Explain the following situations :
(i) In the structure of molecule, the N-O bond (121 pm) is shorter than N-Oh bond (140 pm).
(ii) is easily hydrolysed whereas is not easily hydrolysed.
(iii) has a straight linear structure and not a bent angular structure.
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(i) In the structure the bond length of N-O is shorter due to formation of coordinate bond and double bond while in N-OH the bond is single covalent due to which its bond length is greater than other N-O bond.
(ii) In , due to less steric hindrance by four F atoms, molecules can attack easily while in the S atom is completely protected by six F atoms and does not allow molecules to attack the S atom.
(iii) In there are 2 bond pairs and 3 lone pairs and thus show hybridization. It has linear geometry.