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Question
When lava cools quickly on the Earth's surface, it forms 'X'. 'X' is a very light rock used as body scrubber and to polish floors.
Identify 'X' in the above given paragraph.
When lava cools quickly on the Earth's surface, it forms 'X'. 'X' is a very light rock used as body scrubber and to polish floors.
Identify 'X' in the above given paragraph.
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Solution
The correct option is B Pumice
Pumice is a type of volcanic rock, produced when lava with a very high content of water and gases is discharged from volcano. Pumice is a very light rock which is used as body scrubber and to polish floor.
Pumice is a type of volcanic rock, produced when lava with a very high content of water and gases is discharged from volcano. Pumice is a very light rock which is used as body scrubber and to polish floor.
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