d- and f- Block Elements  MCQs

MCQs of d- and f- Block Elements

Showing 81 to 90 out of 158 Questions
6 7 8 9 10 11
81.
Experimental value of magnetic moment for a complex containing Mn2+ to 5.96 BM. This indicates that _____ .
(a) spin motion and orbital motion (revolution) of electrons are in the same direction.
(b) spin motion and orbital motion of electrons are in the opposite direction.
(c) electrons do not execute orbital motion but they execute only orbital motion
(d) electrons do not execute spin motion but they execute only orbital motion
Answer:

Option (a)

82.
An oxide of manganese possesses magnetic moment equal to 4.9 BM. Determine the oxide.
(a) MnO
(b) Mn2O3
(c) Mn2O7
(d) MnO2
Answer:

Option (b)

83.
From TiF62-, CoF63-, Cu2Cl2 and NiCl42-, select the colourless pair.
(a) TiF62- and Cu2Cl2
(b) CoF63- and NiCl42-
(c) TiF62- and CoF63-
(d) Cu2Cl2 and NiCl42-
Answer:

Option (a)

84.
Which of the following ions has highest ionization enthalpy ?
(a) Cr+
(b) Mn+
(c) V+
(d) Sc+
Answer:

Option (a)

85.
Which statement is not suitable for interstitial compounds ?
(a) Chemical bond is formed between metal and non-metal.
(b) The proportion of components is not definite in such compounds.
(c) They are hard due to localization of free electrons.
(d) They are resistant to wear and corrosion.
Answer:

Option (a)

86.
State the component element of German silver alloy.
(a) Ag
(b) Mg
(c) Al
(d) Cu
Answer:

Option (d)

87.
State the percentage of Cr in stainless steel.
(a) 8 %
(b) 18 %
(c) 24 %
(d) 32 %
Answer:

Option (b)

88.
State the percentage of carbon in medium carbon steel ?
(a) 0.2 % to 0.3 %
(b) 0.3 % to 0.6 %
(c) 0.6 % to 1.0 %
(d) More than 1.0 %
Answer:

Option (b)

89.
Which of the following alloys has maximum proportion of Ni ?
(a) Monel metal
(b) Nitinol
(c) Invar
(d) German silver
Answer:

Option (a)

90.
Which of the following alloys is used in electric furnace ?
(a) Invar
(b) Cupronickel
(c) Nichrome
(d) Nitinol
Answer:

Option (c)

Showing 81 to 90 out of 158 Questions
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