Chemistry 9 Chapter 5 MCQs Tests

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In this post, we have prepared 2 MCQs tests of Federal Board Chemistry 9 Chapter 5 MCQs Tests. For more Class 9 Chemistry MCQs Tests visit this page.

Practice MCQs Test No 1

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27

Class 9 Chemistry
Chapter 5
Practice MCQs Test No 1

1 / 10

Evaporation causes ___ effect ,due to this effect water is contained in the pitcher.

cooling

increase in weight

increase in density

heating

2 / 10

Sublimation is usually used to purify _ state of matter.

liquids

semiliquid

gases

solids

3 / 10

Water bubbles arising in the beaker provided with the temperature of 100 °C is an example of _.

compression

boiling

evaporation

distillation

4 / 10

Which of the following changes decrease the vapour pressure of water kept in a sealed vessel?

Decreasing the quantity of water

Decreasing the temperature of water

Decreasing the volume of the vessel to one-half

Adding salt to water

5 / 10

Liquids with weak intermolecular forces

cannot diffuse

contain a lot of kinetic energy

freeze easily

easily evaporate

6 / 10

As pressure decreases, boiling point _

decreases

increases

increases then decreases

decreases then increases

7 / 10

___ phase of physical states that can never be achieved in sublimation process.

gases

liquids

solids

semisolid

8 / 10

The boiling point of water is 100 °C, where internal vapour pressure becomes equal to atmospheric pressure. What is that atmospheric pressure?

all of the above

760 mm Hg

101.325 kpa

1 atm

9 / 10

By touch, glass imparts a hard appearance but microscopically atoms may be _ arranged.

regularly

irregularly

uniformly

three dimensionally

10 / 10

Melting points of amorphous solid will be in ___.

a single negative value of temperature

a single positive value of temperature

a particular range of temperature

definite temperature value

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Practice MCQs Test No 2

/10

10

Class 9 Chemistry
Chapter 5
Practice MCQs Test No 2

1 / 10

The particles in _ are always vibrating, but don't move past each other.

gases

solids

solids and liquids

liquid

2 / 10

Amount of vapour pressure of liquid decreases ___

Depth

At sea level

Above sea level

None of the above

3 / 10

Melting points of crystalline solids are _ due to strong intermolecular forces existing .

least

low

medium

sharp

4 / 10

____ is usually used to purify liquids.

condensation

distillation

evaporation

sublimation

5 / 10

Which figure has a repetitive pattern in its structure?

Both A and B

Fig B

Fig A

None of the above

6 / 10

If surface area of liquid is large then evaporation will be _.

moderate

large

small

minute

7 / 10

Identify the figure (a) and ( b)

( a ) amorphous ( b) crystaline

( a ) crystalline ( b) amorphous

Both are amorphous

Both are crystalline

8 / 10

A person living in hill stations observed that cooking food without using pressure cooker takes more time. The reason for this observation is that at high altitude_

Pressure remain constant

Pressure increases

Pressure decreases

Temperature increases

9 / 10

When the atmospheric pressure equals the equilibrium vapor pressure _ occurs.

melting

freezing

sublimation

boiling

10 / 10

Statement related to process of evaporation that is incorrect is _____.

evaporation occurs at any temperature

no bubbles are formed in the liquid during evaporation

evaporation takes place within the liquid

temperature may change during evaporation

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