Periodic Table NEET Questions PDF – Solved MCQs
Periodic Table NEET Questions PDF
Que 1. Identify the correct order of the size of the following:
(a) Ca2+ < K+ < Ar < Cl– < S2–
(b) Ar < Ca2+ < K+ < Cl– < S2–
(c) Ca2+ < Ar < K+ < Cl– < S2–
(d) Ca2+ < K+ < Ar < S2– < Cl–
Ans 1. (a) Ca2+ < K+ < Ar < Cl– < S2–
For isoelectronic species, the size of anion increases as the negative charge increases whereas the size of cation decreases with an increase in positive charge. Further ionic radii of anions are more than that of cations. Thus, the correct order is Ca2+ < K+ < Ar < Cl– < S2–
Que 2. Element A belongs to Group VIIA in the p-block and element B belongs to Group I in the s-block of the periodic table. Out of the following assumptions, the correct one is:
(a) A and B are metals
(b) A and B are non-metals
(c) A is metal and B is a non-metal
(d) A is a non-metal and B is a metal
Ans 2. (d) A is a non-metal and B is a metal
Que 3. Increasing order of atomic weights was violated (anomalous pairs) in the case of
(a) Te, I
(b) Ar, K
(c) Co, Ni
(d) All
Ans 3. (d) All
Que 4. Identify the incorrect match.
Name IUPAC Official Name
(A) Unnilunium (i) Mendelevium
(B) Unniltrium (ii) Lawrencium
(C) Unnilhexium (iii) Seaborgium
(D) Unununnium (iv) Darmstadtium
(a) (A), (i)
(b) (B), (ii)
(c) (C), (iii)
(d) (D), (iv)
Ans 4. (d) (D), (iv)
Unnilunium – Mendelevium ⇒ (a) – (i)
Unniltrium – Lawrencium ⇒ (b) – (ii)
Unnilhexium – Seaborgium ⇒ (c) – (iii)
Unununnium – Roentgenium ⇒ (d) – (iv)
Que 5. According to modern periodic law, the physical and chemical properties of elements are the periodic functions of their
(a) Density
(b) Atomic Number
(c) Mass Number
(d) Atomic Mass
Ans 5. (b) Atomic Number
Que 6. The long form of the periodic table is based on
(a) Atomic volume
(b) Atomic mass
(c) Electronic configuration
(d) Effective nuclear charge
Ans 6. (c) Electronic configuration
The long form of the periodic table is based on the electronic configuration of elements, i.e. Bohr-Bury concept.
Que 7. The fifth period of the modern periodic table includes
(a) 8 elements
(b) 18 elements
(c) 32 elements
(d) unknown elements
Ans 7. (b) 18 elements
Que 8. In which of the following electronic configuration does an atom has the lowest ionization enthalpy?
(a) 1s2 2s2 2p3
(b) 1s2 2s2 2p5 3s1
(c) 1s2 2s2 2p6
(d) 1s2 2s2 2p5
Ans 8. (b) 1s2 2s2 2p5 3s1
Que 9. The screening effect of ‘d’ electrons is
(a) Much less than s-electrons
(b) Much more than s-electrons
(c) Equal to s-electrons
(d) Equal to p-electrons
Ans 9. (a) Much less than s-electrons
Order of screening effect s > p > d > f
Que 10. The wrong statement among the following is
(a) Mendeleev arranged the elements in a tabular form according to increasing atomic weight.
(b) One of the defects in Mendeleev’s periodic table is the position of lanthanides.
(c) the Maximum number of groups in Bohr’s periodic table is 18.
(d) Elements with similar chemical properties occur only within the same period.
Ans 10. (d) Elements with similar chemical properties occur only within the same period.
Que 11. The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?
(a) Carbon family, [Rn] 5f14 6d10 7s2 7p2
(b) Oxygen family, [Rn] 5f14 6d10 7s2 7p4
(c) Nitrogen family, [Rn] 5f14 6d10 7s2 7p6
(d) Halogen family, [Rn] 5f14 6d10 7s2 7p5
Ans 11. (a)
The electronic configuration of the element with Z = 114 (Flerovium) is [Rn] 5f14 6d10 7s2 7p2. Hence, it belongs to the carbon family which has the same outer electronic configuration.
Que 12. The highest electropositive element in the periodic table is
(a) Cs
(b) Rb
(c) K
(d) Na
Ans 12. (a) Cs
Que 13. Elements having similar outer shell electronic configurations in their atoms are arranged in
(a) Groups
(b) Vertical columns
(c) Families
(d) All of these
Ans 13. (d) All of these
Que 14. In the sixth period, the orbitals being filled are
(a) 5s, 5p, 5d
(b) 6s, 6p, 6d, 6f
(c) 6s, 5f, 6d, 6p
(d) 6s, 4f, 5d, 6p
Ans 14. (d) 6s, 4f, 5d, 6p
Que 15. Which one of the following ionic species has the greatest proton affinity to form a stable compound?
(a) NH2–
(b) F–
(c) I–
(d) HS–
Ans 15. (a) NH2–
Proton affinity decreases in moving across the period from left to right due to an increase in charge, within a group the proton affinities decrease from top to bottom. Nitrogen family > Oxygen family > Halogens
Que 16. The electronegativity of the following elements increases in the order
(a) C, N, Si, P
(b) N, Si, C, P
(c) Si, P, C, N
(d) P, Si, N, C
Ans 16.
Que 17. In the transition elements, the incoming electron occupies (n – 1)d sublevel in preference to
(a) np
(b) ns
(c) (n – 1)d
(d) (n + 1)s
Ans 17. (a) np
Que 18. Which of the following oxides is most acidic in nature?
(a) MgO
(b) BeO
(c) BaO
(d) CaO
Ans 18. (b) BeO
In metals, on moving down the group, metallic character increases, so basic nature increases hence most acidic will be BeO.
Que 19. The correct order of ionic radii of the species N3–, O2–, Na+, and F– is
(a) Na+ < F– < O2– > N3–
(b) F– < O2– < N3– > Na+
(c) O2– < N3– < F– > Na+
(d) N3– < Na+ < F– > O2–
Ans 19. (a) Na+ < F– < O2– > N3–
Que 20. The group of elements in which the differentiating electron enters in the anti-penultimate shell of atoms are called
(a) f-block elements
(b) p-block elements
(c) s-block elements
(d) d-block elements
Ans 20. (a) f-block elements
Que 21. The atomic numbers of elements of the lanthanide series lie in the range of
(a) 58 to 71
(b) 57 to 70
(c) 59 to 72
(d) 56 to 69
Ans 21. (a) 58 to 71
Que 22. The stability of + 1 oxidation state increases in the sequence:
(a) Tl < In < Ga < Al
(b) In < Tl < Ga < Al
(c) Ga < In < Al < Tl
(d) Al < Ga < In < Tl
Ans 22. (d) Al < Ga < In < Tl
The stability of +1 oxidation state increases from aluminium to thallium i.e. Al < Ga < In < Tl
Que 23. Electronic configurations of four elements A, B, C, and D are given below:
(A) 1s2 2s2 2p6
(B) 1s2 2s2 2p4
(C) 1s2 2s2 2p6 3s1
(D) 1s2 2s2 2p5
Which of the following is the correct order of increasing tendency to gain electrons?
(a) A < C < B < D (b) A < B < C < D (c) D < B < C < A (d) D < A < B < C
Ans 23. (c) D < B < C < A
Que 24. In which of the following options the order of arrangement does not agree with the variation of the property indicated against it?
(a) I < Br < Cl < F (increasing electron gain enthalpy)
(b) Li < Na < K < Rb (increasing metallic radius)
(c) Al3+ < Mg2+ < Na+ < F– (increasing ionic size)
(d) B < C < N < O (increasing first ionisation enthalpy
Ans 24. a, d
The correct order of increasing negative electron gain enthalpy is I < Br < F < Cl due to electron-electron repulsion in small-sized F atom and the correct order of increasing first ionization enthalpy is B < C < O < N due to extra stability of half-filled orbitals in N-atom.
Que 25. The basic strength of the oxides follows the order
(a) Al2O3 > MgO > Na2O
(b) Al2O3 < MgO < Na2O
(c) Na2O3 < MgO > Al3O2
(d) Al2O3 > MgO > Na2O
Ans 25. (b) Al2O3 < MgO < Na2O
Periodic Table NEET Questions PDF
