Lesson: Chapter 2 — Photosynthesis

The starch test 3 of 4 Reset answers

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Question 3

Why is the tube of alcohol stood in a water bath rather than heated directly?

A Because alcohol boils at a higher temperature than water B Because the leaf would burn C Because alcohol is flammable D Because the chlorophyll would be destroyed by direct heat

The right answer is the one marked above.

Because alcohol is flammable. It must never be put over a flame directly; standing the tube in hot water heats it safely.

Alcohol boils at a lower temperature than water, not higher, which is part of why hot water is enough to do the job.

Answer the question to continue.