How many hydrate isomers are possible for the molecular formula CoCl₃,6H₂O?

1. One

2. Two

3. Three

4. Four

Which of the following complex will show geometrical as well as optical isomerism ?

1. [Pt(NH₃)₂Cl₂]

2. [Pt(NH₃)Cl₃]

3. [Pt(en)₂Cl₂]

4. [Pt(en)₃]⁴⁺

Pick out the correct statement with respect to [Mn(CN)₆]^3-

(1) it is sp³d² hybridised and octahedral

(2) It is sp³d² hybridised and tetrahedral

(3) It is d²sp³ hybridised and octahedral

(4) It is dsp² hybridised and square planar

EAN of Fe in K₃[Fe(CN)₆] is

1. 34

2. 35

3. 36

4. 47

$\mathrm{Out} \mathrm{of} {\mathrm{TiF}}_6^{2-}, {\mathrm{CoF}}_6^{3-}, {\mathrm{Cu}}_2{\mathrm{Cl}}_2 \mathrm{and} {\mathrm{NiCl}}_4^{2-}$ (At. no. Z of Ti = 22, CO = 27, Cu = 29, Ni = 28), the colourless species are

(a) ${\mathrm{TiF}}_6^{2-} \mathrm{and} {\mathrm{CoF}}_6^{3-}$

(b) ${\mathrm{Cu}}_2{\mathrm{Cl}}_2 \mathrm{and} {\mathrm{NiCl}}_4^{2-}$$$

(c) ${\mathrm{TiF}}_6^{2-} \mathrm{and} {\mathrm{Cu}}_2{\mathrm{Cl}}_2$

(d) ${\mathrm{CoF}}_6^{3-} \mathrm{and} {\mathrm{NiCl}}_4^{2-}$

An example of a sigma bonded organometallic compound is

(a) ruthenocene                  (b) Grignard's reagent

(c) ferrocene                      (d) cobaltocene

The correct order of the stoichiometric of AgCl formed when AgNO₃ in excess is treated with the complexes CoCl₃.6NH₃, CoCl₃.5NH₃, and CoCl₃.4NH₃ respectively is:

1. 1 AgCl, 3 AgCl, 2 AgCl
2. 3 AgCl, 1 AgCl, 2 AgCl
3. 3 AgCl, 2 AgCl, 1 AgCl
4. 2 AgCl, 3AgCl,  1 AgCl

The hybridisation involved in complex [Ni(CN)₄]^2- is (Atomic number of Ni = 28)

(1) dsp²                               

(2) sp³

(3) d²sp²                             

(4) d²sp³

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

(1) lonisation isomerism
(2) Coordination isomerism
(3) Geometrical isomerism
(4) Linkage isomerism

Aqueous solution of ${\mathrm{Ni}}^{2+}$ contains ${\left[\mathrm{Ni}({\mathrm{H}}_2\mathrm{O}{)}_6\right]}^{2+}$ and its magnetic moment is 2.83 BM. When ammonia is added in it, comment on the magnetic moment of solution :

(1) It will remain same

(2) It increases from 2.83 BM

(3)  It decreases from 2.83 BM

(4) It cannot be predicted theoretically