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In the structure of HNO(3), why is N-O b...

In the structure of `HNO_(3)`, why is N-O bond (121 pm) shorter than N-OH bond (140 pm) ?

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This is attributed to resonance which is exhibited by the acid

The N-O bond has a partial double character while the N-OH bond is a single bond in both the contributing structures. Therefore N-OH bond length is more as compared to N-O bond length.
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Which of the following statement are true . (i) In the structure of HNO_3 , the N- O bond (121 pm) is shorter than the N-ON bond (140pm) . (ii) All the P - Cl bonds in PCl_5 are not equivalent . (iii) I - Cl is more reactive than I_2 .

Explain the following situations : (i) In the structure of HNO_(3) molecule , the N-O bond (121 pm) is shorter than N-OH bond (140pm). (ii) SF_(4) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (iii) XeF_(2) has a straight linear structure and not a bent angular structure.

Account for the following : (i) NH_(3) is a stronger base than PH_(3) (ii) Sulphur has a greater tendency for catention than oxygen. (iii) Bond dissociation energy of F_(2) is less than that of Cl_(2) . (OR) Explain the following situations : (i) In the structure of HNO_(3) moleucle, the N-O bond (121 pm) is shorter than the N-OH bond (140 pm). (ii) SF_(4) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (iii) XeF_(2) has a straight linear structure and not a bent angular structure.

(a) Write the resonance structure of RCOOH . (b) Why is (C-O) bond shorter in RCOOH than in ROH ( c) Compare the (C=O) bond length in RCOOH and RCHO . (d) Compare the reactivities of (C=O) in RCOOH and RCHO towards nucleophilic addition (N.A.) reactions.

Give reason for : (i) SF_6 is kinetically an inert substance. (ii) The N - O bond in N0_(2)^- is shorter than the N - O bond in NO_(3)^- .

DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Questions From Board Examinations
  1. Sulphur vapours exhibit some paramagnetic behaviour. Explain.

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  2. Complete the following chemical equations : (i) P(4) (s) +NaOH (aq) ...

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  3. In the structure of HNO(3), why is N-O bond (121 pm) shorter than N-OH...

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  4. XeF(2) has linear structure and not a bent structure , Given reason .

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  9. Give the decreasing order of dipole moments of HF,HCI,HBr, and HI.

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  10. (a) Why does NO2 dimerise ? (b) In what way can it be proved that PH...

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  11. Red phosphorus is ...............reactive than white phosphorus as red...

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  18. Why does H(3)PO(3) act as a reducing agent but H(3)PO(4) does not ?

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  19. (a) Write the balanced chemical equation for the reaction of Cl(2) wit...

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