Chemistry · JEE

Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom Concepts for JEE

16+ syllabus-aligned questions available

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Master Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

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Concept explainer

Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom 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 Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom in the JEE syllabus
Memorise key formulas and standard results linked to Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom and reattempt after 48 hours

Common trap

Students often rush Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom 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

Which of the following statements is incorrect?

Q2ChemistryUnit 2: Atomic Structure

Radiation of wavelength 242 nm is sufficient to ionize the sodium atom. Calculate the ionization energy in

\boldsymbol{k J} \boldsymbol{m o l}^{-1} \cdot\left(\boldsymbol{n}=\mathbf{6 . 6 2 5} \times \mathbf{1 0}^{-\mathbf{3 4}} \boldsymbol{J}-\boldsymbol{s}\right)

Q3ChemistryUnit 2: Atomic Structure

Which of the following statements is not true about canal rays?

Q4ChemistryUnit 2: Atomic Structure

A sample of water is vaporized and tested in a mass spectrometer. There are 3 isotopes of hydrogen,

1 H,^{2} H

and 3. H. There are 2 isotopes of oxygen,

^{15} \boldsymbol{O}

and

^{16}

O. How many peaks would be expected to be found on the mass spectrum?

Q5ChemistryUnit 2: Atomic Structure

In a measurement of quantum efficiency of photosynthesis in green plants, it was found that 10 quanta of red light of wavelength

6850 A

were needed to release one molecule of

\boldsymbol{O}_{2}

The average energy storage in this process is 112 kcal per mol of

O_{2}

evolved. What is the energy conversion efficiency in this experiment? Given: 1 cal

=4.18 J ; N_{A}=6 \times

\mathbf{1 0}^{\mathbf{2 3}} ; \boldsymbol{h}=\mathbf{6 . 6 3} \times \mathbf{1 0}^{-\mathbf{3 4}} \boldsymbol{J} . \boldsymbol{s}

Q6ChemistryUnit 2: Atomic Structure

X

-rays are produced when a stream of electrons in an

X

-ray tube:

Q7ChemistryUnit 2: Atomic Structure

Electromagnetic radiation with maximum wavelength is:

Q8ChemistryUnit 2: Atomic Structure

Which among the following is correct about

\gamma-

rays ?

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Focus on core ideas across Nature of electromagnetic radiation, photoelectric effect, spectrum of the hydrogen atom. JEE tests application, not just memorisation.