Chemistry · JEE

Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle Concepts for JEE

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Quick answer

Master Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

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Concept explainer

Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle is a core JEE Main Chemistry subtopic under Atomic Structure. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

Understand the definition and scope of Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle in the JEE syllabus
Memorise key formulas and standard results linked to Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle and reattempt after 48 hours

Common trap

Students often rush Dual nature of matter, de Broglie's relationship, Heisenberg uncertainty principle questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

Part of Atomic Structure in JEE Main Chemistry.

Free sample questions

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Q1ChemistryUnit 2: Atomic Structure

Uncertainity in position of a particle of

25 \mathrm{g}

in space is

10^{-15} \mathrm{m} .

Determine uncertainity in velocity

\left(\mathrm{m} \mathrm{sec}^{-1}\right)

in it. (plank's constant,

\boldsymbol{h}=\mathbf{6 . 6} \times \mathbf{1 0}^{-\mathbf{3 4}} \mathbf{J s}

)

Q2ChemistryUnit 2: Atomic Structure

An electron in

H

-atom in ground state absorbs 1.5 times as much energy as the minimum required for its escape (i.e.,

13.6 e V)

from the atom. Calculate the wavelength of emitted electron.

Q3ChemistryUnit 2: Atomic Structure

Assertion According to de Broglie, the wavelengths associtated with electrons and other subatomic particles can be detected experimentally. Reason The wavelength associated with any material particle is directly proportional to its mass.

Q4ChemistryUnit 2: Atomic Structure

If the following matter waves travel with equal velocity, the longest wavelength is that of a/an:

Q5ChemistryUnit 2: Atomic Structure

If the kinetic energy of a particles is reduced to half, de broglie wave length becomes:

Q6ChemistryUnit 2: Atomic Structure

The uncertainty in position of an electron

\left(\boldsymbol{m}=\mathbf{9 . 1} \times \mathbf{1 0}^{-\mathbf{2 8}} \mathbf{g m}\right)

moving with a velocity

3 \times 10^{4} \mathrm{cm} / \mathrm{s}

accurate upto

0.001 \%

will be:

Q7ChemistryUnit 2: Atomic Structure

The wave length of an electron wave is inversely proportional to and

Q8ChemistryUnit 2: Atomic Structure

The uncertainty (in meters) in the position of an insect weighing

0.68 g

and traveling at a velocity of

0.85 \mathrm{m} / \mathrm{s}

(the uncertainty in the velocity is 0.1

m / s),

is:

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