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  1. Biochemical oxygen Demand ,(BOD) is a measure of organic material present in water
  2. The number of unpaired electron in Mn²⁺ is
  3. In TeCl₄, the central atom tellurium involves
  4. CrO₃ dissolves in aqueous NaOH to give
  5. AB crystallizes in a body centred cubic lattice with edge length ‘a’ equal