AIEEE 2005 | Surface Chemistry Question 112 | Chemistry

The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively, which of the following statements is NOT correct?

magnesium chloride solution coagulates, the gold sol more readily than the iron (III) hydroxide sol.

sodium sulphate solution causes coagulation in both sols

mixing the sols has no effect

coagulation in both sols can be brought about by electrophoresis

AIEEE 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which one of the following characteristics is not correct for physical adsorption?

Adsorption increases with increase in temperature

Adsorption is spontaneous

Both enthalpy and entropy of adsorption are negative

Adsorption on solids is reversible

AIEEE 2002

MCQ (Single Correct Answer)

-1

Out of Syllabus

The formation of gas at the surface of tungsten due to adsorption is the reaction of order :

insufficient data

AIEEE 2002

MCQ (Single Correct Answer)

-1

Out of Syllabus

Alum helps in purifying water by :

forming Si complex with clay particles

sulphate part which combines with the dirt and removes it

coagulating the mud particles

making mud water soluble

Questions Asked from Surface Chemistry (MCQ (Single Correct Answer))

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