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Factors Affected by Hydrogen Bonding

Assertion:o-n...

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Assertion:o-nitrophenol is a weaker acid than p-nitrophenol. Reason: Intramolecular hydrogen bonding makes ortho isomer weaker than para isomer.

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Q. Assertion (A): P-Nitrophenol is stronger acid than O-nitrophenol.
Reason (R): Intramolecular hydrogen bonding makes ortho - isomer weaker acid than para - isomer.

Q. Assertion :p-Nitrophenol is a stronger acid than o-nitrophenol. Reason: Intramolecular hydrogen bonding makes the o-isomer weaker than the p-isomer

Q. Assertion :p- Nitrophenol is a stronger acid than o-nitrophenol. Reason: Intramolecular H-bond makes o-isomer weaker than p-isomer.

Q. Ortho-nitrophenol is steam volatile whereas para-nitrophenol is not. This is due to

1.

Intramolecular hydrogen bonding present in ortho-nitrophenol

2.

Intermolecular hydrogen bonding present in para-nitrophenol

3.

Intramolecular hydrogen bonding present in para-nitrophenol

4.

Inter-molecular hydrogen bonding present in ortho-nitrophenol.

Q. Assertion (A) : Ortho and para nitrophenols can be separated by steam distillation.
Reason (R) : Ortho nitrophenol exhibits intramolecular hydrogen bonding while para nitrophenol exists as associated molecules.

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Factors Affected by Hydrogen Bonding

Standard XII Chemistry

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