Q. The gas that usually causes explosions in coal mines is
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Q. What is the chemical name of vinegar -
Q. The iron ore magnetite consists of
Q. Which one of the following substances does not have a melting point
Q. Detergents produce lather with hard water because
Q. Which among the following element is an essential constituent of acids?
Q. The charge on position is equal to the charge on
Q. Combustion of a candle is a/an
Q. Wood charcoal is commonly prepared by the process of burning wood
Q. Which of the following is used as non-stick coating for cooking utensils?
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