Physics

Matter and Quantum Mechanics

1,427 Questions

This topic addresses core concepts in quantum mechanics, statistical thermodynamics, and states of matter. Questions cover quantum field theory, particle behavior, and statistical distributions. This material is essential for physics competitive exams.

Statistical ensemblesQuantum field theoryParticle physicsStates of matterWave particle duality

Matter and Quantum Mechanics Questions

Multiple choice evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

Which of the following statements is TRUE of matter?

  1. The states of matter are interconvertible

  2. Force of attraction varies from one kind of matter to another

  3. The states of matter can be changed by changing the temperature of pressure

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Matter is a substance which has mass and takes up space by volume the properties of matter are,

States of matter (solid,liquid,gas)are inter convertable.
Force of attraction varies from one kind of matter to another.
States of matter can be varied by varying temperature and pressure.

Multiple choice evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

Choose one of the following definitions that give the correct meaning of matter :

  1. anything that occupies space and has mass is known as matter.

  2. anything that has definite shape and volume is known as matter.

  3. anything that has mass but not definite shape is known as matter.

  4. anything that is intangible is known as matter.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

There are many possible definitions of Matter. Matter is termed as any substance that has mass and occupy space.

Examples of matter- protons, atoms, molecules, compounds, pen, cap, ball, tree, cat, dog ,etc.
Examples that are not matter- light (photons), UV rays, heat, thought, infra-red waves, microwaves, emotions, etc.

Multiple choice chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

Which of the following is not a postulate of Dalton's atomic theory?

  1. All matter is made of very tiny particles called atoms

  2. Atoms of a given element are not identical in mass and chemical properties

  3. Atoms combine in a ratio of small whole numbers to form compounds

  4. The relative number and kinds of atoms are constant in a given compound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The postulates of Dalton"s atomic theory may be stated as follows:
(i) All matter is made of very tiny particles called atoms.
(ii) Atoms of a given element are identical in mass and chemical properties.
(iii) Atoms of different elements have different masses and chemical properties.
(iv) Atoms combine in the ratio of small whole numbers to form compounds.
(v) The relative number and kinds of atoms are constant in a given compound.


So Atoms of a given element are not identical in mass or chemical properties.
This is not a Postulate of atomic theory.

Multiple choice chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

What are the merits of Dalton's atomic theory?

  1. Explains laws of chemical combination

  2. Distinguishes between fundamental particles of element

  3. Both A and B

  4. Proves individuality
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The atomic theory explains the laws of chemical combination (the Law of Constant Composition and the Law of Multiple Proportions) Dalton was the first person to recognize a workable distinction between the fundamental particle of an element (atom) and that of a compound (molecule).

Multiple choice chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

The existence of isotopes violated which one of the postulates of Dalton's atomic theory?

  1. All matter is made of very tiny particles called atoms

  2. Atoms of a given element are identical in mass and chemical properties

  3. Atoms are indivisible particles and cannot be created nor destroyed

  4. Atoms of same elements are alike in all respects
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Isotopes are atoms of same elements having same atomic number but different atomic masses.

Multiple choice chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

Which postulates of Dalton's atomic theory can explain the Law of definite proportion?

  1. All matter is made of very tiny particles called atoms.

  2. Atoms of a given element are identical in mass and chemical properties.

  3. Atoms are indivisible particles and cannot be created nor destroyed.

  4. The relative number and kind of atoms in a given compound remain constant.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The law of definite proportion states that in compounds , the elements are always present in definite proportions by mass.

Multiple choice chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

Which postulate of Dalton's atomic theory is the result of the law of conservation of mass?

  1. All matter is made of very tiny particles called atoms

  2. Atoms of a given element are identical in mass and chemical properties

  3. Atoms of different elements have different masses and chemical properties

  4. Atoms are indivisible particles and cannot be created nor destroyed
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

According to Dalton's  theory atoms are indivisible particles and cannot be created nor destroyed.

Multiple choice evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

 Matter is composed of:

  1. atoms

  2. molecules

  3. tiny particles

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Matter is anything which have mass and occupy space. Substance and Mixture is the main part of the matter. Substance is the further classified in elements and compound, which is further categorized as atom and molecule. 

Hence, matter is composed of everything atoms, molecules, tiny particles etc.

Multiple choice physics isothermal and adiabatic processes work done by an ideal gas in isothermal expansion thermodynamic processes heat and thermodynamics

A physical quantity that is conserved in a process

  1. must have the same value for all observers

  2. can never take negative values

  3. must be dimensionless

  4. need not necessarily be a scalar
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A conserved quantity in physics, such as energy or momentum, is independent of the observer's frame of reference (though its specific value might change, the property of being conserved is invariant).

Multiple choice physics the kinetic model of matter force and kinetic theory change of states phase change

Define intermolecular force of attraction.

  1. The force of attraction between the electrons and protons of an atom is called the intermolecular force of attraction.

  2. The force of attraction between the molecules of matter is called the intermolecular force of attraction.

  3. The force of attraction between the elements in a molecule is called the intermolecular force of attraction.

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The force of attraction between the molecules of matter is called the intermolecular force of attraction.