List-I | List-II | ||
|---|---|---|---|
| (A) | Cd(s)+2Ni(OH)3(s)→CdO(s)+2Ni(OH)2(s)+H2O(l) | (I) | Primary battery |
| (B) | Zn(Hg)+HgO(s)→ZnO(s)+Hg(l) | (II) | Discharging of secondary battery |
| (C) | 2PbSO4(s)+2H2O(l)→Pb(s)+PbO2(s)+2H2SO4(aq) | (III) | Fuel cell |
| (D) | 2H2(g)+O2(g)→2H2O(l) | (IV) | Charging of secondary battery |
Choose the correct answer from the options given below:
From the given options the correct answer is option (C): (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
Method used for separation of mixture of products (B and C) obtained in the following reaction is: 
Let \( \alpha = \dfrac{-1 + i\sqrt{3}}{2} \) and \( \beta = \dfrac{-1 - i\sqrt{3}}{2} \), where \( i = \sqrt{-1} \). If
\[ (7 - 7\alpha + 9\beta)^{20} + (9 + 7\alpha - 7\beta)^{20} + (-7 + 9\alpha + 7\beta)^{20} + (14 + 7\alpha + 7\beta)^{20} = m^{10}, \] then the value of \( m \) is ___________.