1.

At ordinary temperature and pressure, among halogens, chlorine is gas, bromine is a liquid, and iodine is a solid, because

Answer»

The order of stabiity `= I_(2) gt Br_(2) gt Cl_(2)`
The order of DENSITY `= I_(2) gt Br_(2) gt Cl_(2)`
The order of specific heat `= Cl_(2) gt Br_(2) gt I_(2)`
The order of intermolecular forces `= Cl_(2) lt Br_(2) lt I_(2)`

Solution :Density `prop` Mass thus `I_(2) gt Br_(2) gtCl_(2)`
(C ) BOND energydecreases thus specific heat (or) amount at NEAR required decreases down the group `Cl_(2) gt Br_(2) gt I_(2)` , order of intermolcular force `I_(2) gt Br_(2) gt Cl_(2)`


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