Coordination Compounds

Number of possible isomers for the complex [Co(en)2Cl2]Cl will be (en = ethylenediamine)

1. 1
2. 3
3. 4
4. 2

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25 ?

1. CoCl3 5NH3
2. CoCl3 6NH3
3. CoCl3 3NH3
4. CoCl3 4NH3

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.