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.

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

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2. S.I. unit of temperature is -

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3. Pressure of air at sea level is -

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4. .................. is the amount of water vapours present in air.

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5. 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?

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6. 10. In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container

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

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8. Which of the following is not correct for gases ?

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9. The boiling point of alcohol is 78 oC. What will be the temperature in Kelvin scale ?

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10. Which condition out of the following will increase the evaporation of water?

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11. Latent heat of vaporisation of water is -

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12. The intermixing of particles of two different types of matter on their own is called -

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

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14. During evaporation, particles of a liquid change into vapors only -

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15. Dry ice means -

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.