Question

when heating liquid materials in laboratory glassware, a student should always

1. wear safety goggles
2. use benedicts solution
3. stopper the test tube
4. record the temperature of the liquid

Explanation:

Heating liquids in glassware poses a risk of splashing or breakage, so safety goggles are essential to protect the eyes. Benedict’s solution is for specific chemical tests (not general heating), stoppered test tubes can build pressure and explode, and recording temperature is not a universal requirement for all heating tasks.

Answer:

1. wear safety goggles