NEET Chemistry: Nature of electromagnetic radiation Practice Questions
14 free multiple-choice questions on Nature of electromagnetic radiation (Atomic Structure) for NEET Chemistry, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. The energy of an electromagnetic radiation quantum is directly proportional to its frequency. Which relationship correctly represents this proportionality?
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Correct answer: A — E = hf
The energy (E) of a photon is directly proportional to its frequency (f), which is described by Planck's relation, E = hf, where h is Planck's constant.
Q2. The energy of a photon is directly proportional to its momentum. This relationship is fundamental to the quantum nature of light.
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Correct answer: A — True
The momentum of a photon is related to its energy and wavelength, which is a core concept derived from quantum electrodynamics.
Q3. What is the relationship between the energy of a photon and its frequency?
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Correct answer: A — Energy is directly proportional to frequency
The energy of a photon is directly proportional to its frequency, as described by Planck's relation E = hν (where h is Planck's constant).
Q4. Electromagnetic waves are fundamentally a type of wave that exhibits which characteristic motion?
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Correct answer: D — Transverse
Electromagnetic radiation (like light) is a transverse wave, meaning the oscillation of the electric and magnetic fields is perpendicular to the direction of propagation.
Q5. If the frequency of a light wave increases, what happens to its wavelength, assuming the speed of light remains constant?
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Correct answer: B — Decreases
The relationship between frequency (ν), wavelength (λ), and the speed of light (c) is c = νλ. If c is constant, increasing frequency implies a decrease in wavelength (λ= c/ν).
Q6. The quantization of energy in electromagnetic radiation is based on the idea that energy is exchanged in discrete packets called what?
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Correct answer: D — Photons
Energy is quantized in the form of discrete packets of energy called photons.
Q7. Which statement best describes the relationship between the wave nature and the particle nature of electromagnetic radiation?
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Correct answer: D — Electromagnetic radiation exhibits both wave characteristics and particle characteristics (photons).
Electromagnetic radiation exhibits wave-particle duality. It travels as a wave but interacts with matter as discrete packets of energy called photons (particles).
Q8. Which type of electromagnetic radiation has the highest frequency among visible light, ultraviolet light, and X-rays?
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Correct answer: D — X-rays
The order of increasing energy/frequency among these is: Visible Light < Ultraviolet Light < X-rays. Therefore, X-rays have the highest frequency.
Q9. Which part of the electromagnetic spectrum generally possesses the highest energy?
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Correct answer: B — Gamma rays
Gamma rays have the shortest wavelength and the highest frequency, corresponding to the highest energy level in the electromagnetic spectrum.
Q10. The property of electromagnetic radiation that allows it to be described as a wave is known as:
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Correct answer: A — Wave-particle duality
Electromagnetic radiation exhibits wave properties (like interference and diffraction) and particle properties (as photons), demonstrating wave-particle duality.
Q11. In the context of electromagnetic radiation, the oscillation of the electric field and magnetic field are simultaneously present and inseparable. This characteristic implies that electromagnetic radiation exhibits which fundamental nature?
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Correct answer: B — Wave nature
Electromagnetic radiation is fundamentally a transverse wave, meaning the electric and magnetic fields oscillate in space and are inseparable components of the wave phenomenon.
Q12. For a given frequency of radiation, the energy carried by the radiation is determined solely by the constant value of Planck's constant (h) and the frequency itself. This emphasizes the quantization of energy in the form of:
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Correct answer: B — Packets or quanta
The quantization of energy means that energy is absorbed or emitted in discrete packets or quanta, which are the photons corresponding to specific frequencies.
Q13. If the frequency of an electromagnetic wave is doubled, how does its wavelength change, assuming the speed of light remains constant?
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Correct answer: B — It is halved
Since c = λν, if frequency (ν) is doubled, the wavelength (λ) must be halved to keep the product constant.
Q14. In the context of wave mechanics, what is the fundamental relationship that connects the energy of a photon to the frequency of the radiation it represents?
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Correct answer: C — E = hf
The energy of a photon is determined by Planck's equation, E = hf, where h is Planck's constant and f is the frequency.
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