Optical isomerism is exhibited by (ox= oxalate anion; en= ethylenediamine).
cis-[CrCl2(ox)2]3-
[Co(en)3]3+
trans-[CrCl2(ox)2]3-
[Co(ox)(en)2]+
In a mixture, two enantiomers are found to be present in 85% and 15% respectively. The enantiomeric excess (ee) is
85%
15%
70%
60%
In the Lassaigne's test for the detection of nitrogen in an organic compound, the appearance of blue coloured compound is due to
ferric ferricyanide
ferrous ferricyanide
ferric ferrocyanide
ferrous ferrocyanide
C.
ferric ferrocyanide
To a part of sodium extract, FesO4 solution is added and the contents are warmed. A few drops of FeCl3 solution are then added and resulting solution is acidified with cone. HCl. The appearance of bluish green or Prussian blue colouration confirms the presence of nitrogen. The reactions that occur during this test are as
2NaCN + FeSO4 → Na2SO4 + Fe(CN)2
Fe(CN)2 + 4NaCN → Na4[Fe(CN)6]
3Na4[Fe(CN)6] + 4FeCl3 → Fe4[Fe(CN)6]3 + 12NaCl
Extraction of gold (Au) involves the formation of complex ions X and Y.
Gold ore HO- + X Y + Au
X and Y respectively are
Au(CN) and Zn(CN)
Au(CN) and Zn(CN)
Au(CN) and Zn(CN)
Au(CN) and Zn(CN)
The atomic number of cerium (Ce) is 58. The correct electronic configuration of Ce3+ ion is
[Xe]4f1
[Kr]4f1
[Xe]4f13
[Kr]4d1
Sulphuryl chloride (SO2Cl2) reacts with white phosphorus (P4) to give
PCl5, SO2
OPCl3, SOCl2
PCl5, SO2, S2Cl2
OPCl3, SO2, S2Cl2
For the reaction A +2B → C, the reaction rate is doubled, if the concentration of A is doubled. The rate is increased by four times when concentrations of both A and B are increased by four times. The order of the reaction is
3
0
1
2
Cold ferrous sulphate solution on absorption of NO develops brown colour due to the formation of
paramagnetic [Fe(H2O)5(NO)]SO4
dimagnetic [Fe(H2O)5(NO)]SO4
paramagnetic [Fe(H2O)5(NO3)][SO4]2
diamagnetic [Fe(H2O)4(SO4)]NO3
Suppose the mass of a single Ag-atom is m. Ag metal crystallises in fcc lattice with unit cell of length a. The density of Ag metal in terms of a and m is