Q100 · CSIR NET Chemistry, June 2016
Paper: CSIR NET June 2016 · Subject: Physical Chemistry · Chapter: Surface Chemistry · Topic: Colloids Micelles · Marks: 2 · Difficulty: Medium
When river water containing colloidal clay flows into the sea, the major cause of silting is
(a)accumulation of sand at the bottom
(b)flocculation and coagulation
(c)decreased salinity of sea water
(d)micellization
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
The electrolytes of sea water neutralise the charge on the clay colloid, causing flocculation/coagulation and deposition of silt (deltas).
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