1. The first attempt to classify elements was made by
- Mendeleeff
- Newlands
- Lothar Meyer
- Dobereiner
2. Mendeleeff's periodic law is based on
- Atomic number
- Atomic weight
- Number of neutrons
- None of these
3. In the modern periodic table, elements are arranged in
- Increasing mass
- Increasing volume
- Increasing atomic number
- Alphabetically
4. Eka-aluminium and Eka-silicon are known as
- Gallium and Germanium
- Aluminium and Silicon
- Iron and Sulphur
- Proton and Silicon
5. Aluminium is diagonally related to
6. If the valence shell electronic structure for an element is ns²np⁵, this element will belong to the group of
- Alkali metals
- Inert metals
- Noble gases
- Halogens
7. An atom with atomic number 21 belongs to the category of
- s-block elements
- p-block elements
- d-block elements
- f-block elements
8. Chloride of an element A gives neutral solution in water. In the periodic table, the element A belongs to
- First group
- Third group
- Fifth group
- First transition series
9. Which one of the following belongs to representative element of a group in the periodic table?
- Lanthanum
- Argon
- Chromium
- Aluminium
10. The lightest metal is
11. Which of the following is the smallest cation?
12. Which of the following is largest ion?
13. Which of the following is smallest in size?
14. Which of the following is not isoelectronic?
15. Which one is the correct order of the size of the iodine species?
- I⁻ > I > I⁺
- I > I⁺ > I⁻
- I⁺ > I > I⁻
- I⁻ > I⁺ > I
16. The size of the following species increases in the order
- Mg²⁺ < Na⁺ < F⁻ < Al
- F⁻ < Al < Na⁺ < Mg²⁺
- Al < Mg < F⁻ < Na⁺
- Na⁺ < Al < F⁻ < Mg²⁺
17. Al³⁺ has a lower ionic radius than Mg²⁺ because
- Mg atom has less number of neutrons than Al
- Al³⁺ has a higher nuclear charge than Mg²⁺
- Their electronegativities are different
- Al has a lower ionisation potential than Mg atom
18. The energy required to remove an electron of a gaseous atom from its ground state is called
- Potential energy
- Ionization energy
- Electrode potential
- Activation energy
19. Which of the following elements will have the lowest first ionisation energy?
20. The first ionisation energy of lithium will be
- Greater than Be
- Less than Be
- Equal to that of Na
- Equal to that of F
21. Which of the following electronic configuration corresponds to an element having lowest ionisation energy?
- 1s², 2s²2p⁶
- 1s², 2s²2p⁶, 3s¹
- 1s², 2s²2p¹
- 1s¹, 2s²2p³
22. Which has maximum first ionization potential?
23. Which has lowest first ionization potential?
24. Which has the highest second ionisation potential?
- Nitrogen
- Carbon
- Oxygen
- Fluorine
25. Which one of the following elements has the highest ionisation energy?
- [Ne]3s²3p¹
- [Ne]3s²3p²
- [Ne]3s²3p³
- [Ar]3d¹⁰4s²4p¹
26. Which of the following order is correct for ionisation energy?
- B < Be < C < O < N
- B < Be < C < N < O
- B < Be < N < C < O
- Be > B > C > N > O
27. The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is
- C < N > O > F
- O > N > F > C
- O > F > N > C
- F > O > N > C
28. Of the following elements, which one has the highest electronegativity?
29. Which of the following is the most electronegative?
- Oxygen
- Chlorine
- Fluorine
- Nitrogen
30. The electronegativity of Be is same as that of
31. Which of the following represents the electronic configuration of d-block elements?
- (n-1)s² nd¹⁻¹⁰
- (n-1)d⁰⁻¹⁰ns⁰
- (n-1)d¹⁻¹⁰ ns²np
- (n-1)p⁰⁻¹⁰ns
32. Which one of the following elements has the maximum electron affinity?
33. Electron affinity depends on
- Atomic size
- Nuclear charge
- Atomic number
- Atomic size and nuclear charge both
34. Elements of which group form anions most readily?
- Oxygen family
- Nitrogen group
- Halogens
- Alkali metals
35. Oxidizing action increases from top to bottom in the following order
- Cl < Br < I < F
- Cl < I < Br < F
- I < F < Cl < Br
- I < Br < Cl < F
36. Which is the weakest base among NaOH, Ca(OH)₂, KOH and Zn(OH)₂?
37. Variable valency is generally exhibited by
- Transition elements
- Gaseous elements
- Non-metals
- s-Block elements
38. Paramagnetism is exhibited by molecules
- Not attracted in a magnetic field
- Containing only paired electrons
- Carrying a positive charge
- Carrying unpaired electrons
39. Which of the following ion is paramagnetic?
- Zn²⁺
- Ni²⁺
- Cu²⁺
- None of these
40. Which of the following shows highest magnetic moment?
41. Variable valency is due to
- Lone pair effect
- Inert pair effect
- High melting point
- High boiling point
42. Which one of the following electronic configuration is not possible?
- 1s¹, 2s²2p²
- 1s², 2s²2p²
- 1s¹, 2s¹2p¹
- 1s², 2s⁵
43. One would expect proton to have very large
- Ionization potential
- Radius
- Hydration energy
- Charge
44. In the long form of the periodic table all the non-metals are placed in
- s-block
- p-block
- d-block
- f-block
45. The long form of periodic table is based on
- Shape of the atom
- Mass of the atom
- Atomic number of the atom
- Electronegativity
46. The correct order of first ionization potential of the elements is
- Na > Mg > Al
- Mg > Na > Al
- Al > Mg > Na
- Mg > Al > Na
47. Which of the following has maximum ionisation potential?
48. With reference to ionization potential which one of the following sets is correct?
- Li > K < Cs
- B > Li > K
- Cs > Li > B
- Cs < Li < K
49. Highest ionization potential is shown by
- Alkali metals
- Transition elements
- Halogens
- Inert gases
50. The atomic radius of elements of which of the following series should be nearly the same?
- Na, K, Rb, Cs
- Li, Be, B, C
- Fe, Co, Ni, Cu
- F, Cl, Br, I
51. The decreasing order of the size of the following ions is
- Li⁺ > H⁺ > H
- H⁺ > H > Li⁺
- F⁻ < O²⁻ < N³⁻
- Fe³⁺ < Fe²⁺ < Fe⁴⁺
52. The correct order of radii is
- N < Be < B
- Na < Li < K
- Na < Li < K
- Li < Na < K
53. Which has the smallest size?
54. Which one of the following represents the correct order of size?
- Na < Mg < K
- P < Cl < B
- O²⁻ < F⁻ < Mg²⁺
- I⁻ < Br⁻ < Cl⁻
55. On going from right to left in a period in the periodic table, the electronegativity of the elements
- Increases
- Decreases
- Remains unchanged
- Decreases first then increases
56. The correct order of electron affinity of B, C, N and O is
- O > C > N > B
- B > N > C > O
- O > C > B > N
- O > B > C > N
57. Fluorine has low electron affinity than chlorine because of
- Smaller radius of fluorine, high density
- Smaller radius of chlorine, high density
- Bigger radius of fluorine, less density
- Smaller radius of chlorine, less density
58. Which of the following is not paramagnetic?
59. Which of the following is not paramagnetic?
60. Lanthanides contraction is due to increase in
- Shielding by 4f-electrons
- Atomic number
- Effective nuclear charge
- Size of 4f-orbital
61. According to modern periodic law, variations in the properties of elements is related to their
- Atomic weights
- Nuclear weights
- Atomic numbers
- Neutron-proton ratios
62. Increasing order of density is
- Li < Na < K < Rb < Cs
- Li < K < Na < Rb < Cs
- Cs < Rb < K < Na < Li
- K < Li < Na < Rb < Cs
63. The lanthanide contraction is responsible for the fact that
- Zr and Y have about the same radius
- Zr and Nb have similar oxidation states
- Zr and Hf have about the same radius
- Zr and Zn have the same oxidation state
64. Increasing order of electron affinity is
- N < O < Cl < Al
- O < N < Al < Cl
- Al < N < O < Cl
- Cl < N < O < Al
65. Outer electronic configuration of K, Cu and Cr are respectively
- 4s¹, 3d¹⁰, 3d⁵
- 4s¹, 3d¹⁰, 3d¹
- 4s¹, 3d¹, 3d¹
- 4s¹, 3d³, 3d¹
66. Lanthanides and actinides are also called as
- Short periods
- Inner transition elements
- Long periods
- Main transition elements
67. Which of the following sets is of coinage metal?
- Cu, Ag, Au
- Zn, Cd, Hg
- Au, Ag, Zn
- Li, Na, K
68. The group of elements in which the differentiating electron enters the antepenultimate shell are called
- f-block elements
- p-block elements
- s-block elements
- d-block elements
69. Which is not soluble in water?
- PbSO₄
- CuSO₄
- Bi₂(SO₄)₃
- Na₂SO₄
70. Which of the following is second most electronegative element?
- Chlorine
- Oxygen
- Sulphur
- Fluorine
71. In the periodic table, metals usually used as catalysts belong to
- d-block
- f-block
- s-block
- p-block
72. Which is correctly arranged in increasing size?
- F < O < C < Cl < B
- C < O < F < Cl < Br
- Cl < Br < F < C < O
- O < F < C < Cl < Br
73. Ionization energy decreases down the group due to
- Increase in charge
- Increase in atomic size
- Decrease in atomic size
- Decrease in shielding effect
74. Increase in atomic size down the group is due to
- Increase in number of electrons
- Increase in number of protons and neutrons
- Increase in number of protons
- Increase in number of protons, neutrons and electrons
75. The only non-metal which is liquid at room temperature is
76. Lanthanides contraction is due to increase in
- Shielding by 4f-electrons
- Atomic number
- Effective nuclear charge
- Size of 4f-orbital
77. Lanthanides and Actinides are also called as
- Short periods
- Inner transition elements
- Long periods
- Main transition elements
78. In the periodic table, metals usually used as catalysts belong to
- d-block
- f-block
- s-block
- p-block
79. Increase in atomic size down the group is due to
- Increase in number of electrons
- Increase in number of protons and neutrons
- Increase in number of protons
- Increase in number of protons, neutrons and electrons
80. The long form of the periodic table is based on
- Atomic number
- Atomic mass
- Electronic configuration
- Effective nuclear charge
81. The only non-metal which is liquid at room temperature is
