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Statement-1: In the coagulation of negat...

Statement-1: In the coagulation of negatively charged arsenic sulphide sol, the coagulating power decreases in the order, `Al^3gtBa^(2+)gtNa^+`
Statement-2 : Generally greater the valence of coagulating ion, the greater is its power of coagulation.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1

B

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1

C

Statement-1 is True, Statement-2 is False.

D

Statement-1 is False, Statement-2 is True.

Text Solution

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The correct Answer is:
A
Coagulating power `prop` charge on coagulation ion
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Statement- 1: In the coagulation of negatively charged arsenic sulphide sol, the coagulating power decreases in the order Al^(3+) gt Ba^(2+) gt Na^(+) . Statement- 2: Generally greater the valency of coagulating ion, the greater is its power of coagulation.

Assertion : In the coagulation of a negative sol the flocculating power is in the order : Al^(3+) gt Ba^(2+) gt Na^(+) Reason : Greater the valence of the flocculating ion added, greater is its power to cause precipitation.

Greater the flocculation value of an electrolyte, greater is its coagulating power.

For the coagulation of a negative sol, the species below, that has the highest flocculating power is :

"The grater the charge on an ion, the grater its coagulating power" is a statement of

The coagulating power of ions, for a negative sol changes in the order

Assertion (A) Coagulation power of Al^(3+) is more than Na^(+) . Reason (R) Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy-Schulze rule) .

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