9th Class Chemistry chapter 5 Physical States of Matter MCQs and Solved Exercise Notes

9th Class Chemistry Chapter 5 Physical States of Matter Notes, MCQs, Solved Exercise 

Are you looking for Sindh Board Class 9 Chemistry MCQs and notes? If yes, then you are at the right place. 

Here candidates will get the 9th class Chemistry chapter 5 "Physical States of Matter" MCQs solved textbook exercise and PDF notes.

These notes will cover 9th Class Chemistry Textbook exercise MCQs and Question Answers for the Sindh Board.

9th Class Chemistry Chapter 5 Physical States of Matter MCQs with Answers

Those students who are preparing for board exams, they can study 9th Class Chemistry Chapter 5 Physical States of Matter MCQs with Answers from here.

01. Which of the following gas diffuses fastest?

(a) Hydrogen ✓

(b) Helium

(c) Fluorine

(d) Chlorine

02. The vapor pressure of a liquid increases with the:

(a) increase of pressure

(b) increase of temperature ✓

(c) increase of intermolecular forces

(d) increase the polarity of molecules

03. The freezing point depends upon:

(a) Nature of liquid

(b) Pressure

(c) Temperature ✓

(d) Volume

04. One atmospheric pressure is equal to:

(a) 10325 Pascal

(b) 106075 Pascal

(c) 10523 Pascal

(d) 101325 Pascal ✓

05. Which of the following does not affect the boiling point:

(a) Intermolecular forces

(b) External pressure

(c) Initial temperature of liquid ✓

(d) Nature of liquid

06. The mobility of liquids is lesser than:

(a) Solids

(b) Gases ✓

(c) Plasma

(d) Bose-Einstein Condensate

07. Which of the following have a sharp melting point in solids:

(a) Plastic

(b) Rubber

(c) Glass

(d) Diamond ✓

08. Which of the following is the lightest form of matter:

(a) Solid

(b) Liquid

(c) Gases ✓

(d) Plasma

09. The liquid molecules leave the surface of the liquid in the evaporation process because:

(a) Energy is low

(b) Energy is moderate

(c) Energy is high ✓

(d) None of these

10. The density of gases increases when it:

(a) Pressure increased ✓

(b) Temperature increased

(c) Volume increased

(d) None of these

11. How many times liquids are denser than gases? 

(a) 1,000 times ✓

(b) 100 times

(c) 10,000 times

(d) None of these

12. Gases are the lightest form of matter and their densities are expressed in terms of: 

(a) mg/cm³ 

(b) g/cm³

(c) g/dm³ ✓

(d) kg/dm³

13. At the freezing point one of the following coexists in dynamic equilibrium 

(a) Gas and Solid

(b) Liquid and Gas 

(c) Liquid and Solid ✓

(d) All of these

14. Gases exert pressure in all directions: 

(a) Alternately

(b) Randomly 

(c) Constantly

(d) Uniformly ✓

15. Solid particles possess which of the following motion? 

(a) Rotational Motion

(b) Linear Motion

(c) Vibrational Motion ✓

(d) Translation Motion

16. Which principle is used in a working pressure cooker?

(a) Boiling point increased by increasing the external pressure ✓

(b) The boiling point decreased by decreasing the external pressure

(c) The boiling point increased by increasing the external pressure

(d) All of these

17. Which of the following is not amorphous?

(a) Rubber

(b) Plastic

(c) Glucose ✓

(d) Glass

18. Which percentage of salt is required to kill the bacteria?

(a) 10%

(b) 20% ✓

(c) 30%

(d) 40%

19. In the evaporation process, liquid molecules which leave the surface of the liquid have: 

(a) very low energy 

(b) very high energy ✓

(c) moderate energy

(d) non of these

20. Mass per unit volume is called:

(a) Momentum 

(b) Density ✓

(c) Volume 

(d) Pressure 

21. Which one of the following does not affect the boiling point?

(a) Intermolecular forces 

(b) External forces 

(c) Nature of liquid 

(d) Initial temperature of liquid ✓

22. Which one of the following gases diffuses most slowly?

(a) O2

(b) NH3

(c) Cl2 ✓

(d) Non of these

23. Example of a crystalline form of carbon: 

(a) Coal

(b) Graphite ✓

(c) Lamp Black 

(d) Cock 

24. Which of the following expands or compresses easily? 

(a) Liquid 

(b) Solids

(c) Gases ✓

(d) Water 

25. The vapor pressure of a liquid increases with the: 

(a) Increase of pressure 

(b) Increase in temperature ✓

(c) Increase of intermolecular forces 

(d) Increase of polarity of molecules 

Chemistry Class 9 Chapter 5 Physical States of Matter PDF Notes & Questions Answers from Sindh Board Textbook Exercise 

Are you searching for class 9 Chemistry Chapter 5 Physical States of Matter PDF Notes from the Sindh Board Textbook?

If yes, then you will be happy to know that today we are going to share Class 9 Chemistry Chapter 5 Physical States of Matter Notes in PDF here.

Chemistry Class 9 Chapter 5 Physical States of Matter Short Questions with Answers from Textbook Exercise

We are starting this section of the post with Chemistry Class 9 Chapter 5 Physical States of Matter Short Questions with Answers from the Sindh Textbook Exercise.

Q.01: Name the properties of gases.

Ans: The kinetic molecular theory explains the behavior of gases such as: 

• Diffusion 
• Effusion 
• Compressibility
• Pressure 
• Mobility
• Density

Q.02: What is Density?

Ans: Density is defined as "Mass per unit Volume"

Mathematically, Density is defined as D = M/V

Short Questions from exercise 

Before downloading the PDF File, candidates can read online Chemistry Class 9 Chapter 5 Physical States of Matter Short Questions from here to get an idea of what is inside the PDF File. 

Here is the list of Short Questions from Sindh Board Class 9 Chemistry Chapter 5 Physical States of Matter, which are included in the PDF File.

Q.01: What is diffusion, Explain with an example. 

Q.02: Define Standard Atmospheric Pressure. What are its units? How it is related to Pascal?

Q.03: Why are the densities of gases lower than that of liquids?

Q.04: What do you mean by evaporation, how it is affected by surface area? 

Q.05: Define the term allotropy with examples.

Q.06: In which form sulfur exists at 100°C? 

Q.07: What is the relationship between evaporation and the boiling point of a liquid? 

Q.08: What is Atmospheric Pressure? 

Q.09: Define the compressibility of gases. 

Q.10: Define the mobility of gases. 

Above-given 9th Chemistry Chapter 5 Solved Short Question from textbook exercise can be study from here.

Chemistry Class 9 Chapter 5 Physical States of Matter Detailed Questions with Answers from Textbook Exercise

Here are the Chemistry Class 9 Chapter 5 Physical States of Matter Detailed Questions with Answers from the Sindh Textbook Exercise.

Q.01: Write down the general properties of gaseous state.

Q.02: State Boyle's Law. Give the experimental verification of Boyle's Law.

Q.03: State Charle's Law. Give the experimental verification of Charle's Law.

Q.04: Explain the absolute temperature scale with example.

Q.05: In which units body temperate is measured.

Q.06: Explain the physical states of matter and intermolecular forces.

Q.07: What are liquids? Name some important properties of liquids. 

Q.08: Explain the evaporation. Write down the factors affecting the evaporation. 

Q.09: Describe the phenomenon of diffusion in liquids along with factors which influence it. 

Ans: Detailed Answers of above-mentioned questions from 9th class chemistry chapter 5 Physical States of Matter Sindh Textbook Exercise have been included in below-given PDF file.

Chemistry Class 9 Chapter 5 Physical States of Matter Numericals from Textbook Exercise

Students can read solved numerical from the Sindh Board class 9 chapter 5 Physical States of Matter. 

1) Convert the following units:

(a) 100 °C to K

(b) 150 °C to K

(c) 780 K to °C

(d) 170 K to °C

Solution

a) 100 °C to K

Data:

Temperature in Celsius (C) = 100 °C

Temperature in Kelvin (K) = ?

Formula:

K = 273 + °C

Calculation:

K = 273 + 100 = 373 K Ans.

(b) 150 °C to K

Data:

Temperature in Celsius (C) = 150 °C

Temperature in Kelvin (K) = ?

Formula:

K = 273 + °C

Calculation:

K = 273 + 150 = 423 K Ans.

(c) 780 K to °C

Data:

Temperature in Kelvin (K) = 780 K

Temperature in Celsius (C) = ?

Formula:

°C = K - 273

Calculation:

°C = 780 - 273 = 507 °C Ans.

(d) 170 K to °C

Data:

Temperature in Kelvin (K) = 170 K

Temperature in Celsius (C) = ?

Formula:

°C = K - 273

Calculation:

°C = 170 - 273 = - 103 °C Ans.

The 700 cm3 of a gas is enclosed in a container under a pressure of 650 mm of Hg. If the volume is reduced to 350 cm3, what will be the pressure then?

Solution:

Data:

• V1 = 700 cm3
• P1 = 650 mm
• V2 = 350 cm3
• P2 = ?

Formula:

P₁ V₁ = P₂ V₂

A sample of Hydrogen gas has a volume of 350 cm3 at 40 °C. If gas is allowed to expand up to 700 m3 at constant pressure. Find out its final temperature?

Solution:

Data:

• T1 = 40 °C = 40+273 K = 313 K
• V1= 350 cm3
• V2= 700 cm3
• T2 = ?