57

 57. In which of the following, weakest hydrogen bonding is present ?

( 1 )     H 2 O                                                                                   ( 2 )     H F ( 3 )     H C l                                                                                     ( 4 )     H N O 3

Dear Student,

The correct answer is (3)
The order of strength of H-bond is F>O>N>Cl. 

Since Cl forms the weakest H-bond which is due to its greater size, so the answer is HCl.

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