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प्रश्न
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
To prevent rusting, the underside of the ships is coated with __________________.
उत्तर
To prevent rusting, the underside of the ships is coated with red lead oxide paint.
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संबंधित प्रश्न
State two differences between:
Rusting and burning.
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.
Describe simple experiments to show the presence of -
water vapour in air using a glass tumbler and ice.
Give the main experimental points only to demonstrate that candle-gains weight on burning.
Give reason for the following:
Combustion and respiration show similarity.
Name the following:
The pollutant which combines with water vapour to give sulphuric acid – a product of acid rain.
Name the following:
The gas required for both combustion and rusting.
Match the following
| 1. | Burning of meteors | a. | Exosphere |
| 2. | Weather change | b. | Stratosphere |
| 3. | Lowest temperature | c. | Mesosphere |
| 4. | Ozone layer | d. | Troposphere |
