Classification of Elements, Periodic Table and Periodicity in Properties

Solved Practice Questions and MCQ Test Series – Set 3 (Q.No 21-30)

Fully solved practice questions (MCQ Test Series) for study and exam-preparation of all Medical and Dental Entrance Exams, Engineering Entrance Exams; JEE, Admission Tests and other competitions.

Syllabus / Randomly selected Topics:

Genesis of Periodic Classification, Earlier Attempts of Classification of Elements, Mendeleev’s Periodic Law and Original Periodic Table, Modern Periodic Law and Long Form of Periodic Table, (Modified Form of Mendeleev’s Periodic Table), Naming the Elements, Periodic Table of Elements (Long Form representing Electron Configurations), Position of an Element on the Basis of Electronic Configuration, Nomenclature of Elements with Atomic Number > 100, Electronic Configurations of Elements and the Periodic Table, Periodic Trends in Properties of Elements or Atomic Properties or Periodic Properties of Elements, The Screening Effects or Shielding Effect, Effective Nuclear Charge, Ionisation Enthalpy or Ionisation Potential, Atomic Radii, Ionic Radii, Ionization Enthalpy, Electron Gain Enthalpy, Electron Affinity, Electronegativity, Valence, Electronic Configurations and Types of Elements: s, p, f-Blocks

Chemistry: Classification of Elements, Periodic Table and Periodicity in Properties

Fully Solved Multiple Choice Questions – Set 3 (Q. No. 21-30)

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Question 21: An element of atomic mass 40 has 2, 8, 8, 2 as the electronic configuration. Which one of the following statements regarding this element is not correct?

a. It forms an amphoteric oxide b. It belongs to IIA group

c. It belongs to IV period d. It has 20 neutrons

Question 22: Which of the following has the greatest electron affinity?

a. I b. Br c. F d.Cl

Question 23: The triad not present in Group VII of Mendeleev’s table

a. Li, Na, K b. Fe, Co, Ni c. Ru, Rh, Pd d. Os, Ir, Pt

Question 24: Correct order of radii

a. Na > Mg > Al b. Na⁺> Mg²⁺> Al³⁺

c. I⁺< I < I^- d. All of these

Question 25: If ionisation energy of an atom is 10 eV & EA is 6.8 eV electronegativity of the species on Pauling scale.

a. 4 b. 3 c. 2 d. 1

Question 26: The first ionisation energy will be maximum for:

a. Be b. He c. Li d. Fe

Question 27: The first ionisation enthalpies of four consecutive elements present in the second period of the periodic table are 8.3, 11.3, 14.5 and 13.6 eV respectively. Which one of the following is the first ionisation enthalpy of nitrogen?

a. 13.6 b. 14.5 c. 11.3 d. 8.3

Question 28: Correct order of 1ionisation potential among following elements Be, B, C, N, O is

a. B < Be < C < O < N b. B < Be < C < N < O

c. Be < B < C < N < O d. Be < B < C < O < N

Question 29: One of the following groups is not found in the Mendeleev’s periodic table

a. Zero b. I c. VII d. VIII

Question 30: Which pair of elements has the same characteristic chemical properties?

a. Z = 13, Z = 22 b. Z = 3, Z = 11

c. Z = 4, Z = 24 d. Z = 2, Z = 4

Also See

Classification of Elements, Periodic Table and Periodicity in Properties

Hint & Solutions of Test Series Questions Set 3 (Q. No. 21 - 30)