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Q. In an electric kettle water becomes hot by
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Q. Who invented fuel cells in 1839?
Q. Water is a good solvent of ionic salts because:
Q. An egg sinks in soft water but floats in a concentrated solution of salt as
Q. When Hydrogen starts burning in air, it produces
Q. The basic chemical building block of natural rubber obtained from trees is
Q. Electric fuse is an alloy of
Q. Which of the following nitrogenous base is present in DNA, but not in RNA?
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