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प्रश्न
Naphthalene balls are obtained from coal tar and are used as
विकल्प
mosquito repellant
honey bee repellant
moth repellant
snake repellant
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उत्तर
moth repellant
Explanation:
Naphthalene balls are used to repel moths and other insects (in stored clothes, etc).
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संबंधित प्रश्न
Fossil fuels are ______, ______ and ______.
Coke is almost pure form of carbon.
Coal tar is a mixture of various substances.
Explain the following.
Petrol, diesel, and coal are fossil fuels.
Anthracite is known as the highest-grade coal. Give reason.
Coal is processed in industries to get some useful products. Which of the following is not obtained from coal?
When heated in air, coal burns and produces mainly ______ gas.
The black thick liquid with ______ smell is known as coal tar.
When lignite becomes darker and harder over time ______ coal is formed.
Activated carbon, used in filters for water and air purification and in ______ machines is obtained from coal.
