CORRECT-INCORRECT STATEMENT \( S_{1} \) : In the acid-base titration involving strong base and w...

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CORRECT-INCORRECT STATEMENT
\( S_{1} \) : In the acid-base titration involving strong base and weak acid, methyl red can be used as an indicator.
\( \mathbf{S}_{2} \) : Methyl red changes its colour in the \( \mathrm{pH} \) range 4.2 to 6.3 .
\( \mathrm{S}_{3} \) : In a titration of weak acid with strong base, the \( \mathrm{pH} \) at the half equivalence point is \( \mathrm{pK}_{\mathrm{a}} \).
(1) F T F
(2) \( \mathrm{T} \mathrm{F} \mathrm{T} \)
(3) F T T
(4) \( \mathrm{T} \mathrm{T} \mathrm{T} \)
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