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According the Werner's theory.
$(1)$ Ligands are connected to the metal ions by covalent bonds.
$(2)$ Secondary valencies have directional properties
$(3)$ Secondary valencies are non-ionisable
Of these statements :
Product $(A)$ is
Assertion $(A)$ : The first ionization enthalpy of $3 d$ series elements is more than that of group $2$ metals
Reason $(R)$ : In $3d$ series of elements successive filling of d-orbitals takes place.
In the light of the above statements, choose the correct answer from the options given below :
| List $I$ | List $II$ | ||
| $A$ | $\alpha$-Glucose and $\alpha-$Galactose | $I$ | Functional isomers |
| $B$ | $\alpha$-Glucose and $\beta-$-Galactose | $II$ | Homologous |
| $C$ | $\alpha$-Glucose and $\alpha$-Galactose | $III$ | Anomers |
| $D$ | $\alpha$-Glucose and $\alpha$-Galactose | $IV$ | Epimers |
Choose the correct answer from the options given below:
(Given molar mass in $\mathrm{g} \mathrm{mol}^{-1}{CaCO}_3: 100, \mathrm{MgCO}_3: 84)$
$MnO _{4}^{-}+8 H ^{+}+5 e ^{-} \rightarrow Mn ^{2+}+4 H _{2} O , E ^{\circ}=1.51 V$
The quantity of electricity required in Faraday to reduce five moles of $MnO _{4}^{-}$ is ..... .