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1.

Assertion (A) Complexes of `MX_(6)` and `MX_(5)L` type (X and L are unidentate) do not show geometrical isomerism. Reason (R) Geometrical isomerism is not shown by complexes of coordination number 6.A. Assertion and reason both are true, reason is correct explanation of assertion.B. Assertion and reason both are true but reason is not the correct explanation of assertion.C. Assertion is true, reason is false.D. Assertion is false, reason is true.

Answer» Correct Answer - B
Assertion and reason both are correct and reason is not correct explanation of assertion.
Complexes of `MX_(6)` and `MX_(5)L` type (X and L are unidentate) do not show geometrical isomerism due to presence of plane of symmetry and necessary condition for showing geometrical isomerism is that complex is must of `MA_(4)B_(2)` type or `[M (AB)_(2) X_(2)]` type
Discussion
2.

Calculate the EAN of central atom in the following complexes `(a) [Cr(CO)_(6)]" "(b) [Fe(CN)_(6)]^(4-)" " (c ) [Fe(CO)_(5)] " " (d) [Co(NH_(3))_(6)]^(3+)` `(e ) [Ni(CO)_(4) " " (f) [Cu(CN)_(4)]^(3-)" "(g)[Pd(NH_(3))_(6)]^(4+)" " (h) [PtCl_(6)]^(2-)`

Answer» Correct Answer - (a) 36 (b)36 ( c)36 (d) 36 ( e) 36 ( f) 36 (g)54 (h)86
Discussion
3.

Assertion : Tetrahedral complexes having two different types of unidentate ligands coordinated with central metal ion will show geometrical isomerism . Reason : Geometrical isomerism arises in homoleptic complexes due to different possible geometric arrangement of the ligands .A. If both Assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. if both assertion and reason are false

Answer» Correct Answer - D
Tetrahedral complexes do not show geometrical isomerism because relative positions of the unidentate ligands attached to the central metal atom are same with respect to each other . This type of isomerism arises in heteroleptic complexes.
Discussion
4.

Match the complexes given in column I with the oxidation states of central metal atoms given in column II and mark the appropriate choice . A. `(A) to (ii) , (B) to (i) , (C) to (iv) , (D) to (iii) `B. `(A) to (iv ) , (B) to (ii) , (C) to (i) , (D) to (iii)`C. `(A) to (iii) , (B) to (iv) , (C) to (ii) , (D) to (i) `D. `(A) to (i) , (B) to (ii) , (C) to (iii) , (D) to (iv)`

Answer» Correct Answer - C
Discussion
5.

Match the column I with the column II and mark the appropriate choice . A. `(A) to (ii) , (B) to (iii) , (C) to (i) , (D) to (iv) `B. `(A) to (i) , (B) to (iii) , (C) to (ii) , (D) to (iv)`C. `(A) to (iii) , (B) to (i) , (C) to (iv) , (D) to (ii)`D. `(A) to (i) , (B) to (iv) , (C) to (ii) , (D) to (iii)`

Answer» Correct Answer - C
Discussion
6.

Draw all the isomers (geometrical and optical) of: (i) `[CoCl_(2)(en)_(2)]^(+)` (ii) `[Co(NH_(3))Cl(en)_(2)]^(2+)` (iii) `[Co(NH_(3))_(2)Cl_(2)(en)]^(+)`

Answer»
Discussion
7.

Find the sum of number of geometrical isomers for following complexes. `(a) [CoCl_(2)Br_(2)]^(2-) " " (b) [Rh(en)_(3)]^(3+) " " ( c) [Cr(en)_(2)Br_(2)]^(+)` `(d)[Pt en Cl_(2)] " " ( e) [Co(NH_(3))_(3)(NO_(2))_(3)]`

Answer» Correct Answer - 4(0+0+2+0+2=4)
Discussion
8.

The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are:A. B. C. D.

Answer» Correct Answer - D
Discussion
9.

IUPAC name of `[Pt(NH_(3))_(2)Cl(NO_(2))]` isA. platinum diaminechloronitriteB. chloronitrito-N-ammineplatinum (II)C. diamminechloridonitrito-N-platinum (II)D. diamminechloronitrito-N-platinate (II)

Answer» Correct Answer - C
Discussion
10.

Three arrangement are shown for the complex , `[Co(en) (NH_(3))_(2) Br_(2)]^(+)` . Which one is the wrong statement ? A. I and II are geometrical isomersB. II and III are optical isomersC. I and III are optical isomersD. II and III are geometrical isomers .

Answer» Correct Answer - B
Discussion
11.

In the process of extraction of gold, Roasted gold ore `+CN^(-)+H_2Ooverset(o_2)rarr[X]+OH^(-)` `[X]+Znrarr[Y]+Au` Identify the complexes [X] and [Y]A. (a) `X=[Au(CN)_2]^(-), Y=[Zn(CN)_4]^(2-)`B. (b) `X=[Au(CN)_4]^(3-), Y=[Zn(CN)_4]^(2-)`C. (c) `X=[Au(CN)_2]^(-), Y=[Zn(CN)_6]^(4-)`D. (d) `X=[Au(CN)_4]^(-), Y=[Zn(CN)_4]^(2-)`

Answer» Correct Answer - A
Roasted gold are `+CN^(-)+H_2Ooverset(O_2)rarr[Au(CN)_2]^(-)+OH`
`[Au(CN)_2]^(-)+Znrarr[Zn(CN)_4]^(2-)`.
Discussion