Fuel cells - class-XI
Description: fuel cells | |
Number of Questions: 20 | |
Created by: Shiva Nambiar | |
Tags: electrochemistry and chemical kinetics chemistry electrochemistry energy |
The overall reaction of a hydrogen-oxygen fuel cell is:
$H _{2}-O _{2}$ fuel cell is:
Hydrogen -Oxygen fuel cells are used in space craft to supply:
In which reactants are not contained within the cell but are continuously supplied from external source?
Which one of the following cells can convert chemical energy of $O _{2}$ and $H _{2}$ directly into electrical energy:
Which of the following statements is true for fuel cells ?
In fuel cell oxidants used are:
The efficiency of a fuel cell is given by:
If a fuel cell methanol is used as fuel and oxygen gas is used as an oxidiser. The reaction is $CH _3OH _{(l)} +\frac{3}{2}O _{2(g)} \rightarrow CO _{2(g)}+2H _2O _{(g)}$ at 298 K standard Gibb's energies of formation for $CH _3OH(l)H _2O(l)$ and $CO _2(g)$ are $-166.2$, $-237.2$ and $394.4$ $KJ \ mol^{-1}$ respectively. If standard enthalpy of combustion of methanol is -726 KJ $mol^{-1}$, efficieny of the fuel cell will be
What is the approximate value of $ \Delta S^{\circ} $ for the fuel cell reaction at $ 25^{\circ}$?
Which of the following is an example of simple fuel cell?
Identify the reaction taking place at cathode in fuel cell.
Which of the following reactions is used to make a fuel cell?
An examples of a simple fuel cell is:
Fuel cell involves which of the following reaction(s) ?
In a fuel cell the fuel is fed to which compartment?
In _________ cells, reactants are continuously supplied energy which can be withdrawn indefinately until outside supply of reactant is maintained. These cells are more efficient than conventional batteries and moreover, these are eco-friendly.
In hydrogen fuel cell the catalyst used is/are:
Which of the following statements regarding fuel cell is (are) true?
In a $H _2 - O _2$ fuel cell, combustion of hydrogen occurs to: