p-Block Elements  MCQs

MCQs of p-Block Elements

Showing 81 to 90 out of 173 Questions
6 7 8 9 10 11
81.
By decay of which compound, ammonia is produced ?
(a) CH3NH2
(b) NH2CONH2
(c) CH3CONH2
(d) C6H5NH2
Answer:

Option (b)

82.
Which promoter is used with FeO in Haber's process ?
(a) K2O
(b) Al2O3
(c) NaNO2
(d) Both (A) and (B)
Answer:

Option (d)

83.
Which of the following not readily reacts with conc. HNO3 ?
(a) Gold
(b) Silver
(c) Copper
(d) Nickel
Answer:

Option (a)

84.
Which one is orthophosphorous acid ?
(a) H3PO3
(b) H3PO4
(c) H5P3O10
(d) H3PO2
Answer:

Option (a)

85.
Which of the following is a weak diprotic acid ?
(a) H3PO4
(b) H3PO3
(c) H4P2O7
(d) H5P3O10
Answer:

Option (b)

86.
Which form of sulphur is stable at room temperature ?
(a) α - sulphur
(b) β - sulphur
(c) (A) and (B) both
(d) Mono clinic
Answer:

Option (a)

87.
Which of the following does not undergo hydrolysis ?
(a) PbCl4
(b) CCl4
(c) SiCl4
(d) SiF4
Answer:

Option (b)

88.
How many electron pair possesses by 'Xe' in XeF2, XeF4 & XeF6 respectively ?
(a) 2, 1 3
(b) 3, 2, 1
(c) 3, 2, 0
(d) 0, 2, 3
Answer:

Option (b)

89.
Which formula represents polymetaphosphoric acid ?
(a) H3PO4
(b) H6P3O10
(c) (HPO3)n
(d) (HPO2)n
Answer:

Option (c)

90.
The correct formula of the brown ring during the ring test for Nitrate(NO3-) ion is _____
(a) [Fe(H2O)5(NO)]+3
(b) [Fe(H2O)6(NO)]+3
(c) [Fe(H2O)4(NO)2]+3
(d) [Fe(H2O)5(NO)]
Answer:

Option (a)

Showing 81 to 90 out of 173 Questions
6 7 8 9 10 11