State reasons for each of the following: (i) The N–O bond in NO2– is shorter than the N–O bond in NO3– .

Monjur Alahi

State reasons for each of the following:
(i) The N–O bond in NO2– is shorter than the N–O bond in NO3– .

(ii) SF6 is kinetically an inert substance.


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Salim Ahmed Kawsar

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(i) This is because the N—O bond in NO2– is an average of a single bond and a double bond whereas the N—O bond in NO3– is an average of two single bonds and a double bond.

(ii) In SF6, S atom is sterically protected by six F atoms and does not allow water molecules to attack the S atom. Further, F does not have d-orbitals to accept the electrons denoted by H2O molecules. Due to these reasons, SF6 is kinetically an inert substance.

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