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Which of the following pairs consitutes ...

Which of the following pairs consitutes buffer?

A

`HNO_(3)andNH_(4)`

B

HCl and KCl

C

`HNO_(2)andNaNO_(2)`

D

NaOH and NaCl

Text Solution

Verified by Experts

The correct Answer is:
C
The mixture containing a weak acid `(HNO_(2))` and its conjugate base `(NO_(2)^(-))` acts as acidic buffer.
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NARAYNA-ACIDS & BASES-EXERCISE-III
  1. At 25^(@)C, the dissociation constant of a base. BOH is 1.0xx10^(-12)...

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  2. H(2)S gas when passed through a solution of cations containing HCl pre...

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  3. Which of the following pairs consitutes buffer?

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  4. The hydrogen ion concentration of a 10^(-8) M HCl aqueous soultion at ...

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  5. Calculate the pOH of solution at 25^(@)C that contains 1xx10^(-10) M o...

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  6. A monoprotic acid in 0.1 M solution has K(a)=1.0xx10^(-5). The degree...

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  7. Equimolar solution of the following were prepared in water separately....

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  8. Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a ...

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  9. The dissociation equilibrium of a gas AB, can be represented as The d...

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  10. The values of K(p(1)) and K(p(2)) for the reactions X hArr Y+Z ….(i...

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  11. Which of the following molecules acts as a Lewis acid?

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  12. What is the [OH]^(-) in the final solution prepared by mixing 20.0mL o...

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  13. The ionization constant of ammonium hydroxide is 1.77xx10^(-5) at 298 ...

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  14. The dissociation constants for acetic acid and HCN at 25^(@)C are 1.5x...

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  15. Which of the following molecular hydride act as a Lewis acid ?

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  16. Which of the following describes correct sequence for decreasing Lewis...

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  17. What is [H^(+)] in mol//L of a solution that is 0.20 M in CH(3)COONa a...

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  18. In a buffer solution containing equal concentration of B^(-) and HB, t...

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  19. A buffer solution is prepared in which the concentration of NH(3) is 0...

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  20. Which of the following is least likely to behave as Lew is acid?

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