Question
What advantage do the fuel cells have over primary and secondary batteries?

Answer

Primary batteries contain a limited amount of reactants and are discharged when the reactants have been consumed. Secondary batteries can be recharged but take a long time to recharge. Fuel cell runs continuously as long as the reactants are supplied to it and products are removed continuously.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.
Write a note on acidity of phenols.
Give the structure of A, B and C in the following reaction:$\text{CH}_3\text{CH}_2\text{I}\xrightarrow[]{\text{NaCN}}\text{A}\xrightarrow[\text{Partial hydolysis}]{\text{OH}^+}\text{B}\xrightarrow[]{\text{NaOH}+\text{Br}_2}\text{C}$
Compound $'A\ ’$ with molecular formula $\ce{C_4H_9Br}$ is treated with aq. $\text{KOH}$ solution. The rate of this reaction depends upon the concentration of the compound $'A\ ’$ only. When another optically active isomer $'B’$ of this compound was treated with aq. $\text{KOH}$ solution, the rate of reaction was found to be dependent on concentration of compound and $\text{KOH}$ both.
  1. Write down the structural formula of both compounds $'A\ ’$ and $'B\ ’$.
  2. Out of these two compounds, which one will be converted to the product with inverted configuration.
Silver is electrodeposited on a metallic vessel of total surface area $500\ cm^2$ by passing a current of $0.5 \ \ce{amp}$ $n$ for two hours. Calculate the thickness of silver deposited.
$[$Given$:$ Density of silver $= 10.5\ce{g cm^{-3}},$ Atomic mass of silver $= 108 \ \ce{amu}, F = 96,500 \ \ce{C mol^{-1}}]$
Explain with equations, the reaction to obtain alcohols by reduction of aldehydes and ketones.
Why Hunsdiecker reaction is not suitable for making alkyl iodide?
Explain density of Haloalkane Compound.
Give an example of a material used for making semipermeable membrane for carrying out reverse osmosis.
The rate constant for the decomposition of hydrocarbons is $2.418 \times 10^{–5}s^{–1}$ at $546 K$. If the energy of activation is $179.9 kJ/mol$, what will be the value of pre-exponential factor.