The equation which is balanced and represents the correct product$(s)$ is:

  • A
    $Li_2O + 2KCl \rightarrow 2LiCl + K_2O$
  • B
    $[CoCl(NH_3)_5]^{2+} + 5H^{+} \rightarrow Co^{2+} + 5NH_4^+ + Cl^{-}$
  • C
    $[Mg(H_2O)_6]^{2+} + (EDTA)^{4-} \rightarrow [Mg(EDTA)]^{2-} + 6H_2O$
  • D
    $CuSO_4 + 4KCN \rightarrow K_2[Cu(CN)_4] + K_2SO_4$

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The correct option$(s)$ regarding the complex $[Co(en)(NH_3)_3(H_2O)]^{3+}$ $(en = H_2NCH_2CH_2NH_2)$ is (are):
$A$. It has two geometrical isomers
$B$. It will have three geometrical isomers if bidentate 'en' is replaced by two cyanide ligands
$C$. It is paramagnetic
$D$. It absorbs light at longer wavelength as compared to $[Co(en)(NH_3)_4]^{3+}$

Match List-$I$ with List-$II$ and select the correct option:
List-$I$List-$II$
$(A). [Ag(CN)_2]^-$$1. \text{Square planar, } 1.73 \, B.M.$
$(B). [Cu(CN)_4]^{3-}$$2. \text{Linear, } 0 \, B.M.$
$(C). [Cu(CN)_6]^{4-}$$3. \text{Octahedral, } 0 \, B.M.$
$(D). [Cu(NH_3)_4]^{2+}$$4. \text{Tetrahedral, } 0 \, B.M.$
$(E). [Fe(CN)_6]^{4-}$$5. \text{Octahedral, } 1.73 \, B.M.$

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$CuSO_{4(aq)}$ $\xrightarrow{H_2S \uparrow} M \downarrow$ $\xrightarrow[\text{Excess}]{KCN} N + O$
Then final products $N$ and $O$ are respectively.

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Identify the correct set from the following table:

Total number of molecules/species from the following which will be paramagnetic is $........$
$O_2, O_2^{+}, O_2^{-}, NO, NO_2, CO, K_2[NiCl_4], [Co(NH_3)_6]Cl_3, K_2[Ni(CN)_4]$

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