CBSE Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in


Biology
Chemistry
Computer
English
Geography
History & Civics
Mathematics
Physics
Politics
Economics
Problem Solving Assessment(PSA)

Question-1 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-2
A substance in which all atoms are alike is called an

(A) compound	(B) mixture
(C) element	(D) atoms

Question-3 Air is regarded as a mixture because

(A) its pressure may vary	(B)its temperature may change
(C)its volume changes under different conditions	(D)its composition may vary

Question-4
Uniform composition is for

(A) Homogeneous mixture	(B) Heterogeneous mixture
(C) Colloids	(D) Suspensions

Question-5
The diameter of particles of a solution is smaller than

(A) 1nm	(B) 5nm
(C) 8nm	(D) 10nm

Question-6
Immiscible liquids separate out in layers depending on their densities.The principle of this is

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

Question-7
Homogeneous and heterogeneous classification is for

(A) Elements	(B) Compounds
(C) Mixtures	(D) Salt

Question-8
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-9 Which of the following is not a mixture?

(A) Pure water	(B)Sea water
(C)Air	(D)Brass

Question-10
When no more solute can be dissolved in a solution at a given temperature, the solution is called

(A) Concentrated	(B) Saturated
(C) Dilute	(D) Super saturated

Click here to see your answersheet and detailed track records.

Std 9

CBSE

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