COMEDK Exam 2018 Solved Paper

Flocculation value ∝‌

1

‌ Coagulating power ‌

Fe(OH) is a positively charged sol.
For coagulating Fe(OH)3 negatively charged electrolyte is used and greater the value of -ve charge, coagulating power will be strong. Among given electrolyte, NaCl has lowest coagulating power. Hence, its flocculation value will be maximum.