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Problem Solving Assessment(PSA)

Question-1
Shaving cream is an example of

(A) Aerosol	(B) Foam
(C) Emulsion	(D) Sol

Question-2 The process of separation of insoluble solids from a liquid is called :

(A) Filtration	(B)Decantation
(C)Crystallisation	(D)Evaporation

Question-3 Which of the following statements is true about compounds?

(A) Compound is homogeneous and have a fixed composition	(B)Compound is heterogeneous and have a fixed composition
(C)Compound is heterogeneous	(D)Compounds is heterogeneous and has no fixed composition.

Question-4
The size of the colloidal particle is in the range of

(A) 1 Å to 100 Å	(B) 1nm to 100 nm
(C) 10^-9 m to 10^-7 m	(D) 10^-9cm to 10^-7cm

Question-5 The process used to separate oil and water is

(A) Distillation	(B)Sublimation
(C)Separating funnel	(D)Chromatography

Question-6
The amount of solute present in a given amount of solution is called its

(A) Density	(B) Concentration
(C) Mass	(D) Fluidity

Question-7
The technique is used in washing machines to squeeze out water from wet clothes.

(A) Separating funnel	(B) Centrifugation
(C) Evaporation	(D) Condensation

Question-8
A homogeneous mixture of two or more substances is called

(A) Solvent	(B) Solute
(C) Solution	(D) Soil

Question-9
A heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium is called

(A) Saturated solution	(B) Unsaturated solution
(C) Suspension	(D) Supersaturated solution

Question-10
Mist is an example of

(A) Solid sol	(B) Foam
(C) Gel	(D) Aerosol

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Std 9

CBSE

Practice in Related Chapters
Matter In Our Surroundings
Is Matter Around Us Pure
Atoms And Molecules
Structure Of The Atom