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Question
Which of the following elements is a solid that is extracted as a liquid from the earth by boring a hole in the ground and pumping it out with super-heated steam?
Which of the following elements is a solid that is extracted as a liquid from the earth by boring a hole in the ground and pumping it out with super-heated steam?
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Solution
The correct option is C Sulphur
- The basic principle of extraction of sulphur is it is melted underground and pumped up to the surface of the earth. A bore is made to the underground deposits of sulphur and three concentric pipes are sunk into the bore.
- Superheated steam at 170 oC under 16 atm is pumped down the outer most pipe . Since melting point of sulphur is 113oC , it is melted and collects at the bottom. Hot compressed air is blown down the inner most pipe to produce foam of molten sulphur . This foam rises through the annular space between the inner most pipe and the next. The foam of sulphur is collected in wooden tubs. After few hours, sulphur is converted into solid blocks.
- Hence option B is correct answer.
- The basic principle of extraction of sulphur is it is melted underground and pumped up to the surface of the earth. A bore is made to the underground deposits of sulphur and three concentric pipes are sunk into the bore.
- Superheated steam at 170 oC under 16 atm is pumped down the outer most pipe . Since melting point of sulphur is 113oC , it is melted and collects at the bottom. Hot compressed air is blown down the inner most pipe to produce foam of molten sulphur . This foam rises through the annular space between the inner most pipe and the next. The foam of sulphur is collected in wooden tubs. After few hours, sulphur is converted into solid blocks.
- Hence option B is correct answer.
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