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Topic 6 : Fuel Cells

1. ⇒ (AIPMT 2015 Cancelled Paper )

A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as

(A) dynamo

(B) Ni-Cd cell

(D) electrolytic cell

Correct Answer is Option (C)

A device that converts energy of combustion of fuels, directly into electrical energy is known as fuel cell.

2. ⇒ (AIPMT 2007 )

The efficiency of a fuel cell is given by

(A) $Δ$ G/ $Δ$ S

(B) $Δ$ G/ $Δ$ H

(D) $Δ$ H/ $Δ$ G

Correct Answer is Option (B)

Efficiency of a fuel cell ( $ϕ$ ) = $\frac{Δ G}{Δ H} \times 100$

Generally, fuel cells are expected to have an efficiency of 100 percent.

⇒Electrochemistry