oxidize ______.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
A weather cock shows the ______ in which the air is moving at that place.
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Oxygen
