d- and f- Block Elements  MCQs

MCQs of d- and f- Block Elements

Showing 151 to 158 out of 158 Questions
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151.
Which of the following alloys is useful in preparation of stones of gas lighter ?
(a) Nitinol
(b) Nichrome
(c) Pyrophoric misch
(d) Cupronickel
Answer:

Option (c)

152.
Select the pair having highest oxidation states in its metallic compounds/ions.
(a) MnO2, FeCl3
(b) MnO4-, CrO2Cl2
(c) [Fe((CN)6]3-, [Co(CN)3]
(d) [NiCl4]2-, [CoCl4]-
Answer:

Option (b)

153.
In which ion is d-d transition observed ?
(a) Cu1+
(b) Zn2+
(c) Mn3+
(d) Sc3+
Answer:

Option (c)

154.
Which of the following is the alloy of iron ?
(a) Stainless steel
(b) Brass
(c) Bronze
(d) Nichrome
Answer:

Option (a)

155.
Which of the following compounds of transition elements is used in dry cell ?
(a) V2O5
(b) KMnO4
(c) K2Cr2O7
(d) MnO2
Answer:

Option (d)

156.
Which of the following elements is radioactive ?
(a) Pr
(b) Pm
(c) Gd
(d) Tm
Answer:

Option (b)

157.
What is the general electronic configuration of actinide series ?
(a) [Xe] 4f0-14 5d0-1 6s2
(b) [Xe] 4f0-14 5d0-10 6s2
(c) [Rn] 5f0-14 5d0-2 6s2
(d) [Rn] 5f0-14 6d0-2 7s2
Answer:

Option (c)

158.
Which of the following statements is incorrect ?
(a) Atoms of all the transition elements are paramagnetic.
(b) All the transition elements are metal elements.
(c) All the elements of d-block are transition elements.
(d) The position of d-block is between s and p-block element in the periodic table.
Answer:

Option (c)

Showing 151 to 158 out of 158 Questions
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