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प्रश्न
State two most important conditions for rusting.
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उत्तर
Two most important conditions for msting are (1) presence of air and (2) moisture.
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संबंधित प्रश्न
Define the term acid rain.
State at least two ways of prevent rusting.
Write ‘True’ or ‘False’ in front of following statement.
Nitrogen is a gaseous non-metal essential for respiration.
Write the balanced chemical equation of the manganese dioxide.
Oxygen of the air is utilised for ‘combustiop’ and for ‘respiration’. Compare the two with a suitable examples.
Describe simple experiments to show the presence of -
oxygen and nitrogen component in air using a bell jar
Describe simple experiments to show the presence of -
water vapour in air using a glass tumbler and ice.
Identify the acidic oxides responsible for acid rain. State how their presence results in formation of acid rain. Give a reason why acid rain damages heritage buildings.
Distinguish between:
Combustion and Respiration
Give reason for the following:
Combustion and respiration show similarity.
