Coordinate Compound Mock Exam-15 -

Coordinate Compound Mock Exam-15

Question No:1

The complex ion which has no ‘d’ electrons in the central metal atom is:

[A] [Co(NH3)6] 3+
[B] [Fe(CN) 6] 3–
[C] [Cr(H2O) 6] 3+
[D] [MnO4]

Question No:2

Oxidation number of Fe in violet coloured complex Na4 [Fe(CN)5(NOS) is:

[A] 0
[B] 2
[C] 3
[D] 4

Question No:3

Complexes [Co(NH3)5SO4]Br and [Co(NH3)5Br]SO4can be distinguished by

[A] conductance measurement
[B] using BaCl2
[C] using AgNO3
[D] all

Question No:4

Amongst the following ions, which one has the highest paramagnetism?

[A] [Cr(H2O) 6] 3+
[B] [Fe(H2 O) 6] 2+
[C] [Zn(H2O) 6] 2+
[D] [Cu(H2O) 6] 2+

Question No:5

Ni(CO)4and [Ni(NH3)4]2+ do not differ in

[A] magnetic moment
[B] (C) geometry
[C] (B) oxidation number of Ni

Question No:6

Which of the following statements is not correct?

[A] Ti(NO3)4is a colourless compound
[B] [Cr(NH3)6)]Cl3is a coloured compound
[C] K3[VF6] is a colourless compound
[D] [Cu(NCCH3)4]BF4 is a colourless compound

Question No:7

The geometry of Ni(CO)4and [Ni(P Ph3)2Cl2] are

[A] both square planar
[B] tetrahedral and square planar
[C] both tetrahedral
[D] square planar and tetrahedral

Question No:8

Of the following which is diamagnetic in nature?

[A] [CoF6 ] 3–
[B] [NiCl 4] 2–
[C] [CuCl 4] 2–
[D] [Ni(CN) 4] 2–

Question No:9

The [Fe(CN)6]3– complex ion

[A] exhibits planar geometry
[B] (C) should be very stable
[C] (B) is diamagnetic
[D] has 2 unpaired electrons

Question No:10

50 ml of 0.2 M solution of a compound with empirical formula CoCl3.4NH3on treatment with excess of AgNO3(aq) yields 1.435 g of AgCl. Ammonia is not removed by treatment with concentrated H2SO4.The formula of the compound is:

[A] Co(NH3)4Cl3
[B] [Co(NH3)4Cl2]Cl
[C] [Co(NH3)4Cl3
[D] [CoCl3(NH3)]NH3

Question No:11

In the process of extraction of gold,
Roasted gold ore +CN + H2O (\x right arrow{o2} [x] + OH [x] + Zn —> [y] + Au [x] and [y] are:

[A] [x] = [Au(CN) 2], [y] = [Zn(CN) 4] 2–
[B] [x] = [Au(CN) 4] 3–, [y] = [Zn(CN) 4 ] 2–
[C] [x] = [Au(CN) 2] , [y] = [Zn(CN) 6] 4–
[D] [x] = [Au(CN) 4 ] , [y] = [Zn(CN) 4] 2–

Question No:12

Which of the following is non–conducting?

[A] CoCl3.6NH3
[B] CoCl3.5NH3
[C] CoCl3.4NH3
[D] CoCl3.3NH3

Question No:13

Aqueous solution of FeSO4gives tests for both Fe2+ and SO 2-4 but after addition of excess of KCN, solution ceases to give test for Fe2+.This is due to the formation of

[A] the double salt FeSO4.2KCN.6H2O
[B] Fe(CN)3]3–
[C] the complex ion [Fe(CN) 6] 4–
[D] the complex ion [Fe(CN) 6]3-

Question No:14

Which of the following statement(s) is/are correct with reference to Fe2+ and Fe3+ ions?
Fe3+ gives brown colour with potassium ferricyanide
Fe2+ gives blue colour with potassium ferricyanide
Fe3+ gives red colour with potassium thiocyanate
Fe2+ gives brown colour with ammonium thiocyanate

[A] 1, 2
[B] 1, 4
[C] 1, 2, 3
[D] all of these

Question No:15

The number of sigma bonds in Ziese’s salt is:

[A] 4
[B] 6
[C] 8
[D] none of these