10th Physical Science Bit Bank

61. As most of the elements in group 17 (VII A) are obtained from nature as sea salt, they are called as
A) alkali metal family B) chalcogen family
C) halogen Family D) noble gases

62. Actinoids are from …………. to …………..
A) 90Th to 103Lr B) 58Ce to 71Lu
C) 37Rb to 54Xe D) 31Ga to 36Kr

63. Group I (I A) from Li to Fr with outer shell electronic configuration ns1 is called
A) Boron family B) Alkali metal family
C) Oxygen family D) Nitrogen family

64. Group 14 (IV A) family is called
A) Oxygen family B) Nitrogen family
C) Carbon family D) Boron family

65. Valency of Calcium is
A) 1 B) 2 C) 3 D) 4

66. Valency of Chlorine is
A) 8 B) 7 C) 2 D) 1

67. Electronic configuration of valence shell of any two elements in a given period
is ………….
A) same B) constant C) not same D) none

68. The number of positive charges (protons) in the atom of an element is called the …………. of the element.
A) atomic weight B) atomic strength C) atomic number D) atomic mass

69. …………. block of elements contains metals, non-metals and metalloids also.
A) s B) p C) f D) d

70. Electron affinity of Fluorine is
A) -295 kJ mol-1 B) -349 kJ mol-1 C) -200 kJ mol-1 D) -328 kJ mol-1

Answers:

51-C; 52-C; 53-D; 54-A; 55-B; 56-C; 57-A; 58-B; 59-A; 60-C; 61-C; 62-A; 63-B; 64-C; 65-B; 66-D; 67-C; 68-C; 69-B; 70-D.

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.