The answer is 3. The first thing you need to do after being spilled with nitric acid is to wash off the arm with running water while simutaneously letting the attendant in charge of the lab know.

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The answer is 3. Another safety precaution in the laboratory is the unplugging of devices which are not in use. This is to prevent shortage of electricity or fire. Another benefit would be to conserve energy.

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The answer is 2. When there are glass wares that have cracks or need fixing, do not continue to heat the glass ware instead, go to the teacher and report it so that it would be handled carefully.

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One safety procedure that the student should be following with regards to heating test tubes is that the test tube should be slightly slanted away from the student or away from the other students to avoid accidents.

One safety procedure that the student should be following with regards to heating test tubes is that the test tube should be slightly slanted away from the student or away from the other students to avoid accidents

The answer is 2. Putting a lid into a flask while heating it would create a pressure inside the flask and could explode. This could lead to a serious accident.

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The answer is 3. Since chlorophyll is present in the leaves, extracting them by using a beaker with alcohol inside it and putting it under direct heat is the right technique for the experiment.

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The answer is 4. When dissecting a specimen, a student should take precautionary measures to void injury. Cutting away from a student’s is the right way for dissecting specimens.

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