Answers to Diagnostic Test for Chemistry

1. Diagnostic Test
Answers
A U G U S T 2 0 2 3
F I R S T S E M E S T E R
S . Y. 2 0 2 3 – 2 0 2 4

2. Question No. 1
How many carbon atoms are present in
this hydrocarbon line structure: ?

3. Answer to Question No. 1
Four (4)

4. Question No. 2
Referring to the same structure in no. 1,
what is the total number of hydrogen
atoms attached to all the carbon atoms
in the structure?

5. Answer to Question No. 2
Eight (8)

6. For Numbers 1 to 7:

7. Question No. 3
How many carbon atoms are present?

8. Answer to Question No. 3
Two (2)

9. Question No. 4
What is the chemical formula of the
given structure?

10. Answer to Question No. 4

11. Question No. 5
How many bonds are formed by each
hydrogen?

12. Answer to Question No. 5
One (1)

13. Question No. 6
How many bonds are formed by each
carbon?

14. Answer to Question No. 6
Four (4)

15. Question No. 7
What type of hybridization is present in
each carbon?

16. Answer to Question No. 7
sp

17. For Numbers 8 to 13:
Identify the functional group of the
given structures.

18. Question No. 8

19. Answer to Question No. 8
Carboxylic Acid

20. Question No. 9

21. Answer to Question No. 9
Amine

22. Question No. 10

23. Answer to Question No. 10
Phenol

24. Question No. 11

25. Answer to Question No. 11
Ether

26. Question No. 12

27. Answer to Question No. 12
Aldehyde

28. Question No. 13

29. Answer to Question No. 13
Alkene

30. Question No. 14
Which of the following is NOT allowed
inside the science laboratory?

31. Answer to Question No. 14
C. Food and Beverages

32. Question No. 15
Why is the wearing of PERSONAL
PROTECTIVE EQUIPMENT (PPE) in
the laboratory IMPORTANT?

33. Answer to Question No. 15
C. It provides safety and
protection against hazardous
chemicals.

34. Question No. 16
Which of the following should be worn
when performing experiments?

35. Answer to Question No. 16
B. Laboratory coat /gown,
goggles, mask, gloves,
hairnet and closed shoes

36. Question No. 17
What is the purpose of the reagent
bottles in the laboratory?

37. Answer to Question No. 17
A. Storage for chemicals and
reagents

38. Question No. 18
Where are chemicals and reagents that
are needed in the experiment placed?

39. Answer to Question No. 18
E. Reagent Rack

40. Question No. 19
Where is the proper place to keep
personal belongings when you are
performing experiments?

41. Answer to Question No. 19
D. Lockers / Cabinets

42. Question No. 20
What should you do in case you break a
test tube while performing an
experiment?

43. Answer to Question No. 20
C. Sweep the broken test
tube and throw it into the
glass disposal box.

44. Question No. 21
Which of the following is TRUE about
the proper wearing of PPEs?

45. Answer to Question No. 21
B. Masks should be worn
especially when performing
experiments that involve
hazardous fumes.

46. Question No. 22
What should you do if there is an
excess hydrochloric acid (HCl) after
conducting an experiment?

47. Answer to Question No. 22
E. Pour into the waste
receptable for acids.

48. Question No. 23
Which of the following is the proper way
of handling and storing flammable
liquids such as alcohol and ether?

49. Answer to Question No. 23
A. They should be stored and
used away from ignition
sources.

50. Question No. 24
Which of the following should be done
before performing an experiment that
involves heating?

51. Answer to Question No. 24
E. All of the choices

52. Answer to Question No. 24
A.Be able to distinguish the gas valve from the water valve.
B.Check if the gas hoses, tubing, and regulators are in good
working condition.
C.Check if the burner is properly connected to the gas valve.
D.Check if there are no flammable substances in the area.

53. Question No. 25
If you smell gas, what should be the
immediate thing to do?

54. Answer to Question No. 25
C. Immediately turn off the gas
valve and inform the teacher
and the laboratory technician.

55. Question No. 26
What is the proper way of handling solid
chemical wastes?

56. Answer to Question No. 26
E. Place them in their
appropriate waste containers.

57. Question No. 27
What should you do if you accidentally
spill sulfuric acid on your hand?

58. Answer to Question No. 27
B. Wash your hands with
running water and call the
attention of the teacher.

59. Question No. 28
What is the immediate action to be
done if you accidentally cut yourself
with a broken glass dropper?

60. Answer to Question No. 28
C. Inform the teacher of
immediate first aid and then
go to the clinic.

61. Question No. 29
The following equipment is used in fire-
related incidents in the laboratory
EXCEPT:

62. Question No. 29
A.Fire detection device
B.Smoke alarm
C.Sink and faucet
D.Sprinklers
E.Fire extinguisher

63. Answer to Question No. 29
C. Sunk and Faucet

64. Question No. 30
What should you do if you suddenly feel
dizzy and have difficulty breathing while
conducting an experiment?

65. Answer to Question No. 30
B. Inform the teacher for
proper first aid and go to the
clinic.

66. Question No. 31
Which of the following is a good
laboratory practice?

67. Answer to Question No. 31
C. Using electronic gadgets
in the laboratory is
prohibited.

68. For Question Nos. 32 and 33:
Choose from the following
safety symbols:

69. For Question Nos. 32 and 33:
A B C D E

70. Question No. 32
It is a symbol used to warn that the
substance is poisonous when
swallowed or inhaled and may possibly
lead to death.

71. Answer to Question No. 32
A.

72. Question No. 33
This means that the reagent
radioactive.

73. Answer to Question No. 33
D.