Which of the following statements is true about the voltaic cell?

Give the symbolic representation of the galvanic cell obtained by using the following standard reduction potentials at $298 \ K$ and calculate its standard cell potential $(E^o_{cell})$.
$(i)$ $E^o_{Ag^{+}|Ag} = 0.80 \ V$
$(ii)$ $E^o_{Zn^{2+}|Zn} = -0.76 \ V$

Which of the following statements is correct?

In the electrochemical cell $H_{2(g)}, 1 \ atm \ | \ H^+_{(aq)}, 1 \ M \ || \ Cu^{2+}_{(aq)}, 1 \ M \ | \ Cu_{(s)}$,which of the following statements is true?

In batteries and fuel cells,which energy is converted into which energy?

The following limiting molar conductivities are given as:
$\lambda_{m(H_{2}SO_{4})}^{0} = x \ S \ cm^{2} mol^{-1}$
$\lambda_{m(K_{2}SO_{4})}^{0} = y \ S \ cm^{2} mol^{-1}$
$\lambda_{m(CH_{3}COOK)}^{0} = z \ S \ cm^{2} mol^{-1}$
The $\lambda_{m}^{0} \ (\text{in } S \ cm^{2} mol^{-1})$ for $CH_{3}COOH$ will be: