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Phenol when reacts with phthalic anhydrid in presence of H_{2}SO_{4} gives a compound which is used as the indicator in acid base titratic 

The product is :

Option: 1

Methyl Orange


Option: 2

Phenolphthalein


Option: 3

Erichrome-black T


Option: 4

Alizarin Yellow


Answers (1)

best_answer

As we learned

 

Effects of substituents on acidity of phenols -

1.  Electron withdrawing group like   -NO_{2},-CN,-X,-CHO

2.  Electron donating group like    -R,-OR,-NH_{2}

- wherein

1.  Increase the acidic strength of phenol.

2.  Decrease the acidic strength of phenol.

 

 

Phenolphthalein is the correct answer

Posted by

SANGALDEEP SINGH

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