Light can be converted into electricity with the help of a ......... .

Match List-$I$ with List-$II$:

List-$I$ (Applications)	List-$II$ (Batteries/Cell)
$A$. Transistors	$I$. Anode $- Zn/Hg$; Cathode $- HgO + C$
$B$. Hearing aids	$II$. Hydrogen fuel cell
$C$. Inverters	$III$. Anode $- Zn$; Cathode $- Carbon$
$D$. Apollo space ship	$IV$. Anode $- Pb$; Cathode $- PbO_2$

Choose the correct answer from the options given below:

For the electrochemical cell,$M|M^{+}||X^{-}|X$,${E^{o}}(M^{+}/M) = 0.44 \ V$ and ${E^{o}}(X/X^{-}) = 0.33 \ V$. From this data,one can deduce that:

One of the commonly used electrodes is the calomel electrode. Under which of the following categories does the calomel electrode fall?

Which of the following substances is used in a dry cell?

For the cell reaction,$Zn + Cu^{2+} \to Zn^{2+} + Cu,$ the cell representation is: