QCM : Organic Chemistry Laboratory Safety — 21 questions

Explication

Students must immediately alert the faculty in charge so the chemical leak can be properly assisted. Completing requirements is a preparation step, not the response to an existing leak.

Explication

A major spill involves a large quantity, significant toxicity or flammability, or dangerous vapors and requires immediate evacuation. Minor spills are the ones laboratory personnel may control with a spill kit.

Explication

Chemical exposure to the skin or eyes requires continuous flushing for a minimum of 15 minutes.

Explication

Safe science combines preparation before laboratory work, disciplined professional behavior during activities, and immediate reporting when a chemical leak occurs.

Explication

Striking the match first allows immediate ignition when the gas is released and prevents gas buildup, which could create a safety hazard.

Explication

During an earthquake, people should stay away from windows and never use elevators because both can increase danger during shaking or evacuation.

Explication

The process proceeds from waste generation to segregation, then containerization, followed by collection for proper storage or disposal.

Explication

Students must complete the laboratory pre-report and review all relevant safety data sheets before participating. The pre-report demonstrates preparedness, while the safety data sheets provide hazard awareness.

Explication

Safe ignition begins by inspecting and clearing the area, closing the air hole, and striking the match before opening the gas valve. The air hole is then adjusted to produce a blue heating flame.

Explication

Focused laboratory work is part of professional conduct. Horseplay, pranks, eating, and bringing drinks into the laboratory are prohibited.

Explication

Liquid chemical waste belongs in a polyethylene carboy, while sharp objects require a rigid sharps container. Amber glass bottles are used for light-sensitive chemicals, and biohazard containers are used for potentially biologically hazardous materials.

Explication

A fume hood should not be used as a storage cabinet for chemicals or waste. The sash must also remain below the safety line, and users must keep their heads outside the hood.

Explication

Required PPE includes goggles and a hairnet, an apron or gown over a sleeved shirt, full-length pants, and closed shoes.

Explication

Safe use requires the sash to remain at a 30–45 cm working height, equipment to be at least 15 cm inside, and airflow indicators or alarms to be checked before work begins.

Explication

For a small gas fire, shut off the gas source only if it is safe to reach and use a Class B or C extinguisher. Water must not be used on gas or electrical fires.

Explication

Minor-spill response includes protecting personnel, containing and neutralizing the material, collecting residues in labelled waste, decontaminating with detergent and water, and reporting the incident.

Explication

The guided demonstration verifies that the student can use the instrument properly before approval permits independent access. Logging use is a later requirement, not the purpose of the demonstration.

Explication

A suspected gas leak requires avoiding flames and electrical switches. The nearest valve may be turned off if safe; otherwise, evacuate and notify the safety instructor when the leak is widespread.

Explication

Independent access requires six stages in order: request submission, evaluation, training, guided demonstration, approval, and logging every use.

Explication

The protocol is to shut off the burner and electrical equipment, move away from shelves, glass cabinets, and active benches, then drop, cover the head, and hold on under a sturdy table or desk.

Explication

Eye exposure requires activating the eyewash and holding the eyelids open. Body exposure requires using the safety shower, standing under the flow, and removing contaminated clothing.