Coordination Compounds · Question 55

Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II). Which of the following statements is not true? [figure]

1. Red complex has a square planar geometry.
2. Complex has symmetrical H-bonding.
3. Red complex has a tetrahedral geometry.
4. Dimethylglyoxime functions as bidentate ligand.

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

1. [Ni(NH3)6]2+
2. [Zn(NH3)6]2+
3. [Cr(NH3)6]3+
4. [Co(NH3)6]3+

Which of the following carbonyls will have the strongest C–O bond?

1. Cr(CO)6
2. Fe(CO)5
3. [Mn(CO)6]+
4. [V(CO)6]-

Which of the following complex compounds will exhibit highest paramagnetic behaviour? (At. No. Ti = 22, Cr = 24, Co = 27, Zn = 30)

1. [Cr(NH3)6]3+
2. [Co(NH3)6]3+
3. [Zn(NH3)6]2+
4. [Ti(NH3)6]3+

Of the following complex ions, which is diamagnetic in nature?

1. [NiCl4]2-
2. [Ni(CN)4]2-
3. [CuCl4]2-
4. [CoF6]3-

The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of isomerism?

1. Linkage isomerism
2. Ionization isomerism
3. Coordination isomerism
4. Geometrical isomerism

The complex, [Pt(Py)(NH3)BrCl] will have how many geometrical isomers?

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

The d-electron configurations of Cr2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour? (At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

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

Which of the following carbonyls will have the strongest C–O bond?

1. Mn(CO)6+
2. Cr(CO)6
3. V(CO)6-
4. Fe(CO)5

Which of the following complex compounds will exhibit highest paramagnetic behaviour?

1. [Ti(NH3)6]3+
2. [Cr(NH3)6]3+
3. [Co(NH3)6]3+
4. [Zn(NH3)6]2+