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Test: Subatomic Particles - NEET MCQ


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5 Questions MCQ Test Chemistry Class 11 - Test: Subatomic Particles

Test: Subatomic Particles for NEET 2024 is part of Chemistry Class 11 preparation. The Test: Subatomic Particles questions and answers have been prepared according to the NEET exam syllabus.The Test: Subatomic Particles MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Subatomic Particles below.
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Test: Subatomic Particles - Question 1

The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this ratio by measuring the deflection of cathode rays in electric and magnetic fields. What value did he find for this ratio?

Detailed Solution for Test: Subatomic Particles - Question 1

Charge of an electron is
= −1.6 × 10−19C
Mass of electron is
9.1 × 10−31kg = 9.1 × 10−28g
Thus, Charge/mass ratio is


- ve sign is only a convention used by us
= - 1.76 × 108 coulombs/g

Test: Subatomic Particles - Question 2

The number of electrons which will together weigh one gram is

Detailed Solution for Test: Subatomic Particles - Question 2

Mass of electron = 9.1096 x 10-31 kg

= 1.098 x 1027 electrons

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Test: Subatomic Particles - Question 3

How many number of electrons are present in a particle which carries a charge of 5.5 x 10-16 C?

Detailed Solution for Test: Subatomic Particles - Question 3

Charge carried by one electron
= 1.6022 x 10-19 C
Electrons presents in 5.5 x 10-16 C

Test: Subatomic Particles - Question 4

Which experiment is responsible for finding out the charge on an electron?

Detailed Solution for Test: Subatomic Particles - Question 4

The value (magnitude) of electron charge was determined by Millikan's oil drop experiment.
Cathode ray discharge tube experiment gave the sign of electron charge Rutherford's experiment gave the presence of electrons around the dense nucleus
Photoelectric experiment explained the production of electricity from light irradiation on the metal surface.

Test: Subatomic Particles - Question 5

Match the values of column II with column I and mark the appropriate choice.

Detailed Solution for Test: Subatomic Particles - Question 5

(A) Mass of electron = 9.1 × 10−31 Kg
(B) Mass of proton = 1.673 × 10−27 kg
(C) Charge of electron = −1.602 × 10−19 C
(D) e/m for an electron = 1.76 × 108 C/g
Thus option B is the correct answer.

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