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Q.

 List I (Property) List II(Order)
A)M.Pi)I2<Br2<F2<Cl2
B)B.Pii)Cl>F>Br>I
C)Electron affinityiii)Cl2>Br2>F2>I2
D)Bond dissociation energyiv)F2>Cl2>I2>Br2
  v)F2<Cl2<Br2<I2
 (A)(B)(C)(D)
1)vviiiii
2)iiviiiiv
3)iiiiiiiv
4)viiiiiiv

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a

1

b

2

c

3

d

4

answer is A.

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Detailed Solution

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  • The M.P's and the B.P's increase from fluorine to iodine due to increase in van der Waals forces. But volatile nature decreases down the group.
  • Order of electron affinity of halogens is, Cl > F > Br > I.
  • The decreasing order of bond energies of halogens is Cl2 > Br2 > F2 > I2.
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