C
Q. Which among the following coal contains 90 per cent of carbon?
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Q. Aluminium salt commonly used to stop bleeding is
Q. The chemical name of laughing gas is
Q. Aluminium can be purified by
Q. Cobalt - 60 is commonly used in radiation therapy because it emits
Q. Name the Scientist who stated that matter can be converted into energy
Q. The boiling point of water decreases at higher altitudes is due to
Q. The metal that is usually extracted from sea water is
Q. Light scattering takes place in
Q. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
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