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pH at which a basic indicator with K("in...

pH at which a basic indicator with `K_("in")=1xx10^(-10)` changes colour when the indicator is `xx10^(-2)M` is

A

8

B

4

C

2

D

10

Text Solution

Verified by Experts

The correct Answer is:
B
`pOH =pK_("in")("basic")=-log 10^(-10)=10`
`pH =14-pOH =14-10=4`
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DINESH PUBLICATION-IONIC EQUILIBRIUM -MULTIPLE CHOICE QUESTIONS
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  2. pH at which an acidic indicator with K("in")=1xx10^(-5) changes colour...

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  3. pH at which a basic indicator with K("in")=1xx10^(-10) changes colour ...

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  4. A weak base, B, has basicity constant K(b)=2xx10^(-5). The pH of any s...

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  6. 100mL of pH =6 solution is diluted to 100mL by water. pH of the soluti...

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  8. BOH is a weak base, molar concentration of BOH that provides a [OH]^(-...

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  9. Which of the following solution will have pH of 4.74

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  10. Which of the following mixtures will act as a buffer solution when dis...

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  11. For the reaction S(2)O(3)^(2-)(aq) +2H(3)O^(+)(aq) hArr S(s)+H(2)SO(...

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  12. Both HCOOH and CH(3)COOH solutions have equal pH. If K(1) // K(2) ( r...

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  13. pH of Ca(OH)(2) solution is 12. Millimoles of Ca(OH)(2) present in 100...

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  14. A buffer solution contains 100mL of 0.01 M CH(3)COOH and 200mL of 0.02...

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  15. Assuming 100% ionization in case of strong electrolytes which of the f...

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  16. To prepare a buffer of pH 8.26, amount of (NH(4))(2)SO(4) to be added ...

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  17. Percentange ionisation of weak acid can be calculated using the formul...

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  18. pH of a mixture of 1 M benzoic acid (pK(a)=4.20) and 1 M C(6)H(5)COONa...

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  19. If the freezing point of 0.1 M HA(aq) solution is -0.2046^(@)C then pH...

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  20. If the equilibrium constant for the reaction of weak acid HA with stro...

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