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CHE1503-25-Y

CHE1503-25-Y

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Small burns from touching hot objects, should be:

None of the other options.

Massaged gently until it feels better.

Covered immediately with a Band‐Aid to protect it from the oxygen in the air.

Brought closer to the air condition to cool it off.

Placed under running cold water.

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How should glassware be stored to prevent damage and accidents in the laboratory?

Store glassware on high shelves

Store glassware in designated cabinets or racks

Store glassware near edges of countertops

You need to bring your own glassware

Leave glassware on laboratory benches

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Appropriate use of glassware is:

Pull as much as you can when a glass stopper is stuck in the bottle.

Never place hot glass on a cold surface.

None of the other options.

When clamping glassware, make sure you tighten it as much as you can.

Carrying a glass flask by the neck.

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One

of the glassware bellow cannot be used without another piece of glassware:

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What should you do if you accidentally drop glassware and it shatters on the floor?

Quickly clean up the broken glass with your hands

Notify others and follow laboratory procedures for cleaning up broken glass

Ignore the broken glass and continue working

Leave the area and wait for someone else to clean it up

None of the other options.

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An unused/leftover chemicals should be:

Sent out to the Safety Committee.

Returned back to its original container right ‘before’ you leave the lab.

Disposed of in the designated waste container.

Thrown into the trash.

Returned back ‘immediately’ to its original container.

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To dispense a required amount of reagent:

Take the glassware you want to measure the reagent into and collect it from where the reagent is being kept.

Bring the reagent bottle to your bench and return it immediately after you are done.

Bring the reagent bottle to your bench and pass it to the next student to use.

Ask the teacher to dispense it for you.

None of the other options; reagents are not to be dispensed in lab for safety reasons.

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Flammable liquids:

Do not evaporate unless boiled.

Need direct flame for heating.

None of the other options.

Can become solid quickly.

Can catch fire easily.

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What happens when you do not dispose of wastes correctly?

All of the other options.

Waste into the trash bin, can cause dangerous work conditions for cleaning staff. Can pollute waterways if leached into groundwater at landfills.

Waste down the drain can corrode pipes, cause problems at treatment plants and cause aquatic damage.

Waste poured into the incorrect waste containers, makes it extremely difficult to deal with wates sent for treatment.

If left behind in the lab, is very difficult to identify and can be incorrectly disposed of.

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You should always hold containers that have chemicals:

Away from your body.

With a clean pair of tongs.

With both hands, tightly and near your body.

After rotating the lid in the counter-clockwise direction.

With a pair of oven gloves.

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