Chemistry 9 Chapter 5 MCQs Tests

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.

Chemistry 9 Chapter 5 MCQs Tests

Practice MCQs Test No 1

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Class 9 Chemistry
Chapter 5
Practice MCQs Test No 1

1 / 10

Melting points of amorphous solid will be in _____.

a particular range of temperature

definite temperature value

a single positive value of temperature

a single negative value of temperature

2 / 10

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

regularly

uniformly

irregularly

three dimensionally

3 / 10

As pressure decreases, boiling point ___

decreases then increases

increases

increases then decreases

decreases

4 / 10

Liquids with weak intermolecular forces

freeze easily

contain a lot of kinetic energy

cannot diffuse

easily evaporate

5 / 10

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

gases

solids

semisolid

liquids

6 / 10

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

760 mm Hg

all of the above

101.325 kpa

1 atm

7 / 10

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

distillation

evaporation

boiling

compression

8 / 10

Sublimation is usually used to purify _____ state of matter.

solids

semiliquid

liquids

gases

9 / 10

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

Decreasing the volume of the vessel to one-half

Adding salt to water

Decreasing the quantity of water

Decreasing the temperature of water

10 / 10

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

heating

cooling

increase in density

increase in weight

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Practice MCQs Test No 2

/10

212

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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

liquid

solids

solids and liquids

2 / 10

Which figure has a repetitive pattern in its structure?

None of the above

Fig A

Fig B

Both A and B

3 / 10

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

sublimation

freezing

melting

boiling

4 / 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 increases

Temperature increases

Pressure decreases

Pressure remain constant

5 / 10

Amount of vapour pressure of liquid decreases _______

At sea level

None of the above

Depth

Above sea level

6 / 10

________ is usually used to purify liquids.

sublimation

distillation

evaporation

condensation

7 / 10

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

evaporation takes place within the liquid

evaporation occurs at any temperature

temperature may change during evaporation

no bubbles are formed in the liquid during evaporation

8 / 10

Identify the figure (a) and ( b)

Both are crystalline

Both are amorphous

( a ) crystalline ( b) amorphous

( a ) amorphous ( b) crystaline

9 / 10

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

moderate

large

small

minute

10 / 10

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

low

medium

sharp

least

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