ExamBro
Web Login Download App
ExamBro
Download App
COMEDK · Chemistry · 23. d and f Block Elements

Match the compounds given in Column I with their characteristic features listed in Column II

No.Column INo.Column II
A\(La(OH)_3\)PAcidic in nature
B\(Mn_2O_7\)QLeast basic
C\(Lu(OH)_3\)RInterstitial compound
D\(Fe_3H\)SMost basic

  1. A \(\begin{array}{llll}
    \mathrm{A}=\mathrm{Q} & \mathrm{B}=\mathrm{P} & \mathrm{C}=\mathrm{S} & \mathrm{D}=\mathrm{R}
    \end{array}\)
  2. B \(\mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{P} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{R}\)
  3. C \(\mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{P}\)
  4. D \(\begin{array}{llll}
    \mathrm{A}=\mathrm{R} & \mathrm{B}=\mathrm{P} & \mathrm{C}=\mathrm{S} & \mathrm{D}=\mathrm{Q}
    \end{array}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{P} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{R}\)

Step-by-step Solution

Detailed explanation

The basicity of lanthanoid hydroxides \(\mathrm{Ln}(\mathrm{OH})_3\) decreases as the ionic radius of the lanthanoid ion \(\mathrm{Ln}^{3+}\) decreases due to lanthanoid contraction. \(\mathrm{La}^{3+}\) has the largest ionic radius, making \(\mathrm{La}(\mathrm{OH})_3\) the…
Same subject

More questions from Chemistry

Explore more questions on app
From COMEDK

More PYQs from COMEDK

Explore more questions on app