Coordination Compounds - Quiz 7

Coordination Compounds Quiz-7

Dear Readers,

JEE Advanced is a high level exam that checks your concept by putting various types of questions. The questions are in a different format from JEE mains, herein the questions are : single correct multiple choice questions, multiple correct multiple choice questions, statement based questions and comprehension type questions..

Q1. 
Select the correct statement

•  Chelation effect is maximum for five or six-membered rings
•  Complex ions in which ligands can be interchanged rapidly are said to be labile
•  Both (a) and (b) are correct
•  None of the above is correct

Solution
(c)

Q2. 
IUPAC name of is K_4 [Fe(CN)_6 ] is

•  Potassium hexacyano iron (II)
•  Potassium iron (II) hexacyano
•  Tetrapotassium iron (II) hexacyano
•  Potassium hexacyanoferrate (II)

Solution
(d)
+2
↓
K_4 [Fe(CN)_6]
Cation anion

Q3. Among Ni(CO)_4∙[Ni(CN)_4 ]^(2-) and NiCl_4^(2-)

•  Ni(CO)_4and[Ni(CN)_4 ]^(2-) diamagnetic andNiCl_4^(2-) is paramagnetic
•  Ni(CO)_4and NiCl_4^(2-)are diamagnetic and[Ni(CN)_4 ]^(2-) are paramagnetic
•  Ni(CO)_4is diamagnetic and[Ni(CN)_4 ]^(2-)and NiCl_4^(2-) are paramagnetic
•  NiCl_4^(2-)and[Ni(CN)_4 ]^(2-)are diamagnetic and Ni(CO)_4 is paramagnetic

Solution
(a)
Ni(CO)_4 sp^3 diamagnetic
[Ni(CN)_4 ]^(2-) dsp^2 diamagnetic
[NiCl_4 ]^(2-) sp^3 paramagnetic

Q4. Cu^(2+ ) and Cd^(2+)are distinguished through formation of complex [Cu(CN)_4 ]^(3-) and [Cs(CN)_4 ]^(2-) , when H_2 S gas is passed

•  There is yellow precipitate due to CdS
•  There is yellow precipitate due to CdS
•  There is blue precipitation due to CuS
•  There is precipitation of CuS and CdS togetherr

Solution
(a)
[Cu(CN)_4 ]^(3-) is stable, does not ionize
[Cd(CN)_4 ]^(2-) is unstable, ionizes to form Cd^(2+), thus CdS is precipitated

Q5.Which one of the following complex species does not obey the EAN rule?

•  [Cu(CN)_4 ]^(3-)
•  [Cr(NH_3 )_6 ]^(3+)
•  [Fe(CN)_6 ]^(4-)
•  [Ni(CO)_4]

Solution
(b) EAN rule is not followed in which EAN of metal ≠ EC of nearest inert gas

Q6. Zeisse’s salt is

•  [Pt(NH_3 )_2 Cl_2]
•  K[PtCl_3 (C_2 H_4 )]
• Fe(C_5 H_5 )_2
•  None of these

Solution
(b)

Q7.[Co(NO_2 ) (NH_3 )_5 ]^(2+) is yellow in colour, then its linkage isomer is

•  Yellow
•  Red
•  Blue
•  orange

Solution
(b)

Q8.Select the correct statement

•  Excess of copper and iron are removed by the chelating ligands D-penicillamine and desferrioxime B via the formation of coordination compounds
•  Cis-platin is used in the treatment of cancer
•  Both (a) and (b) are correct
•  None of the above is correct

Solution
(c)

Q9.[Fe^(II ) (O_2 ) (CN)_4 Cl]^(4- )is named as

•  Chlorotetracyanodioxoferrate (II) ion
•  Chlorotetracyanodioxoferrate (II) ion
•  Chlorotetracyanosuperoxoferrate (II) ion
•  None of the above is correct

Solution
(c)
[Fe(O_2 ) (CN)_4 (Cl)]^(4-)
↑ ↓ ↓ ↓
+2 2x -4 -1 =-4
Thus, oxygen is as superoxo

Q10. When concentrated HClis added to a, solution of [Co(H_2 O)_6 ]^(2+) ion, an intense blue colour develops due to the formation which one of the following

•  [CoCl_6 ]^(4-)
•  [CoCl_4 ]^(2-)
•  [CoCl_2 (H_2 O)_4]
• [CoCl(H_2 O)_5 ]^+

Solution
(a)
[Co(H_2 O)_6 ]^(2+)+6Cl^-→[CoCl_6 ]^(4+)+6H_2 O
Cl^- replaces H_2 Oligands and intense blue colour is developed