Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Ionic Equilibrum question

2015 · Q101
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Ionic Equilibrum
  5. /2015 · Q101

Ionic Equilibrum question

2015 · Q101

NEETChemistryIonic EquilibrumMCQ+4 / −1
The Ksp of Ag2CrO4,  AgCl,  AgBr  and Agl  are respectively, 1.1 ×\times× 10−-−12, 1.8 ×\times× 10−-−10, 5.0 ×\times× 10−-−13, 8.3 ×\times× 10−-−17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, Nal and Na2CrO4?
  1. A
    AgBr
  2. B
    Ag2CrO4
  3. C
    Agl
  4. D
    AgCl
View written solutionFree

Correct answer: B

From the Ksp values of the given salts calculate the solubility values. Salt having highest solubility will precipitate at last.

.tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-nrix{text-align:center;vertical-align:middle}
AgCrO4⇌2Ag++CrO42-
s2ss


Ksp = (2s)2(s) = 1.1 × 10–12

$ \Rightarrow $ s = 0.65 × 10–4

.tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-nrix{text-align:center;vertical-align:middle}
AgCl⇌Ag++Cl-
sss


Ksp = s × s

$ \Rightarrow $ 1.8 × 10–10 = s 2

$ \Rightarrow $ s = 1.34 × 10–5

.tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-nrix{text-align:center;vertical-align:middle}
AgBr⇌Ag++Br-
sss


Ksp = s × s

$ \Rightarrow $ 5 × 10–13 = s2

$ \Rightarrow $ s = 0.71 × 10–6

.tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:0px;overflow:hidden;word-break:normal;border-top-width:1px;border-bottom-width:1px;border-color:black;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-nrix{text-align:center;vertical-align:middle}
AgI⇌Ag++I-
sss


Ksp = s × s

$ \Rightarrow $ 8.3 × 10–17 = s2

$ \Rightarrow $ s = 0.9 × 10–8

$ \therefore $ Solubility of Ag2CrO4 is maximum so, it will precipitate at last.
PreviousNext

More from Ionic Equilibrum

  • Which of the following salts will give highest pH in water?2014 · MCQ
  • Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M aqueous solution, lactic acid is 3.7% dissociates. The value of dissociation constant, Ka, for this acid will be2013 · MCQ
  • At 100oC the Kw of water is 55 times its value at 25oC. What will be the pH of neutral solution? (log 55 = 1.74)2013 · MCQ
  • The values of Ksp of CaCO3 and CaC2O4 are 4.7 × 10−9 and 1.3 × −9 respectively at 25oC. If the mixture of these two is washed with water, what is the concentration of Ca2+ ions in water ?2013 · MCQ
  • The dissociation constant of weak acid is 1 × 10−4. In order to prepare a buffer solution with a pH = 5, the [Salt]/[Acid] ratio should be2013 · MCQ
  • KMnO4 can be prepared from K2MnO4 as per the reaction, 3MnO42− + 2H2O ⇌ 2MnO4− + MnO2 + 4OH− The reaction can go to completion by removing OH− ions by adding2013 · MCQ
  • Which of these is least likely to act as a lewis base ?2013 · MCQ
  • Buffer solutions have constant acidity and alkalinity because2012 · MCQ