Basic good laboratory practices include: False All unauthorized experiments are prohibited. False True Return all unused chemicals to their original containers. Never leave a lit burner unattended. True Work areas should be kept clean and tidy. False Laboratory work can be started immediately upon entering the laboratory even if the instructor is not yet present. Organic solvents are potential hazards because most organic solvents are volatile and flammable Hot glass looks the same as cold glass. True True False True False Chipped or cracked glassware is okay to use. Organic solvents are potential hazards because most organic solvents absorb directly through the skin You are allowed to enter the chemical preparation/storage area any time you need to get an item.