Question

why is it important to tie back long hair in the science lab? a to keep it styled neatly. b to avoid seeing it in experiments. c to prevent it from catching fire or dipping into chemicals. d to comply with fashion trends. 15 which of the following actions is unsafe while working with open flames in a lab? a using fire - resistant gloves. b keeping flammable materials away. c working at a safe distance. d wearing loose clothing.

Explanation:

First Question (about tying back long hair):

In a science lab, long hair can get caught in flames or chemicals. Tying it back prevents fire hazards or chemical contact, so option C (To prevent it from catching fire or dipping into chemicals) is correct. A is about styling, B about avoiding seeing, D about fashion—all incorrect.

• Option A: Fire - resistant gloves are safe (protect from heat).
• Option B: Keeping flammable materials away is safe (prevents fire).
• Option C: Working at a safe distance is safe (avoids burns).
• Option D: Loose clothing can catch fire from open flames, so wearing loose clothing is unsafe.

Answer:

C. To prevent it from catching fire or dipping into chemicals

Second Question (unsafe action with open flames):