Matter in Our Surroundings Class 9 MCQ. We covered all the Matter in Our Surroundings Class 9 MCQ in this post for free so that you can practice well for the exam.
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MCQ on Matter in Our Surroundings for Class 9 Students
Why is helium preferred over hydrogen for use in airships?
(a) Helium has a low density
(b) Helium has a high density
(c) Helium is chemically less reactive
(d) Helium is chemically more reactive
Option c – Helium is chemically less reactive
Which one of the following mixtures is homogeneous?
(a) Starch and sugar
(b) Methanol and water
(c) Graphite and charcoal
(d) Calcium carbonate and calcium bicarbonate
Option b – Methanol and water
A mixture of sulphur and carbon disulphide is
(a) heterogeneous and shows the Tyndall effect
(b) homogeneous and shows the Tyndall effect
(c) heterogeneous and does not show the Tyndall effect
(d) homogeneous and does not show the Tyndall effect
Option d – homogeneous and does not show the Tyndall effect
A student carefully observed the colloidal of starch in water, human blood, and cow milk. On the basis of observations, he made certain conclusions given below. Choose the wrong conclusion about the colloidal solution
(a) Translucent
(b) Components can be separated by ordinary filtration.
(c) Heterogenous and stable
(d) Show Tyndal effect
Option b – Components can be separated by ordinary filtration
Choose the incorrect statement about the true solution
(a) Its components can not be separated by filtration.
(b) It is opaque and unstable.
(c) Its particles can not be seen through the naked eye.
(d) It does not show the Tyndal effect.
Option b – It is opaque and unstable
Barium sulphate (BaSO4) dispersed in water used in diagnostic X-rays is a
(a) Colloid
(b) Solution
(c) Suspension
(d) Foam
Option c – Suspension
Non-reacting with each gas has a tendency to mix with others. This phenomenon is known as
(a) chemical reaction
(b) diffusion
(c) effusion
(d) explosion
Option c – effusion
Which has the least energetic molecules?
(a) Solids
(b) Liquids
(c) Gases
(d) Plasmas
Option a – Solids
The process used to separate oil and water is
(a) distillation
(b) sublimation
(c) separating funnel
(d) chromatography
Option c – separating funnel
Magnetism is most beneficial for separating
(a) gases and non-metallic liquids
(b) magnetic solids and solids such as sulfur
(c) non-metallic solids and solids such as sulfur
(d) non-magnetic solids from non-magnetic liquids
Water boiling in open fry pan represents which type of change?
(a) Physical and irreversible
(b) Chemical and irreversible
(c) Physical and reversible
(d) Chemical and reversible
Option a – Physical and irreversible
A chemical change is always accompanied by (i) the production of sound (ii) heat and light (iii) a change in mass (iv) a change in color
(a) (i) (ii) & (iii)
(b) (ii) & (iv)
(c) (i) only
(d) (i), (ii) & (iv)
Option d – (i), (ii) & (iv)
Who among the following is called ‘The father of modern chemistry’?
(a) Michael Faraday
(b) Lavoisier
(c) Proust
(d) Linus Pauling
Option b – Lavoisier
Which one among the following is not a mixture?
(a) Graphite
(b) Glass
(c) Brass
(d) Steel
Option a – Graphite
A mixture of ZnCl2 and PbCl₂ can be separated by
(a) distillation
(b) crystallization
(c) sublimation
(d) adding acetic acid
Option b – crystallization
The one, in which interparticle forces are strongest, is
(a) sodium chloride
(b) hydrogen
(c) ether
(d) carbon dioxide
Option a – sodium chloride
Which of the following is a compound?
(a) Stainless steel
(b) Brass
(c) Iron sulphide
(d) Diamond
Option c – Iron sulphide
Select the one that has a definite boiling point
(a) true solution
(b) compound
(c) colloid
(d) All of these
Option b – compound
Oil and water can form a stable dispersion with the help of a third substance commonly called
(a) emulsifier
(b) dispersant
(c) protective colloid
(d) None of these
Option a – emulsifier
Which one is a sublime substance?
(a) Table salt
(b) Sugar
(c) Iodine
(d) Potassium Iodide
Option c – Iodine
The process of changing the liquid state into a gaseous state at constant temperature is known as
(a) boiling
(b) melting
(c) fusion
(d) evaporation
Option a – boiling
Which one is a surface phenomenon?
(a) Evaporation
(b) Boiling
(c) Both (a) and (b)
(d) None of these
Option a – Evaporation
Select the correct order of evaporation for water, alcohol, petrol, and kerosene oil :
(a) water > alcohol > kerosene oil > petrol
(b) alcohol > petrol > water > kerosene oil
(c) petrol > alcohol > water > kerosene oil
(d) petrol > alcohol > kerosene oil > water.
Option d – petrol > alcohol > kerosene oil > water
Which of the following processes is known as fusion?
(a) Change of liquid to solid
(b) Change of solid to liquid
(c) Change of liquid to vapor
(d) Change of gaseous state to solid state
Option b – Change of solid to liquid
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