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

MCQ 41
Atoms of two different elements having same nucleon number but different proton number are called
A. Isotopes
B. Isotones
C. Isobars
D. Isoelectronic

Answer: C

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MCQ 42
 A di-valent cation having 10 electrons and 24 nucleon number. The number of neutrons are
A. 11
B. 12
C. 10
D. 24

Answer: B

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MCQ 43
An unknown element having electronic configuration [Ne] 3s2, 3p3 can form
A. Uni-negative ion
B. Tri-Negative ion
C. Di-Positive ion
D. Uni-Positive ion

Answer: B

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MCQ 44
The ______ shapes of orbitals quantum number explains the
A. Principal
B. Magnetic
C. Azimuthal
D. Spin

Answer: C

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MCQ 45
 Which of following violates Hund’s rule
A. 1s², 2s², 2px¹, 2py¹, 2pzo
B. 1s², 2s², 2px², 2py0, 2pz0
C. 1s², 2s², 2px², 2py2, 2pz2
D. 1s², 2s¹

Answer: B

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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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