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Problem Solving Assessment(PSA)

Question-1
Raghav added dilute HCl to granulated zinc in a test tube. The observation made is :

(A) the surface of the metal turns shining	(B) the reaction mixture turns milky
(C) greenish yellow gas is evolved	(D) a colourless and odour less gas evolves with bubbles

Question-2
Pure form of matter is known as

(A) Substance	(B) Compound
(C) Mixture	(D) Complex

Question-3 When iron and sulphur are heated at high temperature

(A) Black coloured FeS is formed	(B)Mixture of iron and sulphur is obtained
(C)Yellow coloured iron sulphide is formed	(D)They do not heat

Question-4
The change in the interconversion of the states of matter is

(A) Physical	(B) Chemical
(C) Permanent	(D) Irreversible

Question-5
It has variable composition.

(A) Element	(B) Mixture
(C) Solution	(D) Compound

Question-6
Milk of magnesia is am example of

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

Question-7
Mud is an example of

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

Question-8 The Brownian movement in colloids is due to :

(A) Tyndall effect	(B)Charge on colloidal solution
(C)Collisions between colloidal particles and with dispersion medium	(D)All of these

Question-9
We will observe a precipitation to occur in the solution when :

(A) barium chloride is added to sodium chloride	(B) barium chloride is added to sodium sulphate
(C) sodium sulphate is added to sodium chloride	(D) sodium sulphate is added to barium sulphate

Question-10
The component of the solution that dissolves the other component in it is called

(A) solution	(B) solute
(C) solvent	(D) ore

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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