Surface Chemistry
Which of the following electrolytes will have maximum coagulating value for $$AgI/Ag^+$$ sol?
DoubtBuddy
Single Choice
The dispersed phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged respectively. Which of the following statements is not correct?
AMagnesium chloride solution coagulates gold sol readily than iron (III) hydroxide sol.
BSodium sulphate solution causes coagulation in both sols.
CMixing of the two sols has no effect.
Correct Answer
DCoagulation in both sols can be brought about by electrophoresis.
Solution
When excess of an electrolyte is added, the colloidal particles are precipitated. The reason is that colloids interact with ions carrying charge opposite to that present on themselves. This causes neutralisation leading to their coagulation. The ion responsible for neutralisation of charge on the particles is called the coagulating ion. A negative ion causes the precipitation of positively charged sol and vice versa. Hence, option C which stating there is no effect is the wrong statement and hence is the correct answer.
SIMILAR QUESTIONS
Surface Chemistry
How can a lyophilic sol be coagulated?
Surface Chemistry
Alums purify muddy water by :
Surface Chemistry
The coagulation of sol particles may be brought about by:
Surface Chemistry
The ability of an ion to bring about coagulation of given colloid depends upon
Surface Chemistry
Equal volume each of two sols of $$AgI$$, one obtained by adding $$AgNO_3 $$ to slight excess of $$KI$$ and another obtained by adding $$KI$$ to slight excess of $$AgNO_3$$ are mixed together . Then :
Surface Chemistry
Which of the following electrolytes will have maximum coagulating value for $$AgI/Ag^+$$ sol?
Surface Chemistry
The clouds consists of charged particles of water dispersed in air. Some of them are positively charged, others are negatively charged. When positively charged clouds come closer, they cause lightening and thundering whereas when positive and negative charged colloids come closer, they cause heavy rain by aggregation of minute particles. It is possible to cause artificial rain by throwing electrified sand or silver iodide from an aeroplane and thus, coagulation the mist hanging in air. AgI helps in artificial rain because :
Surface Chemistry
Alum helps in purifying water by
Contact Details
- community@doubtbuddy.in
- M3M Cosmopolitian, Sector 66, Golf Course Extension Road, Gurgaon
- Policy Terms