Coordination Compounds

Which of these statements about [Co(CN)6]3- is true?

1. [Co(CN)6]3- has four unpaired electrons and will be in a high-spin configuration.
2. [Co(CN)6]3- has no unpaired electrons and will be in a high-spin configuration.
3. [Co(CN)6]3- has no unpaired electrons and will be in a low-spin configuration.
4. [Co(CN)6]3- has four unpaired electrons and will be in a low-spin configuration.

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is

1. [Mn(H2O)6]3+
2. [Fe(H2O)6]3+
3. [Co(H2O)6]2+
4. [Co(H2O)6]3+

Which of the following complexes is used as an anticancer agent?

1. mer-[Co(NH3)3Cl3]
2. cis-[PtCl2(NH3)2]
3. cis-K2[PtCl2Br2]
4. Na2CoCl4

A magnetic moment of 1.73 BM will be shown by one among the following

1. TiCl4
2. [CoCl6]4-
3. [Cu(NH3)4]2+
4. [Ni(CN)4]2-

An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be

1. 0.003
2. 0.01
3. 0.001
4. 0.002

Crystal field splitting energy for high spin d4 octahedral complex is

1. -1.2 o
2. -0.6 o
3. -0.8 o
4. -1.6 o

In a particular isomer of [Co(NH3)4Cl2]+, the Cl-Co-Cl angle is 90 , this isomer is known as

1. optical isomer
2. cis-isomer
3. position isomer
4. linkage isomer.

The anion of acetylacetone (acac) forms Co (acac)3 chelate with Co3+. The rings of the chelate are

1. five membered
2. four membered
3. six membered
4. three membered.

The correct IUPAC name for [CrF2(en)2]Cl is

1. chloro difluorido ethylene diaminechromium (III) chloride
2. difluoridobis (ethylene diamine) chromium (III) chloride
3. difluorobis-(ethylene diamine) chromium (III) chloride
4. chloro difluoridobis (ethylene diamine) chromium (III)

Which among the following is a paramagnetic complex?

1. [Co(NH3)6]3+
2. [Pt(en)Cl2]
3. [CoBr4]2-
4. Mo(CO)6