Chemistry Practice Questions I with Answers

Chemistry Practice Questions I with Answers
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1) A type of energy embodied in oscillating electric and magnetic fields is called

  • A) infrared radiation.
  • B) microwave radiation.
  • C) magnetism.
  • D) electricity.
  • E) electromagnetic radiation.

2) The vertical height of a wave is called

  • A) wavelength.
  • B) amplitude.
  • C) frequency.
  • D) area.
  • E) median.

 

3) The number of cycles that pass through a stationary point is called

  • A) wavelength.
  • B) amplitude.
  • C) frequency.
  • D) area.
  • E) median.

4) The distance between adjacent crests is called

  • A) wavelength.
  • B) amplitude.
  • C) frequency.
  • D) area.
  • E) median.

5) Which of the following visible colors of light has the highest frequency?

  • A) green
  • B) red
  • C) blue
  • D) yellow
  • E) orange

6) Which of the following visible colors of light has the longest wavelength?

  • A) blue
  • B) green
  • C) yellow
  • D) red
  • E) violet

7) Which of the following colors of electromagnetic radiation has the shortest wavelength?

  • A) blue
  • B) violet
  • C) orange
  • D) green
  • E) yellow

8) Which of the following types of electromagnetic radiation has the lowest frequency?

  • A) yellow
  • B) blue
  • C) orange
  • D) green
  • E) purple

9) A sunburn is caused by overexposure to ________ radiation.

  • A) ultraviolet
  • B) gamma
  • C) microwave
  • D) x-ray
  • E) radio

10) ________ is/are used to image bones and internal organs.

  • A) Ultraviolet light
  • B) Gamma rays
  • C) Microwaves
  • D) X-rays
  • E) Radio waves

11) When waves of equal amplitude from two sources are out of phase when they interact, it is called

  • A) destructive interference.
  • B) diffraction.
  • C) constructive interference.
  • D) effusion.
  • E) amplitude.

12) When waves of equal amplitude from two sources are in phase when they interact, it is called

  • A) destructive interference.
  • B) diffraction.
  • C) constructive interference.
  • D) effusion.
  • E) amplitude.

13) Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz.

  • A) 229 nm
  • B) 436 nm
  • C) 206 nm
  • D) 485 nm
  • E) 675 nm

14) Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 × 1014 Hz.

  • A) 2.75 × 10-19 J
  • B) 3.64 × 10-19 J
  • C) 5.46 × 10-19 J
  • D) 1.83 × 10-19 J
  • E) 4.68 × 10-19 J

15) Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm.

  • A) 1.46 × 1014 s-1
  • B) 6.86 × 1014 s-1
  • C) 4.33 × 1014 s-1
  • D) 6.17 × 1014 s-1
  • E) 1.62 × 1014 s-1

16) Determine the shortest frequency of light required to remove an electron from a sample of Ti metal if the binding energy of titanium is 3.14 × 103 kJ/mol.

  • A) 7.87 × 1015 Hz
  • B) 4.74 × 1015 Hz
  • C) 2.11 × 1015 Hz
  • D) 1.27 × 1015 Hz
  • E) 6.19 × 1015 Hz

17) What total energy (in kJ) is contained in 1.0 mol of photons, all with a frequency of 2.75 × 1014 Hz?

  • A) 182 kJ
  • B) 219 kJ
  • C) 457 kJ
  • D) 326 kJ
  • E) 110 kJ

18) Calculate the wavelength of an electron (m = 9.11 × 10-28 g) moving at 3.66 × 106 m/s.

  • A) 1.99 × 10-10 m
  • B) 5.03 × 10-10 m
  • C) 1.81 × 10-10 m
  • D) 5.52 × 10-9 m
  • E) 2.76 × 10-9 m

19) Calculate the wavelength of a baseball (m = 155 g) moving at 32.5 m/s.

  • A) 7.60 × 10-36 m
  • B) 1.32 × 10-34 m
  • C) 2.15 × 10-32 m
  • D) 2.68 × 10-34 m
  • E) 3.57 × 10-32 m

20) Determine the velocity of a medicine ball (m = 10.0 kg) with a wavelength of

1.33 × 10-35 m.

  • A) 8.81 m/s
  • B) 12.3 m/s
  • C) 2.21 m/s
  • D) 4.98 m/s
  • E) 6.44 m/s

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