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An acid type indicator, H In differs in ...

An acid type indicator, H In differs in colour from its conjugate base `(In^(-))` . The human eye is sensitive to colour differences only when the ratio `[In^(-)]//[H In]` is greater than 10 or smaller than `0.1`. What should to observe a complete colour change ? `(K_(a)= 1.0xx10^(-5))`

A

4

B

2

C

6

D

1

Text Solution

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The correct Answer is:
B
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