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Cobalt(III) chloride forms several octahedral complexes with ammonia. A compound among the following that does not give a test for chloride ions with silver nitrate at 25 °C is:
The existence of two different coloured complexes with the composition of $[Co(NH_3)_4Cl_2]^+$ is due to:
The complex ion that is not expected to absorb visible light is:
A complex ion among the following that can absorb visible light is: (At. no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)
The correct state of hybridisation of C2, C3, C5 and C6 of the hydrocarbon $$ \overset{1}{\text{HC}} \equiv \overset{2}{\text{C}} - \overset{3}{\text{CH}}_2 - \overset{4}{\text{CH}} = \overset{5}{\text{CH}} - \overset{6}{\text{CH}}_3 $$ is in the sequence:
CFSE (in the octahedral field) will be maximum in: (Atomic number Co = 27)
Copper sulphate dissolves in excess of KCN to give:
A pair that contains both the ions coloured in an aqueous solution is: (At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
The correct order of increasing field strength of ligands is:
The IUPAC name of the following complex is: $[Ag(H_2O)_2][Ag(CN)_2]$
Match List-I with List-II: **List-I (Complexes)** (A) $[Co(NH_3)_5NO_2]Cl_2$ and $[Co(NH_3)_5ONO]Cl_2$ (B) $[Cr(NH_3)_6][Co(CN)_6]$ and $[Cr(CN)_6][Co(NH_3)_6]$ (C) $[Co(NH_3)_5(SO_4)]Br$ and $[Co(NH_3)_5Br]SO_4$ (D) $[Cr(H_2O)_6]Cl_3$ and $[Cr(H_2O)_5Cl]Cl_2 \cdot H_2O$ **List-II (Type of isomer)** (I) Ionisation isomerism (II) Coordination isomerism (III) Linkage isomerism (IV) Solvate isomerism Choose the correct answer from the options given below:
The order of energy absorbed, which is responsible for the color of complexes, is: (A) $[Ni(H_2O)_2(en)_2]^{2+}$ (B) $[Ni(H_2O)_4(en)]^{2+}$ (C) $[Ni(en)_3]^{2+}$
Which of the following sets represents a complex and a double salt, respectively?
The correct statement among the following about $[Co(CN)_6]^{3-}$ is :
A magnetic moment of 1.73 BM will be shown by one among the following:
The correct order of the stoichiometries of $AgCl$ formed when $AgNO_3$ in excess is treated with the complexes: $CoCl_3 \cdot 6NH_3$, $CoCl_3 \cdot 5NH_3$, $CoCl_3 \cdot 4NH_3$, respectively, is:
Ethylene diaminetetraacetate (EDTA) ion is :
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $Co^{3+}$ is:
Among them, intensive property is:
Determine $\Delta U$ for the process where, one mole of an ideal gas at $300 \text{ K}$ is expanded isothermally from $1 \text{ L}$ to $10 \text{ L}$ volume: (Use $R = 8.314 \text{ J K}^{-1} \text{ mol}^{-1}$)