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Class 9 Science Chapter 1 Matter in Our Surrounding Quiz 3
Welcome to Quiz 3 on Matter in Our Surroundings. After going through Quiz 1 and Quiz 2, this quiz will take your learning journey a step further. This chapter introduces the concept of matter, focusing on its various forms and how it behaves under different conditions. You’ll revisit the three states of matter—solid, liquid, and gas—and dive deeper into the changes they undergo when exposed to varying temperatures and pressures. You’ll also explore key concepts like diffusion, evaporation, and sublimation, helping you to better understand how matter interacts with its surroundings.
In this quiz, you’ll be tested on important topics such as:
- The characteristics of solids, liquids, and gases.
- How temperature and pressure affect the state of matter.
- The process of converting one state to another, like melting, boiling, and condensation.
- Phenomena like evaporation and its effects on cooling.
By the end of this quiz, you will be more confident in handling questions related to matter and its properties.
Matter in Our Surrounding Quiz 3 Rules:
- Time Duration: You will have 15 minutes to finish this quiz.
- Answer Options: Each question presents you with several possible answers.
- Single Correct Choice: Only one answer is correct for each question.
- No Penalty: There is no negative marking for wrong answers, so feel free to attempt all questions.
Matter in Our Surrounding Quiz 2 Structure:
- Total Number of Questions: 10
- Topics Covered: This quiz focuses on testing your grasp of essential concepts from Chapter 1 Matter in Our Surroundings. It will assess your understanding of the different states of matter—solid, liquid, and gas—and how physical factors like temperature and pressure affect them. You’ll also dive into the molecular nature of matter, the gaps between particles, and the forces that bind them together.
Class 9 Chemistry Chapter 1 Matter in Our Surrounding Quiz Questions
Question 1: Which of the following quantities can only be a whole number?
a) Atomic radius
b) Atomic number
c) Mass number
d) Equivalent weight
Answer:
The correct answer is b) Atomic number.
Atomic number represents the number of protons in an atom, which is always a whole number.
Question 2: Which of the following is a physical change?
a) Rusting of Iron
b) Burning of Wood
c) Melting of Ice
d) Cooking of Food
Answer:
The correct answer is c) Melting of Ice.
Melting is a physical change as it involves a change of state from solid to liquid without altering the chemical composition.
Question 3: The type of force of attraction existing between a polar molecule like NH₃ and a non-polar molecule like benzene is:
a) Dipole-dipole forces
b) Ion-dipole interactions
c) Hydrogen bond
d) Dipole-induced dipole forces
Answer:
The correct answer is d) Dipole-induced dipole forces.
This interaction occurs between polar and non-polar molecules.
Question 4: Dipole-dipole interaction is stronger than the London forces but weaker than ion-ion interaction because:
a) Only partial charges are involved
b) Total charges are involved
c) Charge of more electronegative part is involved
d) None of the above
Answer:
The correct answer is a) Only partial charges are involved.
Dipole-dipole interactions involve partial charges, which makes them stronger than London forces but weaker than ion-ion interactions.
Question 5: Which of the following types of bond is a special case of dipole-dipole interaction?
a) H-bond
b) Bond present between HF molecules
c) Bond present between water molecules
d) All of the above
Answer:
The correct answer is d) All of the above.
H-bond is a special case of dipole-dipole interaction found in HF and H₂O molecules.
Question 6: The relative strength of interionic/intermolecular forces in decreasing order is:
a) Ion-dipole > ion-ion > dipole-dipole
b) Dipole-dipole > ion-dipole > ion-ion
c) Ion-dipole > dipole-dipole > ion-ion
d) Ion-ion > ion-dipole > dipole-dipole
Answer:
The correct answer is d) Ion-ion > ion-dipole > dipole-dipole.
Ion-ion interactions are stronger due to stronger electrostatic forces, while dipoles have weaker partial charges.
Question 7: Force of attraction between the particles of matter is known as the intramolecular force of attraction.
a) True
b) False
Answer:
The correct answer is b) False.
The force of attraction between the particles of matter is known as the intermolecular force of attraction, not intramolecular.
Question 8: The strength of the intermolecular force of attraction is the same for all kinds of matter.
a) True
b) False
Answer:
The correct answer is b) False.
The strength of intermolecular forces varies depending on the atoms and molecules present in different kinds of matter.
Question 9: Choose the correct option: Particles of the matter have a tendency to_____.
a) Attract each other
b) Repel each other
c) Cancel each other
d) Change each other
Answer:
The correct answer is a) Attract each other.
Particles of matter have a tendency to attract each other due to the intermolecular force of attraction.
Question 10: A diver can cut through the water in a swimming pool. Which characteristic of matter does this observation show?
a) Intermolecular forces are strong.
b) Intermolecular forces are moderate.
c) There are no intermolecular forces of attraction.
d) Intermolecular forces are the least.
Answer:
The correct answer is d) Intermolecular forces are the least.
This shows that the intermolecular forces in water are relatively weak, allowing the diver to cut through it easily.
