Identify the incorrect statement about halogens. 1. F2 is the best oxidant & non metal with highest S.R.P value 2. The only halogen that oxidises water is Cl2 3. The halogen that occurs in liquid state at 25degree Celsius is Br2 4. Among all halogens I2 having strong Vander waals forces among its molecules.

Select the correct statement about van der Waal's constant 'b' 1. It is excluded volume 2.Its unit is mol "litre"^(-1) 3. It depends on intermolecular force 4. Its value depends on molecular size

Statement -1 Fluorine does not show oxidation number greater than zero. Statement 2: The halogens chlorine, bromine and iodine can show positive oxidation states of +1, +3, +5 and +7.

Which of the statement is/are true about the reactivity of halogenation of alkanes ? The reactivity ordar is F_(2) gt C1_(2) gt Br_(2) gt I_(2) . I. Lower the activation energy for the chain initiation step, more reactive is the halogen. II. Lower the activation energy for the first chain propagation step, more reactive is the halogen. III. More negative is the overall heat of the reaction (Delta H_(r)^(@)) of halogenation ofg alkane, more reactive is the halogen. IV. Lower the activation energy for the second chain-propagation step, more reactives is the halogen.