Coordination Compounds · Question 19

Consider a mixture 'X' which is made by dissolving 0.4 mol of [Co(NH3)5SO4]Br and 0.4 mol of [Co(NH3)5Br]SO4 in water to make 4 L of solution. When 2 L of mixture 'X' is allowed to react with excess of AgNO3, it forms precipitate 'Y'. The rest 2 L of mixture 'X' reacts with excess BaCl2 to form precipitate 'Z'. Which of the following statements is CORRECT?

1. 0.1 mol of 'Y' is formed.
2. 0.4 mol of 'Z' is formed.
3. 0.2 mol of 'Z' is formed.
4. 'Y' is BaSO4 and 'Z' is AgBr.

The wavelengths of light absorbed for the following complexes are in the order (I) [Co(NH3)6]3+ ; (II) [Co(H2O)6]3+ ; (III) [Co(CN)6]3- ; (IV) [Co(NH3)5(H2O)]3+ ; (V) [CoF6]3-

1. III < IV < I < II < V
2. III < I < IV < V < II
3. III < I < IV < II < V
4. III < I < II < IV < V

A chromium complex with a formula CrCl3 6H2O has a spin only magnetic moment value of 3.87 BM and its solution conductivity corresponds to 1 : 2 electrolyte. 2.75 g of the complex solution was initially passed through a cation exchanger. The solution obtained after the process was reacted with excess of AgNO3. The amount of AgCl formed in the above process is g. (Nearest integer) [Given: Molar mass in g mol-1 Cr : 52, Cl : 35.5, Ag : 108, O : 16, H : 1]

The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are : Choose the correct answer from the options given below :

1. C and E Only
2. A, D and B Only
3. B, C and E Only
4. C and D Only

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

1. Both Statement I and Statement II are false
2. Both Statement I and Statement II are true
3. Statement I is false but Statement II is true
4. Statement I is true but Statement II is false

The crystal field stabilisation energy of [Co(oxalate)3]3- complex is 'n' times that of the [Cr(oxalate)3]3- complex. Here 'n' is . (Assume o P)

Identify the CORRECT set of details from the following : Choose the correct answer from the options given below :

1. C & D Only
2. A, C & E Only
3. A, B, C, D & E
4. A, B & D Only

Total number of unpaired electrons present in the central metal atoms/ions of [Ni(CO)4], [NiCl4]2-, [PtCl2(NH3)2], [Ni(CN)4]2- and [Pt(CN)4]2- is .

Consider the transition metal ions Mn3+, Cr3+, Fe3+ and Co3+ and all form low spin octahedral complexes. The correct decreasing order of unpaired electrons in their respective d-orbitals of the complexes is

1. Cr3+ > Mn3+ > Fe3+ > Co3+
2. Mn3+ > Fe3+ > Co3+ > Cr3+
3. Fe3+ > Co3+ > Mn3+ > Cr3+
4. Cr3+ > Fe3+ > Co3+ > Mn3+

A first row transition metal (M) does not liberate H2 gas from dilute HCl. 1 mol of aqueous solution of MSO4 is treated with excess of aqueous KCN and then H2S(g) is passed through the solution. The amount of MS (metal sulphide) formed from the above reaction is mol.

1. 1
2. 2
3. 0
4. 3