Free Planck's Quantum Theory MCQs with Answers
24 Planck's Quantum Theory MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Planck's quantum theory states that energy is emitted or absorbed in discrete packets called quanta, with each packet having energy E = hν. It covers the meaning of Planck's constant, the relationship between frequency and wavelength, and how quantisation differs from the classical continuous model of energy.
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24 questions · page 2 of 2
- A. 6.626 x 10^-3 kJs
- B. 6.262 x 10^-3 Js
- C. 6.626 x 10^-34 Js
- D. 6.262 x 10^3 kJs
Explanation: Remember the value of Planck's constant 'h' is 6.626 × 10-34 Js or 6.26 × 10-37 kJs.
Correct answer: 6.626 x 10^-34 Js- A. E = hcv
- B. E = c/v
- C. E = cv
- D. None of these options are correct
Explanation: According to Planck's quantum E = hvE = hc/XE = hc/v
Correct answer: None of these options are correct- A. Releases
- B. Does not radiate
- C. Absorbs
- D. None of these
Explanation: It's because there are only a limited number of stable states an electron in an atom can be in.
Correct answer: Does not radiate- A. hv
- B. ½ mv^2
- C. Mgh
- D. Mc^2
Explanation: The emission or absorption of energy by an atom is represented by: ∆E = hυ Where '∆E' is the energy difference between the initial and…
Correct answer: hv