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Q4: Which one of the following could be
Q10: The ionization energy of O<sub>2</sub><sub> </sub>is 1205
Q12: The most stable allotrope of oxygen is
Q17: An example of a form of pure
Q25: The partial pressure of a component in
Q31: Of the following, only _ is not
Q92: What compound in limestone and marble is
Q116: In radioactive dating the ratio of carbon-
Q140: The two allotropic forms of phosphorus are
Q147: Which pair of elements is most apt