Liquids

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Unit – VII Liquids - PHYSICS

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Question 1

Pick the odd one from the following with respect to the properties of a liquid.

A	They have definite volume
B	Liquids are incompressible
C	They have their own shape
D	They have definite mass

Question 2

Every liquid exerts an upward force on the objects immersed in it. The upward force is called………….

A	Gravitational force
B	Buoyant force
C	Mechanical force
D	Magnetic force

Question 3

The upward thrust is equivalent to ……………..

A	hg
B	mg
C	pg
D	hp

Question 4

If the density of a liquid increases, the upthrust will…………

A	increase
B	Decrease
C	increases or decreases
D	Remain the same

Question 5

Buoyant force acting on an object is equal to the…………..

A	mass of the solid
B	Weight of the solid
C	Weight of liquid displaced by the object
D	Mass of the liquid displaced by the object

Question 6

…………… take the shape of the container.

A	solids
B	Liquids
C	Gases
D	None

Question 7

The pressure inside a liquid increases with ……………

A	mass
B	area
C	volume
D	depth

Question 8

…………. Is equal to the weight of the liquid displaced.

A	Buoyant force
B	Wt. of the solid
C	Gravitional force
D	Wt. of the liquid

Question 9

A bucket under water in a well is …………….

A	heavier
B	lighter
C	without change
D	twice as heavy

Question 10

Archimedes discovered

A	electricity
B	principle of moments
C	gravitational force
D	principle of lever

Question 11

The formula for pressure p=……………..

A	hg
B	ha
C	hdg
D	ahd

Question 12

Loss of Wt.in water=

A	Wt. of the immersed solid
B	Wt. of the displaced liquid
C	Zero
D	Wt. of the beaker

Question 13

An iron piece floats in mercury but sinks in water because of

A	greater density of mercury
B	greater density of water
C	greater density of iron
D	lesser density of iron

Question 14

…………. Is used to test the purity of milk.

A	Hydrometer
B	Lactometer
C	Test Tube Float
D	Measuring Jar

Question 15

The weight of the body in air is 20 N. Wt. in water is 16N what is its relative density

A	4
B	8
C	1.5
D	5

Question 16

A body floats when the upthrust is……….. the weight of the body

A	lesser than
B	greater than
C	equal to
D	half

Question 17

The principle used in hydrometer is………….

A	Law of floatation
B	Archimedes principle
C	Bovle’s law
D	Charles Law

Question 18

The ratio of density of the body to the density of water is …………..

A	Relative density
B	Buoyancy
C	Viscosity
D	Density of body

Question 19

When a body is immersed in a fluid, it experiences an apparent loss of

A	volume
B	pressure
C	weight
D	Matter

Question 20

A lactometer is a

A	test tube float
B	constant immersion hydrometer
C	variable immersion hydrometer
D	manometer

Question 21

…………. Has no unit.

A	Density
B	Relative Density

Question 22

……………. Is used to test the purity of milk.

A	Lactometer
B	Common hydrometer

Question 23

If the density of a liquid increases, the upthrust will………

A	increase
B	decrease

Question 24

Assertion (A) : Liquids are incompressible
Reason (R) : They show little change in volume even when large compressive forces are applied.

A	A is correct R is wrong
B	R is correct A is wrong
C	A is correct R does not explain A
D	R explains A

Question 25

Assertion (A) : when a body floats or immerses in a liquid, the upward force is called buoyant force
Reason (R) : Density has no limit

A	A is correct R is wrong
B	A is wrong R is correct
C	Both A and R are wrong
D	R explains A

Question 26

Assertion (A) : An iron piece floats in mercury but sinks in water
Reason (R) : The density of mercury is greater than the density of water.

A	A is correct R is wrong
B	R is correct A is wrong
C	R explains A
D	R does not explain A

Question 27

Assertion (A) : When a body is immersed in water, its weight in water is greater than its weight in air.
Reason (R) : Lactometer is used to test the purity of milk.

A	A is correct R is wrong
B	A is wrong R is correct
C	A is correct R explains A
D	Both A and R are wrong

Question 28

Assertion (A) : A common hydrometer is of variable immersion type
Reason (B) : Lactometer is of constant immersion type

A	A is correct R is wrong
B	R is correct A is wrong
C	R explains A
D	Both A and R are wrong

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Unit – VII Liquids - PHYSICS

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