question_answer 63)

    Which of the following options are not in accordance with the property mentioned against them? (a)                Oxidising power (b)     Ionic character of metal halide (c)         Bond dissociation enthalpy                        (d) HI< HBr < HCI < HF     Hydrogen-halogen bond strength

Answer:

                    (b, c)  As ability to gain electron increases oxidising property increases. Here, F is the most electronegative element having highest value of SRP hence it has highest oxidising power.                                                                              This.is the incorrect order of ionic character of metal halide. Correct order can be written as                  As electronegativity difference between metal and halogen increases ionic character increases.                    This is incorrect order of bond dissociation energy. Correct order is  due to electronic repulsion among lone pairs in  molecule.