Which one of the following statements concerning lanthanides elements is false
Options
(a) Lanthanides are separated from one another by ion exchange methods (b) The ionic radii of trivalent lanthanides steadily increase with […]
What is the magnetic moment for Mn²⁺ ion in low spin state
Options
(a) 5.90 BM (b) 8.90 BM (c) 2.8 BM (d) 1.73 BM
Correct Answer:
1.73 BM
Explanation:
For Mn²⁺ ion […]
Which of the following is not a transition metal
Options
(a) Cr (b) Mn (c) Sn (d) Cu
Correct Answer:
Sn
Explanation:
No explanation available. Be the first to write the explanation for […]
Which one of the following statements is not true
Options
(a) Variable valencies are shown by the transition elements (b) Electrons enter into the 3d-orbitals in the first series of the transition elements […]
Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential (E⁰ M²⁺/M) value has a positive sign
Options
(a) Co (Z […]
Which one of the following does not correctly represent the correct order of the property indicated against it
Options
(a) Ti < V < Cr < Mn; increasing number of oxidation states (b) […]
Identify the alloy containing a non – metal as a constituent in it
Options
(a) Invar (b) Steel (c) Bell metal (d) Bronze
Correct Answer:
Steel
Explanation:
No explanation available. Be the first […]
Which of the following pairs has the same size
Options
(a) Fe²⁺ , Ni²⁺ (b) Zr⁴⁺ , Ti⁴⁺ (c) Zr⁴⁺ , HF⁴⁺ (d) Zn²⁺ , HF⁴⁺
Correct Answer:
Zr⁴⁺ , HF⁴⁺
Explanation:
No […]
Which one of the elements with the following outer orbital configuration may exhibit the largest number of oxidation states
Options
(a) 3d⁵4s¹ (b) 3d⁵4s² (c) 3d²4s² (d) 3d³4s²
Correct Answer:
3d⁵4s²
Explanation:
Greater […]
Assuming complete ionisation same moles of which of the following compounds will require the least amount of acidified KMnO₄ for complete oxidation
Options
(a) FeSO₃ (b) FeC₂O₄ (c) Fe(NO₂)₂ (d) FeSO₄
Correct Answer: […]
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