Mercury is the _______ planet from the Sun.
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Which of the following is the treatment of water pollution?
The place on the earth's surface above the focus is called the __________.
What is the mean temperature of Earth?
Which among the following is false about Earth?
Which of the following is a wind based Indian musical instrument?
What is the source of natural energy of the hot springs at Manikaran in Himachal Pradesh ?
Land covers about ______ of the earth's surface.