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Assertion (A): Aqueous solution of ammon...

Assertion (A): Aqueous solution of ammonium acetate is neutral
Reason(R): Dissociation constants of `NH_(4),OH(K_(6))` and that of `CH_(3),COOH (K_(a))` are nearly equal.

A

both A & R are true, R is the corect explanation of A

B

both A &R are true, R is not correct explanation of A

C

A is true, R is false

D

A is false, R is true

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The correct Answer is:
A
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The dissolution of ammonia gas in water does not obey Henry's law. On dissolving. a major portion of ammonia molecules unite with H_(2),O to form NH_(4),OH molecules. A portion of the latter again dissociates into NH_(4)^(+) , and OH^(-) ions. In solution thercfore, we have NH_(3) , molecules, NH_(4),OH molecules and NH_(4)^(+) , ions and the following equilibrium exist: NH_(3(g)) (pressure P and concentration c) rarr NH_(3(l)) + H_(2),Orarr NH_(4),OH rarr NH_(4)^(+) rarr,+OH^(-) Let c_(1) ,mol/L of NH_(3) , pass in liquid state which on dissolution in water forms c_(2) mol/ L of NH_(4),OH. The solution contains c_(3) mol/L of NH_(4)^(+) , ions. Degree of dissociation of ammonium hydroxide is

The dissolution of ammonia gas in water does not obey Henry's law. On dissolving. a major portion of ammonia molecules unite with H_(2),O to form NH_(4),OH molecules. A portion of the latter again dissociates into NH_(4)^(+) , and OH^(-) ions. In solution thercfore, we have NH_(3) , molecules, NH_(4),OH molecules and NH_(4)^(+) , ions and the following equilibrium exist: NH_(3(g)) (pressure P and concentration c) rarr NH_(3(l)) + H_(2),Orarr NH_(4),OH rarr NH_(4)^(+) rarr,+OH^(-) Let c_(1) ,mol/L of NH_(3) , pass in liquid state which on dissolution in water forms c_(2) mol/ L of NH_(4),OH. The solution contains c_(3) mol/L of NH_(4)^(+) , ions. Total concentration of ammonia, which can be determined by volumetric analysis is equal to:

AAKASH SERIES-IONIC EQUILLIBRIUM-LECTURE SHEET ( EXERCISE-III) ( Straight Objective Type Questions)
  1. Few drops of HCI is addded to acetic acid buffer. The p^(H) is maintai...

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  2. Aqueous solution of KCI is neutral because

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  3. Assertion (A): Aqueous solution of ammonium acetate is neutral Reaso...

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  4. The nature of 0.1 M solution of sodium bisulphate is

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  5. The no.of hydroxyl ions produced by one molecule of Na(2),CO(3) , on h...

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  6. The nature of aqueous solution of CuSO(4), is

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  7. Aqucous solution of which of the following shows lower P^(H) ?

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  8. The pH of an aqueous solution of a salt is 10. The salt

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  9. Aqueous solution of potash alum is acidic due to the hydrolysis of

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  10. Dissociation of CH(3),COOH is supressed by adding

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  11. Which pair will show common ion effect ?

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  12. Equal volumes of the following solutions are mixed. Which form buffer ...

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  13. pH of (HCN + KCN) buffer can be inreased by .

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  14. Which one of the following is/are buffer solution(s)?

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  15. Which of the following do not show change in pH on dilution?

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  16. Which are acidic salts ?

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  17. A 0.1 M solution of weak acid HA is 1% dissociated at 25^(@)C To this ...

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  18. 0.15 mole of pyridinium chloride has been added into 500 cm^(3) of 0.2...

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  19. A certain buffer solution contains equal concentration of X^(-) and HX...

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  20. Certain weak acid has P^(ka) = 4. Find pH of 0.01M NaA(ag)

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