Multiple choice general knowledge

Mercury is a hazardous chemical. Which item does not contain mercury?

  1. Computer disks

  2. Blinking lights in sneakers

  3. Fluorescent light bulbs

  4. Thermometers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Computer disks and storage media do not contain mercury. Fluorescent light bulbs contain small amounts of mercury vapor, traditional thermometers used mercury metal, and some blinking shoe lights use mercury switches. Mercury is toxic and its use is being phased out in many products.

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