d- and f- Block Elements  MCQs

MCQs of d- and f- Block Elements

Showing 131 to 140 out of 158 Questions
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131.
Which of the following elements is not considered as the transition element even though it is of d- block ?
(a) Zn
(b) Cd
(c) Hg
(d) All the given
Answer:

Option (d)

132.
What is the colour of NiCl2·6H2O compound ?
(a) Blue
(b) Green
(c) Pink
(d) Colourless
Answer:

Option (b)

133.
Which of the following ions possesses magnetic moment equal to that of Ni3+ ion ?
(a) Mn3+
(b) Cr3+
(c) Fe3+
(d) Cu2+
Answer:

Option (b)

134.
Which of the following ions possesses the property of diamagnetism ?
(a) Cr4+
(b) Ti4+
(c) Mn4+
(d) Co3+
Answer:

Option (b)

135.
Which of the following reasons is not correct for formation of complex compounds of transition metal ions ?
(a) As the d-orbitals are vacant in transition metal ions, the electron pairs coming from ligand can be accommodated.
(b) Transition metal ions possess different oxidation states.
(c) The ionic size of transition metal ions is large.
(d) As there is much less difference between energy values of 3d, 4s, 4p and 4d - orbitals, different types of hydrobridization between these orbitals are possible.
Answer:

Option (c)

136.
Which of the following is not an interstitial compound ?
(a) Fe3N
(b) Fe3C
(c) Fe2O3
(d) Cr3C2
Answer:

Option (c)

137.
The transition metals can form alloys easily because their _____ .
(a) atomic number are almost same
(b) atomic mass numbers are almost same
(c) atomic sizes are almost same
(d) electronic configuration is almost same
Answer:

Option (d)

138.
Which of the following elements is not present in the interstitial void in interstitial compounds ?
(a) N
(b) P
(c) C
(d) B
Answer:

Option (b)

139.
Which of the following alloys is used for the preparation of electric resistant wire ?
(a) German silver
(b) Nichrome
(c) Brass
(d) Bronze
Answer:

Option (b)

140.
Mention the percentage composition of silver in German silver ?
(a) 0%
(b) 1%
(c) 5%
(d) 50%
Answer:

Option (a)

Showing 131 to 140 out of 158 Questions
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