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Q. What is coal?
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Q. Which one of the following substances does not have a melting point
Q. The noble gas used in radiotherapy is
Q. Most of the explosions in mines occur due to the mixing of
Q. Identify the thermosetting plastic from the given options:
Q. In ethane, each carbon atom is bonded to
Q. For purifying drinking water alum is used
Q. Vinegar is acidic in nature due to the presence of
Q. Chemical formula of washing soda is
Q. The element present in the largest amount in rocks and minerals is
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