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Chemistry Chemistry Difficulty: Medium

The depletion of Ozone layer is mainly due to

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Periodic table provides a basic framework to study elements with respect to their__________________? Which one of the following is used as preservative for foodstuff? A drug that is antipyretic as well as analgesic is The atomic radii decreases by increasing atomic number in________________? Which type of bond is formed by overlap of p orbitals _______________?