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प्रश्न
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Loca is obtained from mines.
उत्तर
Coal is obtained from mines.
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संबंधित प्रश्न
Coke is almost pure form of carbon.
Coal tar is a mixture of various substances.
Coal is formed from the remains of
Naphthalene balls are obtained from coal tar and are used as
Fill in the blanks in the following sentence.
When heated in air, coal burns and produces mainly ______ gas.
The slow process of conversion of dead vegetation into coal is called ______.
During the processing of coal to get coke, coal tar and ______ are also obtained.
Coal reserves are said to be enough to last for another hundred years. Do you think we need to worry in such case? Why or why not?
Activated carbon, used in filters for water and air purification and in ______ machines is obtained from coal.
Coke is used in the preparation of dyes, explosives, paints synthetic fibers, and pesticides.
