Online NMDCAT Chemistry Preparation (MCQ-based Lectures + Practice Tests)

MCQ 21
The number of waves per unit length is called
A. Frequency
B. Wave length
C. Wave crust
D. Wave number

Answer: D

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MCQ 22
The quantum of energy is called photon in case of
A. Heat
B. Sound
C. Wave
D. Light

Answer: D

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MCQ 23
S.I units of wave number are
A. m-1
B. m
C. A°
D. nm

Answer: A

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MCQ 24
The ratio between energy and frequency of photon is
A. Wave number of photon
B. Wave length of photon
C. Speed of photon
D. Plank’s constant

Answer: D

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MCQ 25
Number of subshells and orbitals in N-shell are _____and ______ respectively.
A. 4, 4
B. 4, 8
C. 4, 12
D. 4, 16

Answer: D

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This Post Has 6 Comments

    1. Hifsa Pervez October 1, 2022 Reply

      Shapes of orbitals were explained by magnetic or azimuthal quantum number? Answer below the question is given magnetic quantum number but in the explanation video of this question answer is given azimuthal quantum number.

      1. Umair Ali khan October 5, 2022 Reply

        Azimuthal. The discussion has correct answers. Please mention the question number, therefore, it is corrected.

  2. Haseeb UR Rehman July 26, 2022 Reply

    In ethanol and methanol, which has greater hydrogen bonding?

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