A)
Base Acid End point Weak Strong Yellow to pinkish red
B)
Base Acid End point Strong Strong Pink to colourless
C)
Base Acid End point Weak Strong Colourless to pink
D)
Base Acid End point Strong Strong Pinkish red to yellow
Correct Answer: A
Solution :
Acid added in alkali so colour of methyl orange changes from yellow to pinkish red. Working \[\text{pH}\]range of \[\text{MeOH}\to \text{3}\text{.1 to 4}\text{.3}\]
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