Chapter 5: Quantum Chemistry Chapter 5: Quantum Chemistry 1. Who was the first s

Question

Chapter 5: Quantum Chemistry Chapter 5: Quantum Chemistry 1. Who was the first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom? Ans: D Difficulty: E 2. Who was the first scientist to propose that an object could emit only certain amounts of energy? A) Planck B) Einstein C) Bohr D) Rydberg E) de Broglie Ans: A Difficulty: E 3. Who proposed a model that successfully explained the photoelectric effect? A) Planck B) Einstein Co Compton D) Rydberg E) Bohr Ans: B Difficulty: E 4. Who developed an empirical equation from which the wavelengths of lines in the spectrum of hydrogen atoms can be calculated? A) Planck B) de Broglie C) Bohr D) Rutherford E Rydberg Ans: E Difficulty: E 5. Which scientist first proposed that the electron in the hydrogen atom can have only certain energies? A) Planck B) Einstein Ans: C Difficulty: E 6. Which scientist first proposed that particles of matter could have wave properties? A Einstein B) Planck C) de Broglie D) Compton E) Heisenberg Ans: C Difficulty: M 7. Which scientist demonstrated that photons transferred momentum during collisions with A) Bohr B) de Broglie C) Planck DO Compton E Billiard Ans: D Difficulty: M 8. Who proposed the principle which states that one cannot simultaneously know the exact position and velocity of a particle? A) Einstein B) Planck CD Heisenberg D) Compton E) de Broglie Ans: C Difficulty: E Page 1

Explanation / Answer

Question 1 to 8 is theoretical and you need to remember the answerd

9)

Rainbow formation is mainly due to dispersion of light

Answer: B

10)

contact lenses can focus because of refraction of light

Answer: C

11)

When light passes through 1 single slit, it gives rise to diffraction

Answer: A

12)

Answer: D

13)

Answer: E

you need to know electromagnetic spectrum for this

I am allowed to answer only 1 question at a time

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