Class 9 Chemistry Chapter 2 MCQ: Is Matter Around Us Pure? MCQ
The Class 9 Chemistry Chapter 2 MCQ: Is Matter Around Us Pure? Subject experts have curated MCQs based on the latest exam pattern and CBSE Class 9 Chemistry syllabus.
Since these Class 9 Chemistry Chapter 2 MCQ: Is Matter Around Us Pure? are a significant part of the latest CBSE exam pattern, this set of practice questions serves as an effective tool for assessing your understanding of key concepts and fostering critical thinking skills.
These thoughtfully curated MCQs cover all crucial topics, providing a diverse range of questions to practice for your upcoming board exams. Additionally, practicing these Class 9 Chemistry Chapter 2 MCQ: Is Matter Around Us Pure? can help Class 9 students gain confidence, improve time management skills, and excel in their CBSE Class 9 Board Exam.
Class 9 Chemistry Chapter 2 MCQ: Is Matter Around Us Pure? MCQ
Here are Class 9 Chemistry Chapter 2 MCQ: Is Matter Around Us Pure? MCQ along with answers and explanations.
1. What is called pure matter?
A) Matter composed of only one type of atom or molecule
B) Matter that has a fixed composition
C) Matter found in its natural state
D) Matter with impurities
Answer: A) Matter composed of only one type of atom or molecule
Explanation: Pure matter refers to substances composed of only one type of atom or molecule, without any impurities.
2. What are examples of pure matter?
A) Air and soil
B) Saltwater and sugar solution
C) Gold and oxygen gas
D) Vinegar and lemonade
Answer: C) Gold and oxygen gas
Explanation: Gold and oxygen gas are examples of pure matter because they consist of only one type of atom or molecule.
3. What is the full name of H2O?
A) Hydrogen monoxide
B) Dihydrogen oxide
C) Water
D) Hydrogen peroxide
Answer: C) Water
Explanation: H2O is the chemical formula for water.
4. What is true about a homogeneous mixture?
A) It has visible particles that settle over time
B) It has a uniform composition throughout
C) It can be separated by filtration
D) It consists of two or more phases
Answer: B) It has a uniform composition throughout
Explanation: A homogeneous mixture has a uniform composition and properties throughout its mass.
5. Which of the following is not a homogeneous mixture?
A) Saltwater
B) Air
C) Milk
D) Salad
Answer: D) Salad
Explanation: Salad is not a homogeneous mixture because it consists of visibly different components like vegetables, fruits, and dressing.
6. Which method is used to separate cream from milk?
A) Distillation
B) Filtration
C) Decantation
D) Centrifugation
Answer: D) Centrifugation
Explanation: Centrifugation is a method used to separate cream from milk based on differences in density.
7. Which of the statements is incorrect about physical change?
A) It involves a change in the state of matter
B) It alters the chemical composition of a substance
C) It is usually reversible
D) It does not form new substances
Answer: B) It alters the chemical composition of a substance
Explanation: Physical changes do not alter the chemical composition of a substance; they only change its physical properties.
8. Which of the following substances cannot be broken down into simpler substances?
A) Water
B) Oxygen
C) Carbon dioxide
D) Hydrogen
Answer: D) Hydrogen
Explanation: Hydrogen is an element and cannot be broken down into simpler substances by ordinary chemical means.
9. Which of the following is not a property of nonmetals?
A) Good conductors of electricity
B) Brittle
C) Dull appearance
D) Low melting and boiling points
Answer: A) Good conductors of electricity
Explanation: Nonmetals are typically poor conductors of electricity.
10. Which of the following elements are metalloids?
A) Sodium
B) Carbon
C) Silicon
D) Iron
Answer: C) Silicon
Explanation: Metalloids have properties intermediate between metals and nonmetals. Silicon is one such element.
11. Which of the following is not a property of metals?
A) Malleability
B) Brittleness
C) Ductility
D) Shiny appearance
Answer: B) Brittleness
Explanation: Metals are typically malleable and ductile, meaning they can be hammered into thin sheets and drawn into wires without breaking.
12. Which of the following is not a homogeneous mixture?
A) Saltwater
B) Brass
C) Vinegar
D) Air
Answer: B) Brass
Explanation: Brass is a metal alloy, which is a heterogeneous mixture of copper and zinc.
13. Is matter around us pure? (True or False)
Answer: False
Explanation: Matter around us is often not pure; it usually consists of mixtures of different substances. Pure substances are relatively rare in nature.