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The volume of 0.1 M NaOH will be require...

The volume of 0.1 M NaOH will be required to neutralise 100 ml of 0.1 ml `H_(3)PO_(4)` using methyl red indicator to change the colour from pink (acidic medium) to yellow (basic medium) is `10^(x)`. What is x?

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The correct Answer is:
2
Methyl red indicates first step ionisation of `H_(3)PO_(4)`
`H_(3)PO_(4)iffH^(+)+H_(2)PO_(4)^(-)`
`N_(1)V_(1)=N_(2)V_(2)implies0.1xx1xxV_(1)=0.1xx1xx100`
`V_(1)=100ml=10^(2)ml`
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