Chem 1LC Safety Section – Practical Questions With
Complete Solutions
Accuracy Correct Answers The closeness of a result to the true
value; calculated by percent error
Ammonium hydroxide Correct Answers - Ammonia gas
dissolved in water
- Saponify the skin which may not be immediately painful
- Skin do not form protective layers when corroded by bases
Beaker Correct Answers Contents must be easily accessed
Bleach Correct Answers - If spilled, shower
- Nitrile gloves are have a 480 min breakthrough time for bleach
- Bleach can cause severe skin burns and eye damage
- Bleach forms poisonous chlorine and chloramine gas when
combine with ammonia
Buret Correct Answers Accurately transfer and measure
variable volumes
Color Wavelengths Wheel Correct Answers
Corrosive Correct Answers Destroys living cells
Dusts Correct Answers Solid particles suspended in air
Erlenmeyer flask Correct Answers Prevent splashing or
evaporation
, Fire Correct Answers - Removing heat keeps the fuel from
vaporizing
- Water cannot be used to extinguish a Class D fire
- The fuel must be vaporized to burn
Fire Class Correct Answers A - Paper, clothing, plastic
B - Gasoline, oil, organic
C - Hot plats, computers
D - Reactive metals
Fire tetrahedron Correct Answers - Heat: pour water on the fire
- Oxygen: CO2 fire extinguisher
- Chemical chain reaction: use a halon fire extinguisher
- Fuel: keep amounts of flammable
Flammable Correct Answers Easily ignites or burns
Fumes Correct Answers Colloidal suspension of solid or liquid
particles in air
Gas Correct Answers Gas under pressure
GHS symbols Correct Answers Explosive, corrosives,
flammables, environmental hazards, oxidizers, toxins (acute),
irritants, gasses (pressure), specific toxicity
GHS Symbols and NFPA Fire Diamond Correct Answers Fatal
- Health
Aquatic toxicity - No NFPA
Oxidizer - Special Hazard
Carcinogen & Toxic - Health
Complete Solutions
Accuracy Correct Answers The closeness of a result to the true
value; calculated by percent error
Ammonium hydroxide Correct Answers - Ammonia gas
dissolved in water
- Saponify the skin which may not be immediately painful
- Skin do not form protective layers when corroded by bases
Beaker Correct Answers Contents must be easily accessed
Bleach Correct Answers - If spilled, shower
- Nitrile gloves are have a 480 min breakthrough time for bleach
- Bleach can cause severe skin burns and eye damage
- Bleach forms poisonous chlorine and chloramine gas when
combine with ammonia
Buret Correct Answers Accurately transfer and measure
variable volumes
Color Wavelengths Wheel Correct Answers
Corrosive Correct Answers Destroys living cells
Dusts Correct Answers Solid particles suspended in air
Erlenmeyer flask Correct Answers Prevent splashing or
evaporation
, Fire Correct Answers - Removing heat keeps the fuel from
vaporizing
- Water cannot be used to extinguish a Class D fire
- The fuel must be vaporized to burn
Fire Class Correct Answers A - Paper, clothing, plastic
B - Gasoline, oil, organic
C - Hot plats, computers
D - Reactive metals
Fire tetrahedron Correct Answers - Heat: pour water on the fire
- Oxygen: CO2 fire extinguisher
- Chemical chain reaction: use a halon fire extinguisher
- Fuel: keep amounts of flammable
Flammable Correct Answers Easily ignites or burns
Fumes Correct Answers Colloidal suspension of solid or liquid
particles in air
Gas Correct Answers Gas under pressure
GHS symbols Correct Answers Explosive, corrosives,
flammables, environmental hazards, oxidizers, toxins (acute),
irritants, gasses (pressure), specific toxicity
GHS Symbols and NFPA Fire Diamond Correct Answers Fatal
- Health
Aquatic toxicity - No NFPA
Oxidizer - Special Hazard
Carcinogen & Toxic - Health
