Which of the following statements about the electron is incorrect?
(i) It is a negatively charged particle.
(ii) The mass of electron is equal to the mass of neutron.
(iii) It is a basic constituent of all atoms.
(iv) It is a constituent of cathode rays.

Answer: Option (iv)
Solution: Option (i) is a correct statement.
The electron is a subatomic particle that carries a negative charge and is found outside the nucleus of an atom.
Option (ii) is an incorrect statement. The mass of the electron is much smaller than the mass of the neutron. The mass of the electron is approximately 9.11 x 10-31 kg, while the mass of the neutron is approximately 1.67 x 10-27 kg. In other words, the mass of an electron is approximately 1/1836 times the mass of a neutron
Option (iii) is a correct statement. The electron is one of the three basic constituents of an atom, along with protons and neutrons. Electrons are negatively charged particles that orbit the nucleus of an atom.
Option (iv) is a correct statement. Cathode rays are streams of electrons that are emitted from the cathode of a cathode ray tube. The electrons in cathode rays have a negative charge and are responsible for the properties of cathode rays.

For Free Noteshttps://answerxpert.com/free-notes-answerxpert/
For Free Mock Testshttps://answerxpert.com/mock-tests-answerxpert/
Youtube channels for video solutionshttps://www.youtube.com/@AveshChemistry_
https://www.youtube.com/@AnswerXpert

Leave a Reply

Your email address will not be published. Required fields are marked *