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प्रश्न
State at least two ways of prevent rusting.
उत्तर
Two ways of prevention of rusting :
- Painting with red lead.
- Oil paint is applied on doors and windows.
- Enamel coating. Enamel is a mixture of iron, and steel with silicates.
- Coal tar it is used for coating the lower parts of ships and bridges.
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संबंधित प्रश्न
What do you observe when Magnesium is heated and then tested with moist blue and red litmus – paper?
State two differences between:
Rusting and burning.
Write ‘True’ or ‘False’ in front of following statement.
Nitrogen is a gaseous non-metal essential for respiration.
What happens when potassium nitrate is heated ?
What happens when Iron burns in oxygen ? Also give the balanced chemical equation for the reaction.
Write the balanced chemical equation of the manganese dioxide.
State how nitrogen is utilised by plants for their growth. Give a reason why nitrogen is used in flushing food packages.
Oxygen of the air is utilised for ‘combustiop’ and for ‘respiration’. Compare the two with a suitable examples.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Draw a neat labelled diagram for the method used in the above preparation.
Distinguish between:
Combustion and Respiration
