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प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Enamelling is the process of baking a mixture of silicates on the surface of aluminium at a high temperature.
विकल्प
True
False
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उत्तर
False.
Enamelling is the process of baking a mixture of silicates on the surface of iron at a high temperature.
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संबंधित प्रश्न
Fill in the blanks :
_______ and ______ are the most common air pollutants.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Dust particles help in the ________ of water vapour in air.
What do you understand by the term polluted air?
______ is the active component of air.
_____ gas turns lime water milky.
Nitrogen is _______ than air.
Which gas in the atmosphere is essential for respiration?
What is the presence of harmful substance in the air called?
Explain carbon dioxide and its uses.
When air is moving with cool and soothing, it is called a cyclone.
