NH4Cl is acidic due to from Chemistry Equilibrium

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 Multiple Choice QuestionsMultiple Choice Questions

101.

The pH of a 0.1 M solution of NH4OH (having Kb =1.0 x 10-5) is equal to

  • 10

  • 6

  • 11

  • 12


102.

Which of the following salts will not undergo hydrolysis?

  • NH4Cl

  • KCN

  • KNO3

  • Na2CO3


103.

The heat of neutralisation of a strong acid and a strong alkali is 57.0 kJ mol-1.The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is 

  • 57.0 kJ

  • 11.4 kJ

  • 28.5 kJ

  • 34.9 kJ


104.

Ammonium acetate which is 0.01 M, is hydrolysed to 0.001 M concentration. Calculate the change in pH in 0.001 M solution, if initially pH = pKa

  • 5

  • 10

  • 100

  • 1


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105.

The solubility product of Ag2CrO4 is 32 × 10-12. What is the concentration of CrO42- ions in that solution?

  • 2 × 10-4

  • 16 × 10-4

  • 8 × 10-4

  • 12× 10-4


106.

Conjugate acid-base pair differ by

  • electron

  • proton

  • neutron

  • hydroxyl group


107.

Which is not an example of common ion effect?

  • NaCl+ AgCl

  • H2S+ HCl

  • CH3COOH+ NaOH

  • NH4OH+ NH4Cl


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108.

NH4Cl is acidic due to

  • cationic hydrolysis

  • anionic hydrolysis

  • its ionic nature

  • pH > 7


A.

cationic hydrolysis

     NH4Cl + H2O → NH4OH + HCl

or, NH4+ + Cl- + H2O → NH4OH + H+ + Cl-

or, NH4+Cation + H2O → NH4OH + H+

Due to the presence of H+, after cationic hydrolysis in the solution, the solution of NH4Cl is acidic.


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109.

An acid solution of pH = 6 is diluted 1000 times, the pH of the final solution becomes

  • 6.01

  • 9

  • 3.5

  • 6.99


110.

The conjugate acid of HS- is

  • S2-

  • H2S

  • Both (a) and (b)

  • None of these


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