# Liquids

## 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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There are 28 questions to complete.

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