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{:("COLUMN-I","COLUMN-II"),((A)"Number o...

`{:("COLUMN-I","COLUMN-II"),((A)"Number of "p pi-dpi" type " pi " bondsin "SO_(2),(p)2),((B)"Number of "p pi-dpi" type "pi" bonds in "SO_(3),(q)1),((C )"Number of "p pi-dpi" type "pi" bonds in "H_(2)S_(2)O_(5),(r )4),((D) "Number of "p pi-dpi" type "pi " bonds in "H_(2)S_(2)O_(7) ,(s)3):}`

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The correct Answer is:
A-q; B-p; C-s; D-r

A) In `SO_(2)` one is `p pi-p pi`, one is `dpi-p pi`.
B) In `SO_(2)` one is ` p pi-p pi`, two are `d pi-d pi`.
C) 3
D) `H-O-underset(O) underset(||)overset(O)overset(||)S-O-underset(O)underset(||)overset(O)overset(||)S-O-H :. ` No of `p pi-d pi=4`
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{:("COLUMN-I","COLUMN-II"),("(Elements)","(Covalency)"),((A)'O' " atom in "O_(3),(p)1),((B)'S' " atom in hyposulphorous acid",(q)2),((C )'N'" atom in "NO^(+)and N_(2)O_(4),(r )3),((D)'N' " atom in "N_(3)H,(s) 4):}

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