CBSE
Multiple Choice QuestionsCobalt (III) chloride forms several octahedral complexes with ammonia, which of the following will not give a test for chloride ions with silver nitrated at 250 C?
CoCl. 3NH3
CoCl. 4NH3
CoCl. 5NH3
CoCl. 5NH3
Among the following complexes, the one which shows zero crystal field stabilisation energy (CFSE) is
[Mn(H2O)6]3+
[Fe(H2O)6]3+
[Co(H2O)6]3+
[Co(H2O)6]3+
Which of the following has longest C-O bond length? (free C-O bond length in CO is 1.128 A0)
[Co(CO)4]-
[Fe(CO)4]-2
[Mn(CO)6]+
[Mn(CO)6]+
Which of the following processes does not involve oxidation of iron?
Rusting of iron sheets
Decolourisation of blue CuSO4 solution by iron
Formation of Fe(CO)5 from Fe
Formation of Fe(CO)5 from Fe
Which of the following paramagnetic?
CO
O2-
CN-
CN-
Which of the following biphenyls is optically active?
Which of the following complexes is used to be as an anticancer agent ?
mer=[Co(NH3)Cl3]
cis-[PtCl2(NH3)2]
cis-K2[PtCl2Br2]
cis-K2[PtCl2Br2]
Which of these statements about [Co(CN)6]3- is true?
[Co(CN)6]3- has no unpaired electrons and will be in a low-spin configuration.
[Co(CN)6]3- has four unpaired electrons and will be in a low-spin configuration
[Co(CN)6]3- has four unpaired electrons and will be in high-spin configuration.
[Co(CN)6]3- has four unpaired electrons and will be in high-spin configuration.
Which of the following compounds will undergo racemization when a solution of KOH hydrolysis?
(i) and (ii)
(iv)
(iii) and (iv)
(iii) and (iv)
(iii) and (iv)
A magnetic moment of 1.73 BM will be shown by one among the following
[Cu(NH3)4]2+
[Ni(CN)4]2-
TiCl4
TiCl4
