5. Co-ordination chemistry - CBSE STD 12 Science Chemistry Questions

Given below are two statements :

Statement I: Both $\left[\mathrm{Co}\left(\mathrm{NH}_3\right) 6\right]^{3+}$ and $\left[\mathrm{CoF}_6\right]^3$ complexes are octahedral but differ in their magnetic behaviour.

Statement II: $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)\right]^{3+}$ is diamagnetic whereas $\left[\mathrm{CoF} \mathrm{F}_6\right]^{3-}$ is paramagnetic.

In the light of the above statements, choose the correct answer from the options given below:

A
Both Statement $I$ and Statement $II$ are false
B
Statement $I$ is true but Statement $II$ is false
C
Statement $I$ is false but Statement $II$ is true
✓
Both Statement $I$ and Statement $II$ are true

Answer: D.

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Q 2M.C.Q (1 Marks)1 Mark

Match List $I$ with List $II$.

List I (Complex)	List $II$ (Type of isomerism)
$A$. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{NO}_2\right)\right] \mathrm{Cl}_2$	$I$. Solvate isomerism
$B$. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{SO}_4\right)\right] \mathrm{Br}$	$II$. Linkage isomerism
$C$. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]\left[\mathrm{Cr}(\mathrm{CN})_6\right]$	$III$. Ionization isomerism
$D$. $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$	$IV$. Coordination isomerism

Choose the correct answer from the options given below:

A
$A-I, B-III, C-IV, D-II$
B
$A-I, B-IV, C-III, D-II$
C
$A-II, B-IV, C-III, D-I$
✓
$ A-II, B-III, C-IV, D-I$

Answer: D.

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Q 3M.C.Q (1 Marks)1 Mark

Given below are two statements :

Statement I : $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ is a homoleptic complex whereas $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$is a heteroleptic complex.

Statement II : Complex $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ has only one kind of ligands but $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$has more than one kind of ligands.

In the light of the above statements, choose the correct answer from the options given below.

A
Both Statement $I$ and Statement $II$ are false
B
Statement $I$ is true but Statement $II$ is false
C
Statement $I$ is false but Statement $II$ is true
✓
Both Statement $I$ and Statement $II$ are true

Answer: D.

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Q 4M.C.Q (1 Marks)1 Mark

Which complex compound is most stable?

A
$\left[ Co \left( NH _3\right)_6\right]_2\left( SO _4\right)_3$
B
$\left[ Co \left( NH _3\right)_4\left( H _2 O \right) Br \right]\left( NO _3\right)_2$
C
$\left[ Co \left( NH _3\right)_3\left( NO _3\right)_3\right]$
✓
$\left[ CoCl _2(\text { en })_2\right] NO _3$

Answer: D.

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Q 5M.C.Q (1 Marks)1 Mark

Which complex compound is most stable?

A
$\left[ Co \left( NH _3\right)_6\right]_2\left( SO _4\right)_3$
B
$\left[ Co \left( NH _3\right)_4\left( H _2 O \right) Br \right]\left( NO _3\right)_2$
C
$\left[ Co \left( NH _3\right)_3\left( NO _3\right)_3\right]$
✓
$\left[ CoCl _2(\text { en })_2\right] NO _3$

Answer: D.

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5. Co-ordination chemistry questions

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5. Co-ordination chemistry Chemistry - 5. Co-ordination chemistry

5. Co-ordination chemistry question types

5. Co-ordination chemistry questions

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