Scientists recently found a way to make inexpensive hydrogen - GED Prep

Question

Scientists recently found a way to make inexpensive hydrogen that can be used as a fuel. This process of hydrogen production has some similarities with photosynthesis.

In plants, photosynthesis uses energy from the Sun to chemically combine water and carbon dioxide into sugar and oxygen gas. The sugar is then used as a fuel source for the plant and organisms that consume the plant. To produce hydrogen, scientists mixed extremely small particles of cadmium and selenium, which emit electrons when exposed to light, and ascorbic acid, a chemical that produces hydrogen Ions when it decomposes. The scientists used a nickel catalyst, which causes the emitted electrons to combine with the hydrogen ions and form hydrogen gas. This reaction is continuous, and after two weeks, the hydrogen gas was still being produced. The scientists hope this will be a viable fuel source in the future.

 

Which comparison of this new process of hydrogen production and photosynthesis is supported by the information provided?

Answers
  1. correct
Explanation

The correct answer is (B). In both photosynthesis and the new process of hydrogen production, light energy is converted into chemical energy. In photosynthesis, plants use sunlight to convert water and carbon dioxide into sugar (a form of chemical energy). Similarly, in the new process, light causes particles of cadmium and selenium to emit electrons, which then combine with hydrogen ions (from the decomposition of ascorbic acid) to form hydrogen gas, another form of chemical energy. Thus, both processes transform light energy into a usable form of chemical energy.

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