Ammonia forms the complex with copper ions in alkaline solution but not in acidic solution . The reason for this is :
(a) In alkaline solution is precipitated which is soluble in excess of alkali
(b) Copper hydroxide is amphoteric substance
(c) In acidic solution hydration protects ions
(d) In acidic solution protons are coordinated with ammonia molecules forming ions
The magnetic moment of a complex ion is 2.83 BM. The complex ion is:
1. \([V(H_{2}O)_{6}]^{3+}\)
2. \([Cr(H_{2}O)_{6}]^{3+}\)
3. \([Cu(CN)_{4}]^{2-}\)
4. \([Mn(Cl)_{4}]^{2-}\)
Which of the following complex compound(s) is/are paramagnetic and low spin?
(I)
(II)
(III)
(IV)
Choose the correct code :
(1) I only (2) II and III (3) I and IV (4) IV only
Among the following pairs of complexes , in which case the value is higher fir the first one ?
(1)
(2)
(3)
(4)
Dimethyl glyoxime forms a square planar complex with . The complex should be:
(1) diamagnetic
(2) paramagnetic having 1 unpaired electron
(3) paramagnetic having 2 unpaired electron
(4) ferromagnetic
What is the magnetic moment (spin only) and hybridisation of the brown ring complex ?
(1)
(2)
(3)
(4)
Aqueous solution of Ni2+ contains [Ni(H2O)6]2+ and its magnetic moment is 2.83 BM. When ammonia is added in it, the magnetic moment of solution:
1. Will remain the same.
2. Will increase from 2.83 BM.
3. Will decrease from 2.83 BM.
4. Cannot be predicted theoretically.
Which of the following is true about the complex ?
(1) It exhibits geometrical isomerism
(2) It is a paramagnetic complex
(3) Its geometry is a tetrahedron
(4) Platinum is hybridized