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प्रश्न
Give reason.
A wooden article should be polished.
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उत्तर
A wooden article should be polished because it protects the wooden article from sunlight and all other external conditions and also reduces the probability of wooden mites damaging the furniture.
संबंधित प्रश्न
Give reasons:
Platinum, gold and silver are used to make jewellery.
Fill in the following blank with suitable word:
The corrosion of iron is called ................
Explain why, through aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.
Bronze is an alloy of ______.
Give reason.
Copper and brass utensils should be tinned.
_______ forms a green colour in the water.
Complete flow chart given below.
Observe the following diagram and write answers.
- Name the method.
- Explain the method.
- Give two examples of this method.
The process of coating the surface of the metal with a thin layer of zinc is called ______
Give scientific reasons.
Silver amalgam is used for filling dental cavities.
