(A) $(i)$ False: Current is defined as the rate of flow of charge,i.e.,$I = Q/t$. The statement incorrectly suggests $I = Q \times t$.
$(ii)$ True: $A$ cell converts chemical energy into electrical energy through internal chemical reactions,which drives the charge flow.
$(iii)$ True: For pure metals,the resistivity increases as temperature rises due to increased collisions between electrons and vibrating ions.
$(iv)$ False: Ohm's law states that the potential difference across a conductor is directly proportional to the current flowing through it $(V \propto I)$,provided temperature remains constant. It does not relate to power.
$(v)$ True: In a series circuit,there is only one path for current,whereas a parallel circuit provides multiple branches for current flow.
$(vi)$ False: Resistance in a wire is primarily due to the collisions of electrons with the atoms/ions of the conductor's lattice,not due to electron-electron repulsion.