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Published on: 13/05/2022
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Questions + Answers key
Take MCQ Chemistry Test1.
Which one of the is not a surfactant?
CH3 -(CH2)15 -N+ -(CH3)2 CH2Br
CH3 -(CH2)15 -NH2
CH3 -(- CH2- )-16CH2 OSO2- Na+
OHC-(CH2)14 -CH2 -COO- Na+
2.
The most effective electrolyte for the coagulation of As2S3Sol is _______.
NaCl
Ba(NO3)2
K3[Fe(CN)6]
Al2(SO4)3
3.
Which one of the following is correctly matched?
Emulsion - Smoke
Gel - butter
foam - Mist
whipped cream - sol
4.
Hair cream is _____.
gel
emulsion
solid sol
sol.
5.
Statement : To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?
It is not true, ferric chloride is a poison.
It is true, Fe3+ ions coagulate blood which is a negatively charged sol
It is not true; ferric chloride is ionic and gets into the blood stream.
It is true, coagulation takes place because of formation of negatively charged sol with Cl-.
1.
(b)
CH3 -(CH2)15 -NH2
2.
As2S3 is a negatively charged colloid. It will be most effectively coagulated by the cation with greater valency. i.e., Al3+.
3.
(b)
Gel - butter
4.
Emulsion-Dispersed phase
Dispersion meduun -liquid
5.
(b)
It is true, Fe3+ ions coagulate blood which is a negatively charged sol
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