Question

Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol.

• A. $K _ { 4 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right]$
• B. $\mathrm { K } _ { 2 } \mathrm { CrO } _ { 4 }$
• C. KBr
• D. $\mathrm { K } _ { 2 } \mathrm { SO } _ { 4 }$

Answer 1

Answer: (C)

KBr

Answer 2

Sol KBr is least effective in causing flocculation of ferric hydroxide sol due to minimum charge at