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Class 9 Science Chapter 4 Structure Of The Atom Quiz 1
Are you ready to test your understanding of Class 9 Science Chapter 4 Structure of the Atom? This first quiz focuses on the fundamental concepts covered in this chapter, offering a range of Atomic structure multiple choice questions designed to challenge your knowledge. Whether you’re preparing for your exams or simply revising, this Class 9 Structure of Atom MCQ quiz will help reinforce what you’ve learned.
From understanding protons, neutrons, and electrons to exploring atomic models, this Science Chapter 4 Atom quiz is the perfect way to check your grasp on key topics. You’ll find questions similar to those in your exams, making this an excellent CBSE Class 9 Science Structure of Atom quiz for exam prep. Get started with Quiz 1 today, and continue building your knowledge as we progress through up to Quiz 5. Each quiz offers a deeper dive into Class 9 Science Atom quiz questions that align with your syllabus, ensuring you’re fully prepared for your Atom quiz for class 9 CBSE syllabus exams.
Good luck, and let’s see how well you know the structure of the atom.
Class 9 Science Structure of the Atom Quiz 1 Rules
- Quiz 1 will test students on the foundational concepts related to atomic structure.
- It includes multiple-choice questions to evaluate knowledge of atomic models, electron configuration, and the discovery of subatomic particles.
- Answer all questions carefully to strengthen your understanding of the chapter’s core ideas.
- Use this quiz as a revision tool for your upcoming exams and to identify areas where more practice may be needed.
Class 9 Science Structure of the Atom Quiz 1 Structure
- The quiz focuses on key concepts from Chapter 4 of Class 9 Science.
- The structure consists of multiple-choice questions assessing understanding of:
- Atomic structure
- Different atomic models
- Electron arrangement within an atom
- The goal is to help students revise and prepare for future assessments.
- Additional quizzes will follow, leading up to Quiz 5, to ensure complete mastery of the chapter.
Class 9 Chemistry Chapter 4 Structure Of The Atom Quiz 2 Questions
Question 1: Mass of the atom is equal to
a) Combined mass of electrons, protons, and neutrons
b) Combined mass of protons and neutrons
c) Mass of protons only
d) Mass of neutrons only
Answer:
The correct answer is b) Combined mass of protons and neutrons.
The atomic mass of an element is nearly equal to the total number of protons added to the number of neutrons in one atom of that element. Electrons have negligible mass.
Question 2: Is it true that atoms are divisible?
a) True
b) False
Answer:
The correct answer is a) True.
Atoms are divisible because they consist of different particles like electrons, protons, and neutrons. The formation of ionic compounds involves the transfer of electrons, and isotopes exist due to the difference in neutrons.
Question 3: According to Dalton’s atomic theory, matter is made up of
a) Molecules
b) Ions
c) Atoms
d) Mixtures
Answer:
The correct answer is c) Atoms.
According to Dalton’s atomic theory, all matter, whether an element, a compound, or a mixture, is composed of small particles called atoms.
Question 4: Is it true that atoms of different elements have different masses?
a) True
b) False
Answer:
The correct answer is a) True.
Atoms of different elements have different masses because each subsequent element has an additional electron and proton, both of which contribute to the mass.
Question 5: According to Dalton’s atomic theory, atoms are
a) Divisible
b) Indivisible
c) Heavier
d) Complex
Answer:
The correct answer is b) Indivisible.
According to Dalton’s atomic theory, atoms are indivisible particles and cannot be created or destroyed in a chemical reaction. This was later disproven with the discovery of subatomic particles.
Question 6: Which of the following is not a limitation of Dalton’s atomic theory?
a) The concept of isotopes was not considered.
b) It did not consider that atoms can be divided into subatomic particles.
c) It did not explain the law of chemical combination.
d) It did not consider the existence of isobars.
Answer:
The correct answer is c) It did not explain the law of chemical combination.
Dalton’s theory could explain the laws of chemical combination. However, it failed to account for isotopes, isobars, and the divisibility of atoms.
Question 7: Who proposed that an atom can neither be created nor be destroyed?
a) Ernest Rutherford
b) John Dalton
c) Neils Bohr
d) J. J. Thomson
Answer:
The correct answer is b) John Dalton.
According to Dalton’s atomic theory, an atom is indivisible and indestructible, meaning it can neither be created nor destroyed.
Question 8: Is it true that Dalton was unable to explain the concept of isobars and isotopes?
a) True
b) False
Answer:
The correct answer is a) True.
Dalton’s atomic theory stated that atoms of the same element are identical, but later discoveries revealed isotopes and isobars, which differ in mass and atomic number, respectively.
Question 9: Which of the following was proposed by Dalton’s atomic theory?
a) Matter consists of divisible atoms
b) All atoms of a given element differ in their properties
c) Compounds are formed when atoms of the same element combine in a fixed ratio
d) Chemical reactions involve the reorganization of atoms
Answer:
The correct answer is d) Chemical reactions involve the reorganization of atoms.
Dalton’s theory states that matter consists of indivisible atoms, and compounds are formed when atoms combine in a fixed ratio. During chemical reactions, atoms are reorganized, not created or destroyed.
Question 10: According to Dalton’s atomic theory, an atom can
a) Be created
b) Be destroyed
c) Neither be created nor destroyed
d) Be centrifuged
Answer:
The correct answer is c) Neither be created nor destroyed.
Dalton’s atomic theory states that atoms are conserved during a chemical reaction; they are neither created nor destroyed.
