p-Block Elements  MCQs

MCQs of p-Block Elements

Showing 61 to 70 out of 173 Questions
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61.
State the number of unpaired e- in sulphur ?
(a) 2
(b) 6
(c) 8
(d) 1
Answer:

Option (a)

62.
In which allotropic form of sulphur, the rings have crown shape ?
(a) Rhombic
(b) Monoclinic
(c) Plastic
(d) Non-crystalline or amorphous
Answer:

Option (a)

63.
On which of the following factors does the stability of interhalogen compounds depend ?

(I) On difference of volumes of combining halogens.

(II) On difference of the values of electronegativity of combining halogens.

(III) On difference of basicity of combining halogens.

(IV) On difference of stability of combining halogens.

(a) (I) and (III)
(b) (I) and (II)
(c) (II) and (III)
(d) (I) and (IV)
Answer:

Option (b)

64.
What is the composition of bleaching powder ?
(a) Ca (OCl)2 . Ca (OH)2
(b) CaOCl . CaCl2 . Ca (OH)2
(c) Ca (OCl)2 . CaCl2 . Ca (OH)2 . 2H2O
(d) CaOCl . CaCl2 . 2H2O
Answer:

Option (c)

65.
What is aqua regia ?
(a) 3 parts conc. HCl + 1 part conc. HNO3
(b) 2 parts conc. HCl + 2 parts conc. HNO3
(c) 1 part conc. HCl + 3 parts conc. HNO3
(d) None of the above
Answer:

Option (a)

66.
Which complex ion is obtained when platinum reacts with aqua regia ?
(a) [PtCl6]2-
(b) PtCl4-
(c) [PtCl6]2+
(d) PtCl4-2
Answer:

Option (a)

67.
What are the physical state, colour and shape of BrF5 ?
(a) Gas, colourless, bent T-shaped
(b) Liquid, colourless, square pyramidal
(c) Gas, colourless, square pyramidal
(d) Liquid, yellow green, bent T-shaped
Answer:

Option (b)

68.
What type of hybridization is involved in iodine pentafluoride ?
(a) sp3d2
(b) dsp3
(c) sp3d
(d) d2sp3
Answer:

Option (a)

69.
What is the only oxoacid formed by fluorine ?
(a) HFO
(b) HFO2
(c) HFO3
(d) HFO4
Answer:

Option (a)

70.
Which acid can be isolated in pure state ?
(a) HClO4
(b) HClO3
(c) HClO2
(d) HClO
Answer:

Option (d)

Showing 61 to 70 out of 173 Questions
4 5 6 7 8 9