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NEET 2022
Exam
NEET
Year
2022
Subject
Chemistry
Chapter
Surface Chemistry

NEET 2022 · Chemistry · Surface Chemistry

Given below are two statements : Statement I : In the coagulation...

Given below are two statements :
Statement II :
In the coagulation of a negative sol, the flocculating power of the three given ions is in the order -
Al3+>Ba2+>Na+{Al}^{3 +} > {Ba}^{2 +} > {Na}^{+}
Statement IIII :
In the coagulation of a positive sol, the flocculating power of the three given salts is in the order -
NaCl>Na2SO4>Na3PO4NaCl > {Na}_{2}{SO}_{4} > {Na}_{3}{PO}_{4}
In the light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. ABoth Statement II and Statement IIII are incorrect.
  2. BStatement II is correct but Statement IIII is incorrect.
  3. CStatement II is incorrect but Statement IIII is correct.
  4. DBoth Statement II and Statement IIII are correct.

Correct answer

B. Statement II is correct but Statement IIII is incorrect.

Step-by-step solution

The flocculating power of an ion is directly proportional to its charge present. So flocculating power of

Al3+>Ba2+>Na+{Al}^{3 +} > {Ba}^{2 +} > {Na}^{+}

and similarly flocculating power of

PO43−>SO42−>Cl−{PO}_{4}^{3 -} > {SO}_{4}^{2 -} > {Cl}^{-}

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