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Assertion : In acidic medium, phenolphth...

Assertion : In acidic medium, phenolphthalein has a benzenoid structure while in basic medium, it has quinoid structure.
Reason : Phenols donot react with phosphrous halids while alcohols do react.

A

If both assertion and reason are correct and reason is correct explanation for assertion.

B

If both assertion and reason are correct but reason is not correct explanation for assertion.

C

If assertion is correct but reason is incorrect.

D

If assertion and reason both are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
A
Reason is the correct explanation for assertion.
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DINESH PUBLICATION-ALCOHOLS AND PHENOLS-Assertion-Reason Type
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  2. Assertion : Order of reactivity of alcohols involving cleavage of O-H ...

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  4. Assertion : Solubility of alcohols in water decreases with the increas...

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  5. Assertion: o-and p-nitrophenol can be separated by steam distillation....

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  6. Assertion : Phenol is more reactive than benzene towards electrophilic...

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  7. Assertion : In bromine/water, phenol gives 2, 4, 6-tribromophenol whil...

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  8. Assertion : The dehydration of alcohols can be carried with conc. H(2)...

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  9. Assertion : In acidic medium, phenolphthalein has a benzenoid structur...

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  10. Assertion : In acidic medium, phenolphthalein has a benzenoid structur...

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  11. Assertion : Phenol is acidic in nature. Reason : Hydrid for phenate ...

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  12. Assertion : Ethyl alcohol and n-propyl alcohol cannot be distinguished...

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  13. Assertion : Hydroxylation of ethylene can be carried with Baeyer's rea...

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  14. Assertion : Picric acid is a strong acid inspite of the absence of the...

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  15. Assertion : Ease of dehydraction of alcohols follows the order : Terti...

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  16. Assertion : Grignard reagent produces a primary (1^(@)) alcohol with H...

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  17. Assertion : C(2)H(5)OH is a weaker acid than phenol but is a stronger ...

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  18. Assertion : Butan-2-ol and pentan-2-ol cannot by distinguished by iodo...

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  19. Assertion : Lucas reagent is a mixture of conc. HCl and anhydrous ZnCl...

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  20. Assertion: Benzenediazonium chloride on boiling with water gives pheno...

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