Tardigrade
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Tardigrade
Question
Chemistry
When phenol is heated with phthalic anhydride and H2SO4 , it produces
Q. When phenol is heated with phthalic anhydride and
H
2
S
O
4
, it produces
2174
180
NTA Abhyas
NTA Abhyas 2020
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A
Phenol red
0%
B
Methyl orange
0%
C
Salicylic acid
0%
D
Phenolphthalein
100%
Solution:
In the presence of conc.
H
2
S
O
4
, two molecules of phenol condense with phthalic anhydride to form phenolphthalein