Q. In the earliest days when life originated on earth, the atmospheric obtained
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Q. The melting and boiling points of ionic solids are
Q. Which river is known as “Open Sewer” in India
Q. The orbits of planets around the Sun, or of satellites around the Earth can be
Q. The proportion of nitrogen in dry air is
Q. The atmospheric layer closest to the earth is:
Q. What happens when a ship crosses International Date Line from west to east ?
Q. Terrace farming is done on which of the following types of land?
Q. The Garo, Khasi and Jaintia hills were formed in the same age as the
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