Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
REGIONAL FOURTH QUARTER ASSESSMENT IN SCIENCE 10
Name:
Grade/Section:
Date:
Score:
Directions: Read each item carefully. Choose the letter of the correct
answer and write it on your answer sheet.
1. Which of the following statements proposed by Robert Boyle, describes the
relationship between the four measurable properties of gases?
A. Gases with equal volumes at the same temperature and pressure
contain an equal number of molecules.
B. The pressure of a fixed amount of gas is directly proportional to its
absolute temperature.
C. The volume of a given mass is inversely proportional to its pressure
at constant temperature.
D. In the absence of any change in pressure, temperature and volume
of a gas are directly related.
2. What will happen to the volume of a gas if the pressure increases at a
constant temperature?
A. constant
C. increases
B. decreases
D. remains the same
3. What change would occur to the volume of a gas if the temperature
decreases while the pressure remains constant?
A. constant
C. increases
B. decreases
D. remains the same
4. Which law describes the relationship between pressure-temperature at
constant volume of a given mass of gas?
A. Boyles’ Law
C. Ideal Gas Law
B. Avogadro’s Law
D. Gay-Lussac’s Law
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
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Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
5. How does Boyle’s Law applied to the functioning of a bicycle pump?
A. The pump cylinder heats up during operation, causing the air inside
to expand and increase the pressure.
B. The pump valve allows air to flow in only one direction, ensuring that
the pressure inside the pump remains constant.
C. The pump nozzle expands when air is released, causing a decrease
in pressure and allowing air to be pumped into the tire.
D. When the pump handle is pressed down, the volume inside the pump
chamber decreases causing the air pressure to increase.
6. How does Charles’ Law apply to the seasonal expansion and contraction of
tires?
A. During the warmer seasons, the tires contract as the air inside them
expands due to the increased temperature.
B. The volume of air inside the tires remains constant throughout the
year, regardless of temperature changes.
C. The tires expand in size during colder seasons due to the increased
pressure resulting from a decrease in temperature.
D. As the temperature decreases during colder seasons, the volume of
the air inside the tires decreases, causing them to contract.
7. How does Gay-Lussac’s Law apply to the bursting of a spray can when
thrown on fire?
A. The pressure inside the can increases due to the high temperature,
causing the can to burst.
B. The pressure inside the can decreases due to the combustion
reaction, leading to a burst in the can.
C. The temperature of the gas inside the can remains constant,
preventing any changes in pressure or bursting.
D. The volume of the gas inside the can decreases, leading to a decrease
in pressure and causing the can to burst.
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
8. Which of the following scenarios demonstrates practical application of
Charles’ Law?
A. A can of soda becomes colder when placed in a refrigerator.
B. Adding more gas to a sealed container increases its pressure.
C. A hot air balloon expands and rises as the air inside it is heated.
D. Squeezing a flexible water bottle decreases its volume and increases
the pressure.
9. A gas sample at 300 K undergoes change of its volume from 3L to 4L. with
this change in volume, the number of moles also change from 0.600 mol to
0.800 mol. According to the Avogadro’s law, what can be concluded
about the relationship between the volume and the number of moles of the
gas?
A. The temperature and pressure are directly proportional.
B. The temperature and pressure are inversely proportional.
C. The number of moles and volume are directly proportional.
D. The number of moles and volume are inversely proportional.
10. A gas sample has a volume of 10 L at a temperature of 273 K and a
pressure of 2 atm. If the pressure and temperature remains constant,
according to Avogadro’s law, what can be concluded about the relationship
between the volume and the number of moles of gas?
A. The volume and number of moles of gas are directly proportional.
B. The volume and number of moles of gas are inversely proportional.
C. The volume and number of moles of gas have no specific
relationship.
D. The volume and number of moles of gas are independent of each
other.
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
11. A sample of gas is kept in a sealed container at a constant volume. If both
the pressure and temperature of the gas increased simultaneously, which
of the following statements best explains the observed changes?
A. The gas molecules move faster, leading to an increase in pressure
and temperature.
B. The number of gas molecules increases, resulting in an increase in
pressure and temperature.
C. The volume of the gas increases, causing a decrease in pressure and
an increase in temperature.
D. The intermolecular forces between gas molecules weaken, resulting
in a decrease in pressure and an increase in temperature.
12. Analyze the following scenarios based on Boyle’s Law and determine which
situation accurately applies the principles of the law.
A. A gas sample at a constant pressure experiences a decrease in
volume as the temperature decreases.
B. A gas sample at an initial volume of 10 L is heated, causing the
pressure to double while the volume remains constant.
C. A gas sample at a constant volume experiences an increase in
pressure due to an increase in the number of gas molecules.
D. A gas sample at an initial pressure of 3 atm is compressed to half of
its initial volume while the temperature remains constant.
13. Given a constant temperature, if the volume of a gas is decreased, what
would be the expected effect on its pressure?
A. the pressure would increase
B. the pressure would decrease
C. the pressure would remain the same
D. It is impossible to determine the effect without additional
information.
14. How does an increase in temperature affect the pressure of a gas,
according to Gay-Lussac’s Law?
A. Increasing the temperature increases the pressure of the gas.
B. Increasing the temperature decreases the pressure of the gas.
C. Increasing the temperature has no effect on the pressure of the gas.
D. The effect of temperature on the pressure of the gas depends on
other factors.
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
15. Which type of carbohydrates are recommended for inclusion in a healthy
eating-habit?
A. legumes and beans
B. whole grains, whole wheat bread
C. sweet potatoes and other root vegetables
D. fruits and vegetables which provide natural sugars
16. Which of the following statements accurately describes carbohydrates?
A. primarily found in animal–based foods
B. considered as the primary source of energy
C. are not essential nutrients for the human body
D. are classified into two types: saturated and unsaturated
17. Which of the following biomolecules is responsible for storing and
transmitting genetic information in living organisms?
A. Lipids
C. Nucleic Acids
B. Proteins
D. Carbohydrates
18. How can carbohydrates be applied as a source of quick energy during
endurance exercise?
A. By limiting carbohydrate intake before exercise to promote fat
utilization as an energy source.
B. By avoiding carbohydrates altogether and relying solely on protein
and fat for energy during endurance exercises.
C. By consuming simple carbohydrates, such as fruits or sports drinks,
during exercise to provide readily available energy.
D. By consuming complex carbohydrates, such as whole grains or
starchy vegetable, prior to exercise to ensure sustained energy
release.
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
19. How can proteins facilitate muscle recovery and growth after intense
exercise?
A. By reducing protein intake after exercise to prevent excessive muscle
growth.
B. By taking proteins before exercise to enhance performance during
the workout.
C. By substituting proteins with carbohydrates for optimal postworkout recovery.
D. By taking protein-rich foods or supplements into the post-workout
period to aid in muscle repair and synthesis.
20. How can lipids be applied in skin care products to provide moisturization
and protection for the skin?
A. By consuming high amounts of saturated fats to enhance the
natural lipid production of the skin.
B. By excluding lipids from skin care products to prevent greasiness
and maintain a matte complexion.
C. By substituting lipids with carbohydrates to achieve similar
moisturizing and protective effects on the skin.
D. By incorporating lipids, such as plant oils to replenish and retain
moisture, resulting in hydrated and supple skin.
21. In a laboratory experiment, researchers introduced a foreign DNA
sequence into bacterial cells to alter their characteristics. Which process
was employed in this experiment?
A. Translation
C. DNA Replication
B. Transcription
D. Genetic Transformation
22. The researcher found out that the chemical composition of the unknown
substance consists of carbon, hydrogen, and oxygen atoms in a 1:2:1
ratio. Based on this information, determine the classification of the
substance.
A. Lipid
C. Nucleic Acid
B. Protein
D. Carbohydrates
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
23. Which of the following statements accurately describes a characteristic
of lipids?
A. insoluble in water
B. primary source of energy for cells
C. have a structural role in forming enzymes
D. are made up of repeating nucleotide units
24. A scientist is studying a particular nucleic acid molecule and finds that it
consists of adenine, guanine, cytosine, and uracil. Based on this
information, which type of nucleic acid is being studied?
A. DNA
B. RNA
C. mRNA
D. tRNA
25. Hemoglobin is a transport protein that carries oxygen from the lungs to
other organs and tissues. Analyze the significance of this function of
proteins in respiration.
A. it ensures efficient delivery of oxygen to tissues
B. regulates the synthesis of nucleic acids in cells
C. facilitates intercellular communication and signaling
D. aids in maintaining structural integrity of cells and tissues
26. Based on your knowledge of biomolecules, how would you explain the
concept and its significance in living organisms.
A. They are primarily involved in energy storage and release in living
organisms.
B. They are inorganic molecules that provide structural support to cells
and tissues.
C. They are molecules found only in plants and responsible for
photosynthesis.
D. They are organic molecules essential for life processes, including
carbohydrates, lipids, nucleic acids, and proteins.
27. What is the term used to represent a chemical reaction using symbol?
A. chemical equation
C. chemical presentation
B. chemical formula
D. chemical representation
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
28. At what point can a chemical equation be balanced?
A. when reactants have greater mass than the product
B. when the product has greater number of elements than reactants
C. when the mass of the reactant is equal to the mass of the product
D. when the atomic composition of reactants and products is different
29. What information does the number preceding a chemical formula
provides?
4Al2+ 3O2 � 2AlO3
A. atom
B. equation
C. subscript
D. coefficient
30. When bonds are broken or formed in a chemical reaction, what is the
resulting substance called?
A. atoms
B. catalyst
C. product
D. reactant
31. Which of the following is the correct balanced equation?
CO + 4H2O
A. C3H8 + O2
3CO2 + H2O
B. CH + O2
CO2 + 2H2O
C. CH4 + 2O2
D. C3H8 + 5O2
3CO2 + 4H2O
32. Balance the given chemical equation:
PCl5 + H2O
POCl3 + HCl
POCl3 + 2HCl
A. PCl5 + H2O
2POCl3 + HCl
B. 2PCl5 + 2H2O
POCl2 + 2HCl
C. PCl3 + 3H2O
POCl3 + HCl
D. PCl5 + 2 H2O
33. Which of the following is the correct balanced equation?
2H2O2
A. 2H2O + O2
Na + Cl2
B. 2NaCl + F2
NaOH + H2
C. 2Na + 2H2O
D. 2CH4 + 3O2
2CO2 + 2H2O
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
34. Balance the given chemical equation:
Na2S + 2Ag
SAg2 + 3Na
A. Na2S + 2Ag
Ag2 + NaS
B. 4Na2S + 2Ag
Ag2S + 2Na
C. Na2S + 2Ag
2Ag2 + NaS
D. Na2S + 2Ag
Ag2 + Na
35. Which of the following chemical equations does not follow the law of
conservation of mass?
A. 2Na + Cl2 → 2NaCl
B. Zn + 2HCl → ZnCl2 + H2
C. NaOH + HCl → NaCl + H2O
D. SnCl + 2FeCl3 → 2FeCl2 + SnCl4
36. To balance the equation representing the reaction between sodium and
chlorine gas to form table salt, what are the coefficients required, in the
given order for sodium, chlorine, and table salt?
A. 2, 2, 2
B. 2, 0, 2
C. 2, 1, 2
D. 3, 2, 2
37. In the given chemical reaction, how many atoms of each element are
present in the reactants?
CH4 + 2O2 → CO2 + 2H2O
A. 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms
B. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
C. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
D. 4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms
38. Assess the balance of the given chemical equation and determine whether
it obeys the law of conservation of mass.
4NH3 + 5O2
4NO + 6H2O
A. The equation is balanced, and followed the law of conservation of
mass.
B. The equation is not balanced, but followed the law of conservation
of mass.
C. The equation is not balanced, and does not follow the law of
conservation of mass.
D. Cannot determine the balance and conservation of mass based on
the given information.
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
39. Which of the following factors would NOT have a significant impact on
increasing the rate of a chemical reaction?
A. adding a catalyst
B. raising the temperature
C. increasing the volume of the container
D. increasing the concentration of reactants
40. Which of the following measures should be implemented to decrease the
presence of spoilage microorganisms in milk during the process of
pasteurization process?
A. heat
B. catalyst C. vacuum
D. good bacteria
41. Which of the following factors does NOT affect the rate of chemical
reactions?
A. volume
C. temperature
B. catalyst
D. concentration
42. How would the rate of a chemical reaction be affected if the particles of
the reactants were able to acquire the required energy through heat
absorption?
A. stop
C. increases
B. constant
D. decreases
43. Which of the following BEST describes the effect of increasing the surface
area of the reactants?
A. The rate of reaction increases as there is more contact between
reactant particles.
B. The rate of reaction decreases as due to reduced contact between
reactant particles.
C. The rate of reaction remains unchanged as surface area does affect
reaction rate.
D. The rate of reaction becomes unpredictable and cannot be
determined.
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
44. How does increasing the concentration of reactants affect the reaction
rate?
A. The rate of reaction remains unchanged as surface area does affect
reaction rate.
B. The reaction rate decreases as higher concentrations hinder the
collision frequency.
C. The reaction rate increases due to enhanced collision frequency
between reactant particles.
D. The rate of reaction becomes unpredictable and cannot be
determined.
45. Fresh fish and meat that are not stored in a refrigerator show signs of
spoilage in less than a day. What has caused this spoilage?
A. oxygen in air
B. temperature changes
C. presence of microorganisms
D. all of the above
46. The rate of reaction increases as the temperature increases. Which of the
following statements provides the best explanation for this?
A. Higher temperature has higher activation energy.
B. At lower temperatures the particles do not collide with each other.
C. Increasing the temperature increases the number of particles, so
they collide more often.
D. At higher temperatures the particles have more energy, move faster,
and collide more often.
47. Chemical reactions occur when chemical bonds between atoms are formed
or broken but, it usually stops. What could be the reason for this?
A. wrong catalyst was used
B. the catalyst has been used up
C. the particles have used up its energy
D. one or more of the reactants has been used up
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph
Republic of the Philippines
Department of Education
Region III
SCHOOLS DIVISION OF BULACAN
48. In a reaction with hydrochloric acid, why does powdered magnesium
reacts faster than the same mass of magnesium ribbon?
A. The powdered magnesium is hotter than the magnesium ribbon.
B. The powdered magnesium contains more atoms than the
magnesium ribbon.
C. The powdered magnesium has bigger surface area than the
magnesium ribbon.
D. The powdered magnesium has a smaller surface area than the
magnesium ribbon.
49. What could be a possible explanation for a loaf of bread expanding beyond
its usual size, despite using the usual amount of dough.
A. more flour was used for the dough
B. the dough was baked at high temperature
C. there were few cuts around the surface of the dough
D. the amount of yeast added to the dough was doubled
50. Which of the following statements best explain why using small and thin
pieces of wood are preferable over large logs when starting a fire?
A. Small and thin pieces of wood have a high temperature absorption
capacity.
B. Small and thin pieces of wood contribute to an increased fire
intensity.
C. Small and thin pieces of wood release a greater amount of fuel as
chemicals.
D. Small and thin pieces of wood provide a larger surface area in
contact with the fire.
Provincial Capitol Compound, Brgy. Guinhawa, City of Malolos, Bulacan
website: https://bulacandeped.com email. bulacan@deped.gov.ph