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Arrange the following resonating structu...

Arrange the following resonating structures in order of increasing stability
`underset((I))(CH_(2)=overset(+)(N)=overset(-)(N))" "underset((II))(H_(2)overset(+)(C)=N=overset(-)(N))" "underset((III))(H_(2)overset(-)(C)-overset(+)(N) equiv N)" "underset((IV))(H_(2) overset(-)(C)-N=overset(+)(N))`

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The correct order of increasing stability is : `(I) gt (III) gt (II) gt (IV)`
`*" "`Structure `(I)` is maximum stable because conjugation is maintained.
`*" "`Structure `(IV)` is least stable because electronegative carbon atom has negative charge.
`*" "` Out of structures `(II)` and `(III)`, the structure `(III)` is more stable because of the presence of triple bond between the two nitrogen atoms.
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For hydrazoic acid, which of the following resonating structure well be least stable? underset("(I)")(H-N=overset(+)N=overset(-)N)harrunderset(" (II)")(H-overset(+)N-overset(+)N=N^(2-))harrunderset("(III)")(H-overset(-)N-overset(+)N-=N)

Arrange the following carbonium ions in order of decreasing stability : underset(I)underset()((CH_(3))_(3)overset(+)C)" "underset(II)underset()((CH_(3))_(2)overset(+)CH)" "underset(III)underset()(CH_(3)overset(+)CH_(2))" "underset(IV)underset()(overset(+)H_(3)C)

The correct stability order of the following resonance structures is (I)H_(2)C = overset(+)N = overset(-)N" "(II)H_(2)overset(+)C - N = overset(-)N (III)H_(2)overset(-)C - overset(+)N = N" "(IV)H_(2)overset(-)C - N = overset(+)N

Arrange the following resonating structures in the order of decreasing stability : (a) underset(("Vinyl chloride"))underset((I))(CH_(2)=CH-ddotunderset(..)CI: )harrunderset((II))( :overset(Theta)(CH_(2))-CH=overset(o+)underset(..)CI: )harrunderset((III))(overset(o+)CH_(2))-CH=underset(..)ddotCI^(Theta) b. underset(("Formic acid"))underset((IV))(H-overset(ddotO: )overset(||)C)-underset(..)ddotOH harrunderset((V))(H-overset( :ddotO:^(Theta))overset(|)(C)=underset(o+)ddotO)-H harrunderset((VI))(H-overset( :ddotO:^(Theta))overset(|)underset(o+)(C)-underset(..)ddotO-Hharr) underset((VII))(H-underset(ddotTheta)overset( overset(o+):O: )overset(|)C-underset(..)ddotO-H) ( c) Write the resonating structure of phenol in order of decreasing stability.

The decreasing order of stability of the following cations is underset(I)(CH_(3)overset(+)(C)H_(2)) , underset(II)(H_(2)C=overset(+)(C)H) , underset(III)(H-C-=overset(+)(C)) , underset(IV)(H_(3)C-overset(+)(C)=0)

For the given four structures , I to IV, which of the following is correct ? underset((I))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(3)H_(7)) underset((II))(CH_(3)-overset(O)overset(P)(C)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5)) underset((III))(CH_(3)-overset(O)overset(P)(C ) -overset(C_(2)H_(5))overset(|)(C ) H -C_(2)H_(5)) underset((IV))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5))

DINESH PUBLICATION-ORGANIC CHEMISTRY - SOME BASIC PRINCIPLES & TECHNIOUES-PURIFICATION & CHARACTERISATION OF ORGANIC COMPOUNDS
  1. Arrange the following resonating structures in order of increasing sta...

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  2. A misture of camphor and benzoic acid can be separated by :

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  3. In Kjeldahl's method, nitrogen is estimated as :

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  4. Two immiscible liquid present in a bottle can be separated by:

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  5. In sodium fusion test of organic compounds, the nitrogen in an organic...

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  6. Which of the following reagents is useful to separate benzoic acid fro...

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  7. In Duma's method, the gas collected in nitrometer is :

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  8. Anthracene is purified by :

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  9. 0.2 g of an organic compound on complete combustion produces 0.18 g of...

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  10. Which process is suitable for the purification of aniline ?

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  11. In the Lassaigne's test for the detection of sulphur, the purple colou...

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  12. For which of the following compounds will Lassaigne's test for nitroge...

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  13. The most satisfactory method to separate mixture of sugars is :

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  14. Lassaigne's extract is botted with dilute HNO(3) before testing for ha...

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  15. The purity of an organic solid is determined by :

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  16. Absolute alcohol is prepared by :

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  17. 0.32 g of an organic compound gave 0.233 g of BaSO(4). Determine the p...

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  18. Which is not used to purify organic solids ?

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  19. Chloroform and benzene form a pair of miscible liquids. These can be s...

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  20. During Lassaigne's test S and N present in an organic compound change ...

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  21. The best method to separate a mixture of ortho and para nitrophenol (1...

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