CHM095 - Basic Lab Chemistry - Final Assessment Portage
ACTUAL EXAM COMPLETE QUESTIONS AND CORRECT
ANSWERS LATEST UPDATE THIS YEAR
✅ SUMMARY
This exam focuses on:
• Lab safety + correct handling
• Equipment identification and use
• Basic chemistry concepts (reactions, acids, mixtures)
• Measurement accuracy and data handling
• Separation and purification techniques
• Practical lab procedures and interpretation
1.
Which piece of laboratory equipment is most appropriate for accurately measuring 25.00 mL of liquid?
A. Beaker
B. Erlenmeyer flask
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C. Graduated cylinder
D. Watch glass
Answer: C
Rationale: Graduated cylinders are designed for moderate accuracy in liquid measurement.
2.
What does the prefix “milli-” represent in the metric system?
A. 10¹
B. 10⁻¹
C. 10⁻³
D. 10⁻⁶
Answer: C
Rationale: Milli- means one-thousandth (10⁻³).
3.
Which safety device is used to wash chemicals from the eyes?
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A. Fire extinguisher
B. Fume hood
C. Eyewash station
D. Safety shower
Answer: C
Rationale: Eyewash stations are designed for eye decontamination.
4.
What is the correct SI unit for mass?
A. Liter
B. Gram
C. Meter
D. Joule
Answer: B
Rationale: Gram (g) is commonly used for laboratory mass measurements.
5.
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Which subatomic particle has a positive charge?
A. Electron
B. Proton
C. Neutron
D. Photon
Answer: B
Rationale: Protons carry a positive charge.
6.
What is the main purpose of a Bunsen burner in the lab?
A. Measure mass
B. Heat substances
C. Store chemicals
D. Filter solutions
Answer: B
Rationale: Bunsen burners provide controlled heating.