What should be worn to protect the eyes during an experiment?

Correct answer: Safety goggles

The direct answer is D: safety goggles. In an experiment, liquid chemicals, hot drops, glass fragments, dust, or small particles may unexpectedly move toward the face. Safety goggles are designed to cover and protect the eyes from the front and, depending on their design, from the sides. Therefore they are the proper protective equipment. Option A, a cotton cap, may cover hair but does not protect the eyes. Option B, a wristwatch, tells time and may even be unsuitable near chemicals or water; it gives no eye protection. Option C, ordinary spectacles, are made mainly for vision correction and usually do not seal or cover the eyes sufficiently against splashes and flying particles. They are not a substitute for laboratory goggles. Option D is correct because goggles are specifically made for laboratory eye safety. A careful student should put them on before beginning the practical work, follow the teacher’s instructions, and never look directly into a reaction. Exam cue: eye protection in a laboratory means safety goggles, not ordinary glasses.