Class 12 Chemistry Chapter 1 MCQ. We covered all the Class 12 Chemistry Chapter 1 MCQ in this post for free so that you can practice well for the exam.
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Mock Test on Chemistry for Class 12 Students
Which of the following is not a sub-atomic particle?
(a) Neutron
(b) Proton
(c) Deuteron
(d) Electron
Option c – Deuteron
The Nucleus of an atom consists of the
(a) proton
(b) neutron
(c) proton and neutron
(d) electron, proton, and neutron
Option c – proton and neutron
Which statement(s) is/are correct regarding Daltons’ Atomic theory? I. All matter is made of very tiny particles. II. Atoms of different elements have different masses and chemical properties. III. The relative number of atoms is variable in any compound. Codes
(a) Only I and II
(b) Only I and III
(c) Only II and III
(d) All I, II, and III
Option a – Only I and II
The absolute value of charge on an electron was determined by
(a) JJ Thomson
(b) Rutherford
(c) Priestly
(d) RA Millikan
Option d – RA Millikan
Electrons move around the nucleus in ……. motion.
(a) translatory
(b) spin
(c) orbital
(d) vibrational
Option c – orbital
In an X-ray tube, a potential difference of several thousand volts accelerates electrons which then hit the target, and X-rays are emitted. Why are the X-rays emitted?
(a) Because of electron transition in an atom.
(b) Because of the removal of an electron from an atom.
(c) Because electrons get decelerated.
(d) Because of the heat produced in the collision.
Option c – Because electrons get decelerated
Which of the following are the properties of an electron? I. Electron is a constituent of the cathode ray. II. Electron is a negatively charged particle. III. The mass of the electron is equal to the mass of the proton. IV. Electron is deflected by the electric field but not by a magnetic field. Select the correct answer using the codes given below.
(a) I and II
(b) I, II and III
(c) III and IV
(d) I and IV
Option a – I and II
An atomic number of an atom gives the number of which of the following?
(a) Electrons
(b) Protons
(c) Neutrons
(d) Neutrons and Protons
Option b – Protons
Which of the following is the correct statement about proton?
(a) Proton is the nucleus of deuterium.
(b) Proton is a particle.
(c) Proton is an ionized hydrogen molecule.
(d) Proton is ionized hydrogen.
Option d – Proton is ionized hydrogen
In an atom, the neutron was discovered by
(a) JJ Thomson
(b) Chadwick
(c) Rutherford
(d) Newton
Option b – Chadwick
Which of the following elements does not contain neutrons?
(a) Oxygen
(b) Nitrogen
(c) Hydrogen
(d) Copper
Option c – Hydrogen
A neutron is a fundamental particle carrying
(a) a charge of +1 and a mass of 1 unit.
(b) no charge and no mass.
(c) no charge and a mass of 1 unit.
(d) a charge of -1 and a mass of 1 unit.
Option c – no charge and a mass of 1 unit
Which one of the following statements is correct?
(a) Only electrons reside inside the nucleus of an atom.
(b) Both electrons and protons reside inside the nucleus of an atom.
(c) Only neutrons reside inside the nucleus of an atom.
(d) Both protons and neutrons can reside inside the nucleus of an atom.
Option d – Both protons and neutrons can reside inside the nucleus of an atom
Consider the following statements. I. The neutron was discovered in 1932 by bombarding beryllium with a-rays. II. The electron and proton have equal but opposite electron charges. III. The neutron is not charged. Which of the statement given above is/are correct?
(a) I and II
(b) II and III
(c) I and III
(d) I, II and III
Option d – I, II and III
Electrons in the highest energy level of an atom are called
(a) valence protons
(b) orbital protons
(c) valence electrons.
(d) orbital electrons
Option c – valence electrons
A body is charged negatively. It implies that
(a) it has lost some of its protons.
(b) it has lost some of its electrons.
(c) it has gained some electrons from the outside.
(d) None of the above
Option c – it has gained some electrons from the outside
Which one among the following statements about an atom is not correct?
(a) Atoms always combine to form molecules.
(b) Atoms are the basic units from which molecules and ions are formed.
(c) Atoms are always neutral in nature.
(d) Atoms aggregate in large numbers to form the matter we can see, feel and touch.
Option d – Atoms aggregate in large numbers to form the matter we can see, feel and touch
Consider the following statements I. The positive charge is essentially immovable because it contains practically all the mass of the atom. II. An atom is the smallest indivisible particle of an element that takes part in a chemical reaction. Which of the above statements is/are correct?
(a) Only I
(b) Only II
(c) I and II
(d) None of these
Option c – I and II
Who is regarded as the Father of Modern Chemistry?
(a) Rutherford
(b) Einstein
(c) Lavoisier
(d) CV Raman
Option c – Lavoisier
Who among the following proposed that the atom is indivisible?
(a) Dalton
(b) Berzelius
(c) Rutherford
(d) Avogadro
Option a – Dalton
A single type of atom is found in
(a) compounds of minerals.
(b) a mixture of minerals.
(c) native elements.
(d) None of the above
Option c – native elements
Atoms of different elements have
(a) the same atomic number and the same electronic configuration.
(b) different atomic numbers and the same electronic configuration.
(c) different atomic numbers and different numbers of valence electrons.
(d) a same number of electrons and neutrons.
Option c – different atomic numbers and different numbers of valence electrons
Which one of the following statements about an atom is not correct? ( Class 12 Chemistry Chapter 1 MCQ )
(a) Atoms of different elements may have the same mass numbers.
(b) Atoms of elements may have different mass numbers.
(c) All the atoms of an element have the same number of protons.
(d) All the atoms of an element will always have the same number of neutrons.
Option d – All the atoms of an element will always have the same number of neutrons
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