Q. Which of the following pollutants is main product of automobile exhaust ?
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Q. Aluminium perchlorate is used in
Q. All isotopes of the same element have
Q. The most important ore of aluminium is
Q. Acetyl salicyclic acid is commonly used as
Q. Wavelength of X - rays is of the order of
Q. In which of the following activities silicon carbide is used?
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