Solved MCQs With Verified Answers (Unit-7: Properties of Matter ) Physics SSC - I (Class 9)

i. In which of the following state molecules do not leave their position?

(a) solid
(b) gas
(c) liquid
(d) plasma

... Answer is (a)  solid
-----

ii. Which of the substance is the lightest one?

(a) Aluminium
(b) Mercury
(c) Copper
(d) Lead

... Answer is (b)  mercury
-----

iii. SI Unit of pressure is Pascal, which is equal to

(a) 10^4 Nm^-2
(b) 1 Nm^-2
(c) 10^2 Nm^-2
(d) 10^3 Nm^-2

... Answer is (c) 10^2 Nm^-2
-----

iv. What should be the approximate length of the glass tube to construct a barometer?

(a) 0.5 m
(b) 1 m
(c) 2.5 m
(d) 11 m

... Answer is (d) 11 m
----

v. According to Archimedes up thrust is equal to

(a) weight of displaced liquid
(b) the volume of the displaced liquid
(c) mass of displaced liquid
(d) none of these

... Answer is (a) weight of the displaced liquid
-----

vi. The density of a substance can be found with the help of:

(a) Pascal's Law​
(b) Hook's Low
(c) Archimedes principle
(d) Principle of floatation

... Answer is (c) Archimedes' principle
-----

vii. According to Hook's Law :

(a) stress x strain = constant
(b) stress/strain = constant
(c) strain/stress = constant
(d) stress = strain

... Answer is (b) stress/strain = constant
-----

viii. The Following force-extension grapes of spring are drawn on the same scale. Answer the questions given below from (viii) to (x) viii. Which graph does not obey Hooke's Law?

(a)
(b)
(c)
(d)

... Answer is (c) 
-----

ix. Which graph gives the smallest value of the Spring constant?

(a)
(b)
(c)
(d)

... Answer is (d) 
-----

x. Which graph gives the largest value of the spring constant?

(a)
(b)
(c)
(d)

... Answer is (a) 
-----

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Unit-7: Properties of Matter

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