Chapter 1: Matter in Our Surroundings

In Class 9 Science, Chapter 1 covers the topic of matter in our surroundings. Important concepts include:

  • Types of Matter: Solid, Liquid, and Gas
  • Properties of Different States of Matter
  • Relation between Different Temperature Scales
  • Physical Phenomena: Boiling and Evaporation
To know your total score, click the button at the end of the quiz. No negative marking.

2477

1. One atmosphere is equal to -

2472

2. S.I. unit of temperature is -

2468

3. Which of the following is not an example of matter ?

2479

4. A gas can be best liquefied -

2480

5. BEC stands for

2484

6. LPG Stands for -

2473

7. Sublimation is a process in which -

2447

8. During summer, water kept in an earthen pot becomes cool because of the phenomenon of

2482

9. The conversion of gas into liquid is called

2451

10. The boiling points of diethyl ether, acetone and n-butyl alcohol are 35$\mathrm{{}^\circ}$C, 56$\mathrm{{}^\circ}$C and 118$\mathrm{{}^\circ}$C respectively. Which one of the following correctly represents their boiling points in kelvin scale?

2444

11. Which one of the following sets of phenomena would increase on raising the temperature?

2478

12. Pressure of air at sea level is -

2445

13. Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions

2448

14. A few substances are arranged in the increasing order of 'forces of attraction' between their particles. Which one of the following represents a correct arrangement?

2481

15. Which state consist of super energetic and super excited particles

Important Concepts

1. Types of Matter:
Matter is anything that has mass and occupies space. It can be classified into three main states: solids, liquids, and gases, each with distinct properties.

2. Properties of Matter:
- **Solids:** Have a definite shape and volume. Their particles are tightly packed together.
- **Liquids:** Have a definite volume but take the shape of their container. The particles are close but can move around.
- **Gases:** Have neither definite shape nor volume. Their particles are far apart and move freely.

3. Temperature Scales:
The most commonly used temperature scales are Celsius, Fahrenheit, and Kelvin. Understanding the relationship between these scales is essential in science.

4. Physical Phenomena:
- **Boiling:** The process where a liquid turns into vapor when it reaches its boiling point.
- **Evaporation:** A slower process where molecules at the surface of a liquid gain enough energy to become gas.

Conclusion

The Chapter on Matter in Our Surroundings is fundamental in understanding the nature of various substances and their properties. Completing the quiz will enhance your grasp of these concepts.