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Common laboratory apparatus are usually ...

Common laboratory apparatus are usually made of glass or porcelain but not of metals. Give reason.

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**Step-by-Step Solution:** 1. **Material Properties**: Common laboratory apparatus are primarily made of glass or porcelain rather than metals. This is largely due to the inherent properties of these materials. 2. **Reactivity**: Metals are generally more reactive than glass and porcelain. This means that when metals come into contact with various chemicals, they can react and alter the composition of the substances being studied, which can lead to inaccurate results. 3. **Ease of Cleaning**: Glass and porcelain are easier to clean compared to metals. In a laboratory setting, it is crucial to maintain cleanliness to avoid contamination of experiments. Glass and porcelain surfaces can be easily scrubbed and sterilized without damaging the material. ...
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