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1 answer:
Answer : The correct option is, (B) Oxygen diffuses through the anode.
Explanation :
Hydrogen-oxygen fuel cell : As we know that the a fuel cell is a type of device that converts the chemical energy into electrical energy. In the hydrogen-oxygen fuel cell, the proton exchange membrane cell uses hydrogen and oxygen gas as a fuel.
In this cell reaction, hydrogen and oxygen gas are the reactants and water, electricity and heat are the products.
The half-cell electrode reaction are:
At anode :
At cathode :
That means the hydrogen undergoes reduction at anode and oxygen undergoes oxidation at cathode.
As per question, we can say that oxygen diffuses towards anode and hydrogen diffuses towards cathode.
Hence, the correct option is, (B) Oxygen diffuses through the anode.
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Answer:
Two Half-lives
Explanation:
Let number of Parent nuclei Initially present be X,
Then, finally Parent nuclei Will remain with
daughter nuclei.
In one half- life , parent nuclei becomes half of initial.
So, starting with X parent nuclei,
After one half-life, it will degrade to .
After another half life , Parent nuclei will become half of
Which is equal to .
So, Parent nuclei have to go through Two half-lives.