CHE 114 Chemistry Methods pass Questions paper

 CHE 114 Chemistry Methods Exam Questions

1. Which of the following is a personal protective equipment (PPE) used in the lab?  

   a) Watch  

   b) Safety goggles  

   c) Necklace  

   d) Sandals  

2. Which instrument measures mass?  

   a) Thermometer  

   b) Balance  

   c) Burette  

   d) Pipette  

3. What is the chemical symbol for sodium?  

   a) S  

   b) So  

   c) Na  

   d) K  

4. The SI unit for temperature is:  

   a) Kelvin  

   b) Celsius  

   c) Fahrenheit  

   d) Joule  

5. The chemical formula for water is:  

   a) CO₂  

   b) H₂O  

   c) NaCl  

   d) O₂  

6. Which of these is an exothermic process?  

   a) Melting ice  

   b) Burning wood  

   c) Boiling water  

   d) Dissolving salt  

7. Vertical columns in the periodic table are called:  

   a) Periods  

   b) Groups  

   c) Rows  

   d) Blocks  

8. Molarity is expressed in:  

   a) mol/L  

   b) g/mL  

   c) mol/kg  

   d) L/mol  

9. A burette is used to:  

   a) Measure mass  

   b) Transfer liquids  

   c) Dispense precise volumes  

   d) Heat solutions  

10. How many significant figures are in 0.0045?  

    a) 2  

    b) 3  

    c) 4  

    d) 1  

11. Acids have a pH:  

    a) <7  

    b) >7  

    c) =7  

    d) ≥7  

12. The first element in the periodic table is:  

    a) Hydrogen  

    b) Helium  

    c) Oxygen  

    d) Lithium  

13. A neutral solution has a pH of:  

    a) 0  

    b) 7  

    c) 14  

    d) 10  

14. In a chemical reaction, the starting substances are called:  

    a) Products  

    b) Reactants  

    c) Catalysts  

    d) Ions  

15. The atomic number represents the number of:  

    a) Protons  

    b) Neutrons  

    c) Electrons  

    d) Nucleons  

16. A __________ is used to extinguish fires in the lab.  

17. The unit for measuring volume in the SI system is __________.  

18. Helium has __________ protons in its nucleus.  

19. Phenolphthalein turns __________ in a basic solution.  

20. The chemical formula for sulfuric acid is __________.  

21. Isotopes of an element have the same number of protons but different __________.  

22. The process of a liquid turning into a gas is called __________.  

23. The common name for hydrochloric acid (HCl) is __________.  

24. Electrons have a __________ charge.  

25. A substance that speeds up a reaction without being consumed is a __________.  

26. To convert Celsius to Kelvin, you __________ 273.15.  

27. Combustion of methane produces CO₂ and __________.  

28. Molarity is defined as moles of solute per __________ of solution.  

29. Neutralization involves an acid reacting with a __________.  

30. The atomic number of carbon is __________.  

31. Safety goggles are optional if you wear glasses.  

TRUE OR FALSE

32. Density is calculated as mass divided by volume.  

TRUE OR FALSE

33. Noble gases are highly reactive.  

TRUE OR FALSE

34. Boiling water is a chemical change.  

TRUE OR FALSE

35. Mercury is a liquid at room temperature. 

        TRUE OR FALSE

36. The pH scale ranges from 1 to 14.  

TRUE OR FALSE

37. Oxygen has an atomic number of 8.  

TRUE OR FALSE

38. Ionic bonds form by sharing electrons. 

        TRUE OR FALSE

39. Exothermic reactions feel cold to the touch.  

TRUE OR FALSE

40. Carbon dioxide (CO₂) is an organic compound.  

TRUE OR FALSE