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Class 9 Science Chapter 1 Matter in Our Surrounding Quiz 2
Welcome to Quiz 2 on Matter in Our Surroundings Class 9 Science(Chemistry). In this chapter, we explore the fundamental concept of matter, its properties, and its various states. Understanding matter is crucial as it forms the basis of everything around us, from the air we breathe to the water we drink and the objects we interact with daily.
In Quiz 1 on Matter in Our Surroundings, we dived into the basic definitions and characteristics of matter, setting the stage for a deeper exploration of its forms and behaviors. Now, in Quiz 2, we will build upon that knowledge by examining concepts such as the states of matter—solid, liquid, and gas—and their unique properties.
This Class 9 Science Chapter 1 Matter in Our Surrounding quiz will challenge your understanding of key concepts, encourage critical thinking, and help reinforce the material covered in class. So, get ready to test your knowledge and have fun while learning about the fascinating world of matter!
Quiz 2 Rules:
- Time Limit: You have 15 minutes to complete this quiz.
- Multiple Choices: Each question offers several answer options.
- Single Correct Answer: Only one option is correct for each question.
- No Negative Marking: Incorrect answers won’t result in any penalty.
Quiz 2 Structure:
- Total Questions: 10
- Covered Topics: This Class 9 Science chapter 1 Matter in Our Surrounding quiz tests your understanding of the core concepts of matter, including its states (solid, liquid, gas), and the physical properties that influence its behavior in everyday life. It also explores the particulate nature of matter, the spaces between particles, and the forces of attraction acting among them.
Class 9 Chemistry Chapter 1 Matter in Our Surrounding Quiz Questions
Question 1: The substance formed when ammonia and hydrochloric acid react with each other is:
a) Ammonium nitrate
b) Ammonium chloride
c) Ammonium phosphate
d) Ammonium sulphate
Answer:
The correct answer is b) Ammonium chloride.
The reaction between ammonia and hydrochloric acid produces ammonium chloride as a solid.
Question 2: Which of the following can be compressed more?
a) Iron
b) Water
c) Air
d) Wooden piece
Answer:
The correct answer is c) Air.
Gases like air are highly compressible compared to solids and liquids because of the larger space between molecules.
Question 3: Which of the following is an amorphous solid, not a crystalline?
a) Diamond
b) Graphite
c) Common Salt
d) Glass
Answer:
The correct answer is d) Glass.
Glass is an example of an amorphous solid, where the atoms and molecules are arranged in a random pattern, unlike in crystalline solids.
Question 4: In a crystal of sodium chloride, how many chloride ions surround the sodium ion?
a) 4
b) 8
c) 12
d) 6
Answer:
The correct answer is d) 6.
In a sodium chloride crystal, each sodium ion is surrounded by six chloride ions, and vice versa.
Question 5: Naphthalene balls disappear with time without leaving any solid. Which process is involved?
a) Evaporation
b) Sublimation
c) Condensation
d) Vaporization
Answer:
The correct answer is b) Sublimation.
Naphthalene undergoes sublimation, changing from a solid directly to a gas without passing through a liquid state.
Question 6: The S.I. unit of luminous intensity is ____?
a) Candela
b) Pascal
c) Joule
d) Faraday
Answer:
The correct answer is a) Candela.
Candela is the SI unit for measuring luminous intensity.
Question 7: Which of the following ratios express pressure?
a) Force/Area
b) Energy/Volume
c) Energy/Area
d) Force/Volume
Answer:
The correct answer is a) Force/Area.
Pressure is defined as the force applied per unit area.
Question 8: Which of the following is highly compressible?
a) Solid
b) Liquid
c) Gas
d) None
Answer:
The correct answer is c) Gas.
Gases are highly compressible due to the large spaces between their molecules compared to solids and liquids.
Question 9: Which one is not a fluid?
a) Iron
b) Air
c) Water
d) Oil
Answer:
The correct answer is a) Iron.
Fluids are substances that flow and lack rigidity. Iron, being a solid, does not flow like air, water, or oil.
Question 10: The physical state of water at 273 K is:
a) Solid
b) Liquid
c) Gas
d) Both A and B
Answer:
The correct answer is d) Both A and B.
At 273 K, water exists in a dynamic equilibrium between the solid and liquid states.
