Question

Hydrogen fuel cells burn with _______ and produce _______.

Answer 1

The correct option is B.

Hydrogen fuel cell burns with OXYGEN and produce WATER.

Hydrogen fuel cell is an electro-chemical cell that make use of hydrogen and oxygen to produce electricity. Heat and water are given off as the by products of the reaction. The device convert chemical energy that is stored in molecular bonds to electrical energy. Fuel cells require continuous supply of hydrogen and oxygen to sustain the chemical reactions in the cell.

Answer 2

Hydrogen burns with oxygen as in combustion reaction to form water.
H₂ + O₂ →  H₂O