Parho
Get started free
ClassesPricingBlogLibraryLog in

Class 9 Chemistry · Chapter 2 · Test 1

Subatomic Particles and Models

25 MCQs • Practice the discovery of electrons, protons and neutrons, atomic structure, and early atomic models.

MCQs

25 questions · 20 min · 25 marks

Sign up free to take itI have an account

Want to try first? Take the free Chemistry test: States of Matter Basics

Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

  1. Question 1

    Who proposed the idea that matter is made of tiny indivisible particles called atoms?

    • AJohn Dalton
    • BDemocritus
    • CJ.J. Thomson
    • DErnest Rutherford
    Show answer

    Answer: B

    Democritus proposed the early idea that matter consists of indivisible particles called atoms.

  2. Question 2

    Which scientist provided experimental evidence supporting the atomic theory?

    • ADemocritus
    • BGoldstein
    • CJohn Dalton
    • DBohr
    Show answer

    Answer: C

    John Dalton used experimental evidence to develop a scientific atomic theory.

  3. Question 3

    Which apparatus was used by J.J. Thomson to investigate cathode rays?

    • ASpectrometer
    • BDischarge tube
    • CCalorimeter
    • DMicroscope
    Show answer

    Answer: B

    A discharge tube containing gas at low pressure was used to study cathode rays.

  4. Question 4

    What did J.J. Thomson observe when cathode rays passed through an electric field?

    • AThey moved toward the negative plate
    • BThey moved toward the positive plate
    • CThey remained undeflected
    • DThey changed into protons
    Show answer

    Answer: B

    Cathode rays are negatively charged and are attracted toward the positive plate.

  5. Question 5

    Which subatomic particle was discovered through experiments with cathode rays?

    • AProton
    • BNeutron
    • CElectron
    • DNucleus
    Show answer

    Answer: C

    J.J. Thomson's cathode-ray experiments established the existence of electrons.

More tests in Atomic Structure

Practise with a free account

Save your scores, see which chapters need work, and keep a notebook of every question you got wrong.

Create free account