KENDRIYA VIDYALAYA TATANAGAR
ACADEMIC YEAR 2022-23
CLASS-XII CHEMISTRY
1
2
3
4
5
6
7
8
9
10
11
12
Write two point of difference between double salt and
coordination compounds.
What is meant by the chelate effect? Give an example.
Can the oxidation state of transition metal may be zero. Support
your answer. What is the denticity of EDTA3-?
Give reasons(i) CO forms more stable complex.
(ii) Chelate ligands form more stable complex than unidentate
ligands.
(iii) Low spin tetrahedral complexes are rarely observed.
(iv) Square planar complexes with CN of 04 exhibit geometrical
isomerism whereas tetrahedral complexes donot.
What is crystal field splitting energy? Mention two factors on
which crystal field splitting energy depends?
Write the nature of bonding in coordination compounds according
to VBT & CFT and write two demerits of each theory.
What is meant by didentate and ambidentate ligands? Give two
examples for each.
Write down the C.No, O.No and number of ions in aqueous
medium for each of the following complexes. Also write IUPAC
name.
(i) K[Cr(H2O)2(C2O4)2].3H2O (iii) Co(NH3)6Cl2 (v) K4[Mn(CN)6]
(ii) [Co(NH3)5Cl-]Cl2
(iv) Cs[FeCl4 (vi) (NH4)2[CoF4]
A coordination compound CrCl3⋅4H2O precipitates silver chloride
when treated with silver nitrate. The molar conductance of its
solution corresponds to a total of two ions. Write structural
formula of the compound and name it.
Write the hybridization and magnetic behavior of the following
complexes(i) [Fe(CN)6]4- (ii) [CoF6]3- (iii) [Ni(CO)4]
CoSO4Cl.5NH3 exists in two isomeric forms ‘A’ and ‘B’. Isomer ‘A’
reacts with AgNO3 to give white precipitate, but does not react
with BaCl2. Isomer ‘B’ gives white precipitate with BaCl2 but does
not react with AgNO3. Answer the following questions.
(i) Identify ‘A’ and ‘B’ and write their structural formulas.
(ii) Give the IUPAC name of ‘A’ and ‘B’.
(iii) Name the type of ionization involved.
Show crysral field splitting in octahedral complex. Write elec.
conf. on basis of CFT of d1 to d10 in presence of strong and weak
ligand.
2
2
2
2
2
2
3
3
2
3
3