Q.

List I (Property)                      List II(Order)    A) M.P                               1) I2 < Br2 < F2 < Cl2    B) B.P                                2) Cl > F > Br > I    C) Electron affinity            3) Cl2 > Br2 > F2 > I2    D) Bond dissociation        4) F2 > Cl2 > I2 > Br2           energy                        5) F2 < Cl2 < Br2 < I2    The correct match is

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a

A-5,B-5,C-2,D-3

b

A-2,B-5,C-3,D-4

c

A-1,B-2,C-3,D-4

d

A-5,B-2,C-3,D-4

answer is A.

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Detailed Solution

1.The melting points and the boiling points increase from fluorine to iodine due to increase in van der Waals forces. But volatile nature decreases down the group.2.Order of electron affinity of halogens is, Cl > F > Br > I.3.The decreasing order of bond energies of halogens is Cl2 > Br2 > F2 > I2.
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