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Class 9 Science Chapter 3 Atoms and Molecules Quiz 2
Welcome to Quiz 2 of Class 9 Science Chapter 3: Atoms and Molecules. This Atoms and Molecules quiz 2 is designed to help you deepen your understanding of the chapter by testing your knowledge through a series of questions related to atoms, molecules, and chemical elements. Understanding the basic structure of atoms and molecules is essential for grasping more complex topics in chemistry. By attempting this quiz, you can assess how well you’ve understood the key concepts, including the atomic structure, molecules, and compounds, and identify areas where you need further revision.
This Class 9 chemistry quiz on atoms and molecules will prepare you for future assessments and build confidence in answering multiple-choice questions (MCQs). Don’t forget to check out Quiz 1 of Class 9 Science chapter 3 Atoms and Molecules for a complete preparation journey. Dive in and strengthen your foundation in atoms and molecules as you continue mastering the chapter.
Quiz 2 Rules for Class 9 Chemistry Atoms and Molecules
- Time Limit: You have 15 minutes to complete the quiz. Be sure to manage your time efficiently.
- Multiple Choices: Each question provides several answer options. Choose the one that best matches your understanding.
- Single Correct Answer: Every question has only one correct answer. Select the option you think is most accurate.
- No Negative Marking: There’s no penalty for incorrect answers, so if you’re unsure, make an educated guess without fear of losing points.
Quiz 2 Structure for Class 9 Chemistry Atoms and Molecules
- Total Questions: 10
- Topics Covered: This quiz focuses on important concepts from Chapter 3, “Atoms and Molecules.” It includes questions on the basic structure of atoms, molecules, compounds, and the laws that govern chemical combinations.
Good luck, and use the knowledge you’ve gained to confidently answer these Class 9 Chemistry quiz questions on atoms and molecules!
Class 9 Chemistry Chapter 3 Atoms and Molecules Quiz Questions
Question 1: Which of the following are stable?
a) Molecules
b) Ions
c) Atoms
d) All
Answer:
The correct answer is a) Molecules.
When two or more atoms combine, they form stable molecules.
Question 2: The element which does not form a cation or an anion is
a) Hydrogen
b) Helium
c) Oxygen
d) Nitrogen
Answer:
The correct answer is b) Helium.
Helium is a noble gas and does not lose or gain electrons, making it chemically inert.
Question 3: The fluorescence on the walls of the discharge tube is due to
a) Cathode Rays
b) Anode Rays
c) Canal Rays
d) X-Rays
Answer:
The correct answer is a) Cathode Rays.
Cathode rays are emitted when a gas under very low pressure is subjected to high voltage, and they cause fluorescence on the walls of the discharge tube.
Question 4: Which of the following isotopes is used in the treatment of cancer?
a) Iodine
b) Cobalt
c) Iron
d) Geranium
Answer:
The correct answer is b) Cobalt.
Cobalt-60 is a radioactive isotope used in cancer treatment.
Question 5: Uranium isotope is used in
a) Nuclear reactor
b) Cancer
c) Goitre
d) Age of rocks
Answer:
The correct answer is a) Nuclear reactor.
Uranium isotopes are used as fuel in nuclear reactors.
Question 6: The maximum number of electrons in the M-shell is
a) 2
b) 8
c) 18
d) 32
Answer:
The correct answer is c) 18.
The M-shell can hold a maximum of 18 electrons.
Question 7: “X” is an element with atomic number 17. The electronic distribution could be
a) 2, 8, 7
b) 2, 8, 5
c) 2, 8, 3
d) 2, 8, 1
Answer:
The correct answer is a) 2, 8, 7.
The element with atomic number 17 is chlorine, and its electronic configuration is 2, 8, 7.
Question 8: The charged particle formed by gaining or losing electrons by an atom is called
a) Ion
b) Atom
c) Element
d) Compound
Answer:
The correct answer is a) Ion.
Ions are formed when atoms gain or lose electrons.
Question 9: Tetravalent electropositive ions are
a) Platinum
b) Lead
c) Tin
d) All the above
Answer:
The correct answer is d) All the above.
Platinum, lead, and tin are electropositive elements that can show valency 4.
Question 10: The combination of atoms of the same element is known as
a) Molecule
b) Element
c) Compound
d) None
Answer:
The correct answer is a) Molecule.
A molecule is formed by the combination of atoms of the same element.
