With reference to lsquo fuel cells rsquo in which hydrogen rich fuel and oxygen are used to ge...........

Science Affairs Chemistry

With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements :

1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.

2. Fuel cells can be used for powering buildings and not for small devices like laptop computers.

3. Fuel cells produce electricity in the form of Alternating Current (AC).

Which of the statements given above is / are correct?

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Explanation:

A fuel cell is a device that converts chemical potential energy (energy stored in molecular bonds) into electrical energy. Fuel cells generates electricity with very little pollution–much of the hydrogen and oxygen used in generating electricity ultimately combines to form a harmless byproduct, namely water alongwith releasing heat.
A single fuel cell generates a tiny amount of direct current (DC) electricity, If alternating current (AC) is needed, the DC output of the fuel cell must be routed through a conversion device called an inverter.