SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Nevertouch or taste chemicals.
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Keepall chemicals in open containers.
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Keepopen flames within six inches of all chemicals.
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Wipeup chemical spills at the end of each experiment.
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Detailed explanation-1: -Laboratory chemicals should never be tasted. A pipet bulb, aspirator, or mechanical device must be used to pipet chemicals or to start a siphon. To avoid accidental ingestion of hazardous chemicals, pipetting should never be done by mouth.
Detailed explanation-2: -When you are in the laboratory and take a direct sniff of the chemicals you are using, you run the risk of damaging your mucous membranes or your lungs. When it is necessary to smell chemicals in the lab, the proper technique is to cup your hand above the container and waft the air toward your face.
Detailed explanation-3: -Practice Good Housekeeping and Personal Hygiene. Avoid direct contact with any chemical. Never smell, inhale or taste laboratory chemicals. Always wash hands and arms with soap and water after removing gloves and before leaving the work area.