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Which one of the following arrangements does not give the correct picture of the trends indicated against it ?(i) F2 > Cl2 > Br2 > I2 : Oxidizing power(ii) F2 > Cl2 > Br2 > I2 : Electron gain enthalpy(iii) F2 > Cl2 > Br2 > I2 : Bond dissociation energy(iv) F2 > Cl2 > Br2 > I2 : Electronegativity.(a) (ii) and (iv) (b) (i) and (iii)(c) (ii) and (iii) (d) (ii), (iii) and (iv) |
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Answer» (c) From the given options we find option (a) is correct. The oxidising power of halogens follow the order F2 > Cl2 > Br2 > I2 . Option (b) is incorrect because it in not the correct order of electron gain enthalpy of halogens. The correct order is Cl2 > F2 > Br2 > I2 . The low value of F2 than Cl2 is due to its small size. Option (c) is incorrect. The correct order of bond dissociation energies of halogens is Cl2 > Br2 > F2 > I2 . Option (d) is correct. It is the correct order of electronegativity values of halogens. Thus option (b) and (c) are incorrect |
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