Choose the correct response for each item. More than one choice may apply. 1. While performing in the laboratory, you spilled a corrosive solution on your lab gown. Which of the following will you do immediately? a. Check your workstation for corrosions and other reaction b. Remove the lab gown and the garments under it c. Remove the lab gown d. Clean the spill 2. How would you classify a test
Choose the correct response for each item. More than one choice may apply.
1. While performing in the laboratory, you spilled a corrosive solution on your lab gown. Which of the following will you do immediately?
a. Check your workstation for corrosions and other reaction
b. Remove the lab gown and the garments under it
c. Remove the lab gown d. Clean the spill 2. How would you classify a test tube’s function? a. To contain b. To deliver c. Both “to contain” and “to deliver”
d. Neither “to contain” and “to deliver”
3. When mixing water and a strong acid, what comes first?
a. Acid
b. Water
c. Pour the two at the same time
d. Whichever has the greater amount
4. What is the most practical rule to avoid the parallax?
a. Have three observers read the measurement for increased precision
b. Transfer the liquid to smaller glassware
c. Read the contents at eye level
d. Always use Pyrex brand
5. In the absence of a fire extinguisher, which of the following will you first to extinguish a fire from organic substances such as gasoline?
a. Cover it with a wet blanket
b. Pour it with water
c. Pour it with sand
d. Blow it off
Identify whether the following statements are True or False.
6. Contamination increases once a bottle of reagent is opened.
7. Spatulas can be used to break up an encrustation a solid chemical inside a bottle.
8. Drying the interior surfaces of glassware or porcelain ware is a requirement after being washed.
9. Evaporating is used to reduce the volume of a solution that contains a nonvolatile solute.
10. Hot objects weigh more than objects at room temperature.
11. Filters are never filled to more than three quarters of capacity.
12. Beakers, graduated cylinder, and test tubes are not labeled as TC or TD since it can both deliver and contain liquids.
13. Droppers are used mainly as TC.
14. Looking higher than the liquid’s surface results to higher readings.
15. Aliquot can be removed as an excess from wet volumetric equipment.
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