26. Moseley analysed ………….
A) band spectrum B) line spectrum
C) characteristic pattern of X- rays D) #-ray spectrum
27. This period is incomplete in the periodic table.
A) 2nd period B) 4th period C) 6th period D) 7th period
Also Read – Questions from 1 – 25
28. Modern periodic table has ………….
A) 7 periods, 18 groups B) 18 periods, 7 groups
C) 8 groups, 8 periods D) 18 periods, 8 groups
29. s – block elements will have the electronic configuration.
A) ns2 and np4 B) ns1 and ns2
C) np6 and nd4 D) ns2 and np6
30. This is a metal
A) Copper B) Chlorine C) Bromine D) Hydrogen
31. The name of 101st element is ………….
A) Indium B) Thallium C) Mendelevium D) Flarovium
32. Law of octaves holds good only up to
A) Magnesium B) Calcium C) Strontium D) Barium
33. The energy required to remove an electron from the outer most orbit of a neutral gaseous atom is
A) electronegativity B) electropositivity
C) enthalpy D) ionization energy
34. Number of elements present in 1st period
A) 2 B) 8 C) 18 D) 32
35. In the periodic table metals are on …………. side.
A) right B) left C) top D) bottom
36. …………. are anomalous pair of elements in Mendeleev’s periodic table.
A) Tellurium, Iodine B) Sodium, Lithium
C) Beryllium, Magnesium D) Copper, Zinc
37. Vertical columns of Mendeleev’s periodic table are called
A) Periods B) Transition elements
C) Block elements D) Groups
38. Electronegativity of an element is the average value of its ionization energy and
electron affinity. This was proposed by
A) Millikon B) Boyle C) Lavoisier D) Louis Proust
39. d – block elements (except Zn group) are known as
A) Inner transition elements B) Transition elements
C) Representative elements D) Actinoids
40. Both Lanthanides and Actinides are
A) d- block elements B) s- block elements
C) f- block elements D) p- block elements
41. ‘The physical and chemical properties of the elements are the periodic functions of their atomic numbers’. This is
A) Mendeleev’s periodic law B) Law of octaves
C) Modern periodic law D) Moseley’s periodic law
42. ‘The physical and chemical properties of the elements are the periodic functions of their electronic configuration’. This is
A) Modern periodic law B) Moseley’s periodic law
C) Mendeleev’s periodic law D) All the above
43. Electronegative values of elements ………… as we go down in a group.
A) Increase B) Decrease
C) Remain constant D) First increases and then decreases
44. Electronegative values of elements ………… as we go along a period from left to right.
A) Increase B) Decrease
C) Remain constant D) None of the above
45. Non – metals are generally ………. due to their smaller atomic radii.
A) Less electronegative B) not electronegative
C) More electronegative D) None of the above
46. Metals generally show ………. electronegative character.
A) more B) less C) constant D) zero
47. Electron gain enthalpy values ………. as we go down in a group.
A) increase B) decrease
C) remains constant D) may increase or decrease
48. 1 pico meter = ……….
A) 10-10 m B) 10-11 m C) 10-12 m D) 10-6 m
49. Atomic radius is measured in
A) cm B) m C) pm D) nm
50. The unit of ionization energy is …………
A) kJ mol-1 B) kJ C) J mol-1 D) kJ mol
Answers:
26-C; 27-D; 28-A; 29-B; 30-A; 31-C; 32-B; 33-D; 34-A; 35-B; 36-A; 37-D; 38-A; 39-B; 40-D; 41-D; 42-A; 43-B; 44-A; 45-C; 46-B; 47-B; 48-C; 49-C; 50-A.