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  1. Equivalent conductances of Ba²⁺ and Cl⁻ ions are 127 and 76 ohm⁻¹ cm⁻¹ eq⁻¹
  2. Permanent hardness of water is due to the presence of
  3. Elements of which of the following groups will form anions most readily ?
  4. In a cubic cell,the contribution of an atom at a face of the unit cell is
  5. The secondary precursors of photochemical smog are