Republic of the Philippines
Department of Education
Region V (Bicol)
Division of Catanduanes
PALTA NATIONAL HIGH SCHOOL
Palta Virac, Catanduanes
FIRST QUARTER EXAM IN
PHYSICAL SCIENCE
Name: _________________________________________________________________ Grade & Section: ____________________________
PART I- MULTIPLE CHOICE: Read each item carefully and choose the correct answer from among the four alternatives. Write the letter of the
correct answer in your answer sheet.
1.
Which process is responsible for the formation of light elements such as Hydrogen and Helium?
a. big bang & nucleosynthesis
c. supernova nucleosynthesis.
b. stellar nucleosynthesis
d. terrestrial nucleosynthesis
2.
How do heavier elements form?
a. Though combustion
b. Through nuclear fission
3.
This is known as the origin and production of heavy elements that serves as model for scientist where lower atomic number can be
increased into a higher atomic number by fusing the atom of lighter elements?
a. Stellar Nucleosynthesis
b. Primordial Nucleosynthesis
4.
c. Ionic bond
d. van der waals
Which of the following statement is FALSE about the molecular geometry shown below?
a.
b.
c.
d.
7.
c. Atom
d. Halogens
What kind of intermolecular forces can be formed by this kind of substances having this kind molecular geometry?
a. Hydrogen bond
b. dipole dipole bond
6.
c. R-Process
d. Supernova Nucleosynthesis
These are elements with atomic numbers beyond 103 that can be produced by fusing lighter elements are called?
a. Super Heavy Elements
b. Gases Elements
5.
c. Through nuclear fusion
d. Through nuclear synthesis
Linear and trigonal planar are polar
Octahedral and square planar are non-polar
Tetrahedral molecular geometry is non-polar
Trigonal bypiramidal is polar
In which of the following pair of substances the mothball will not be dissolved?
a. Water and and kerosene
c. alcohol and oil
b. Oil and gasoline
d. water and vinegar
8.
In which of the following (intramolecular Forces of Attraction (IMFA’s) the water strider insects cannot stay longer?
a. H-bonding
c. Dipole-dipole
9.
b. Ion-dipole
d. London forces
At any certain time, the shift in the position of the electrons in an atom will likely create a temporary positive and negative poles. This is
known as
a. dipole forces
c. dipole moment
b. dispersion forces
d. instantaneous dipole
10. How does dipole-dipole interaction happen?
a. Polar molecules shift electron density that gives rise to neutral substances.
b. The electron distribution in the polar molecules is distorted that results to (-) and (+) poles.
c. Polarization of big nonpolar molecules brings about the formation of permanent (+) and (-) charges.
d. The (-) and (+) ends of one polar molecule align themselves to the (+) and (-) ends of another polar molecule and attract
each other.
11. The atmospheric pressure on top of a mountain is lower than at sea level. As a consequence, what will happen to the cooking time of
an egg on top of the mountain?
a. The egg will cook faster since the boiling temperature will be lower.
b. The egg will cook at a shorter time since the boiling temperature will be higher.
c. The egg will cook at a longer time due to a lower boiling temperature.
d. The egg will cook at a shorter time due to higher boiling temperature.
12. Using the chart on the vapour pressure, which among the four substances, has the lowest vapor pressure?
a. water
c. bromine
b. ethyl alcohol
d. diethyl ether
13. Which biomolecular group carries and passes on the hereditary information of the organism?
a. carbohydrates
c. lipids
b. nucleic acids
d. proteins
14. Which of the following does NOT belong to the classification of lipids?
a. hemoglobin
c. phospholipids
b. steroid
d. triglyceride
15. Which of the following carbohydrates cannot be easily digest?
A.
C.
B.
D.
16. What makes the answer for item no. 12 is not easy to digest?
a. because the answer has a great number and chain of amino acids.
b. because the answer is made up of more one than rings of sugar
c. because the answer is a kind of saturated fats
d. because the answer is a kind of unsaturated fats
17. Suppose you dissolve Zinc (Zn) in Hydrochloric acid (HCl) add more acid than usual. Then drop pieces of Zinc. The zinc will be easily
dissolve compare than before. Which statement below is TRUE?
a. Increasing the concentration of HCl, results for more collision with the atom of Zn, thus more Zn reacts with acid.
b. Increasing the concentration of HCl, results for rise of temperature thus more Zn reacts with it.
c. Increasing the concentration of HCl, results increase in surface area thus more Zn reacts with acid
d. Increasing the concentration of HCl, results for increase in pressure that results for the dissolving of Sn in acid.
18. Why does a candle burn more rapidly when placed in an open jar than in air? What accounts for this reaction?
a. Higher Oxygen concentration results for higher collision
b. Greater surface area of the jar results for higher collision
c. Increasing the surrounding temperature, increases the collision
d. Length of the candle, increases the chance of collision
19. Which of the following will lower the rate of reaction since collision of reactants decrease too?
a. Adding an enzyme to the reaction.
b. Decreasing the temperature from 40oC to 10oC.
c. Breaking a chunk of calcium up into smaller pieces.
d. Increasing the amount of solute dissolved in solution.
20. What must happen before a chemical reaction can begin?
a. The activation energy must be exceeded for collision to occur.
b. The activation energy must be reached for collision to happen.
c. The concentration of reactant molecules must be reduced for collision to occur.
d. The concentrations of products and reactants must be equal for collision to occur.
21. What does the graph show about the significant of catalyst in a chemical reaction?
a.
b.
c.
d.
A chemical reaction will take place with low activation energy needed than usual
A chemical reaction will take place with higher activation energy requirement
A chemical reaction cannot have produced its product if there is no catalyst
A chemical reaction will not take place if there is no catalyst.
22.Which of the following statement is not TRUE about catalyst?
a. Chemical reaction will not take place if there is no catalyst.
b. Catalyst speed up chemical reaction
c. Catalyst used in chemical reaction is not consumed
d. Catalyst helps reaction to proceed with little activation energy needed.
23. In the equation Mg + O2(g) → MgO, how many molecules of Mg on the reactant side do we need to make our equation balance?
a. 1
b. 3
c. 2
d. 4
24. Use the following BALANCED equation: 2C2H6 + 7O2→ 4CO2 + 6H2O If 15 g of C2H6 react with 45 g of O2, how many grams of water
will be produced?
a. 22 g H2O
b. 23 g H2O
c. 27 g H2O
d. 28 g H2O
25. What is the limiting reactant in the equation in item number 24?
a. O2
b. H2O
c. C2H6
d. CO2
26. What is the excess reactant in the equation in item number 24?
a. O2
b. H2O
c. C2H6
d. CO2
27. Which of the following statement is TRUE about limiting and excess reactant?
a. Limiting reactants are consumed first while excess are not totally consumed.
b. Excess reactants are consumed first while limiting reactant are not totally consumed.
c. Limiting and excess reactants are both totally consumed if the temperature is right.
d. Limiting and excess reactants are both totally consumed if catalyst are present.
28. Energy that comes from sources that will run out or will not be replenished in our lifetimes—or even in many, many lifetimes.
a. kinetic
c. non-renewable
b. potential
d. renewable
29. What kind of renewable energy harnessed here as shown in the picture below?
a. nuclear
b. natural gas
c. fossil fuels
d. geothermal
30. Which of the following statement is TRUE on how the energy is harnessed in the diagram shown in item no. 29?
a. The water near the magma vaporizes and the vapor is catch by a pipe and used to turn a turbine attach to generator. Then,
electricity is produced
b. The magma vaporizes and catch by a pipe. The vaporized magma is used to turn a turbine attach to generator. Then, electricity is
produced
c. The soil generate biomass and catch by a pipe. The biomass is used to boil water and the vapor produced is used to turn a
turbine attach to generator. Then, electricity is produced
d. The magma produces enough energy to make the generator works thus electricity is produced.
31. How does energy is harnessed as shown in this diagram?
a.
b.
c.
d.
Waste products of animals and plants are placed in a reactor. As the waste products decomposes it produces a methane gas.
The gas is collected and used for producing fire.
Waste products from plants are placed in a reactor. As the wastes products decomposes it produces a methane gas. The gas is
collected and used for producing fire.
Waste products from animals are placed in a reactor. As the wastes products decomposes it produces electricity.
Industrial waste products are placed in a reactor. As it stays in the reactor the atom starts to decompose and changes into a
methane gas. The gas reacts to generate electricity.
32. How will you compare the product produced in item no. 30 from item no. 31?
a. In item no 30, the product produced is an electrical energy while in item no. 31, the product can be used to produced fire and
electricity
b. In item no 30, the product produced can be used to produced fire. while in item no. 31, the product is only for electrical energy.
c. The energy produced shown in item no. 30 and item no.31care both electrical energy.
d. The energy produced in item no.30 and item no. 31 are both light energy.
33. What information is provided by the product label that the soap is good for reducing water surface tension?
a. Anionic Surfactant
b. Nonionic Surfactant
c. Enzymes
d. either a or b
34. A kind of cleaning material that that is used for hand washing of glasses, plate, cutlery, and cooking utensils in a sink or bowl.
a. astringent
c. dishwashing liquid
b. bleach
d. detergent products
35. What substance provides most of the cleaning power in cleaning products?
a. antibacterial
c. enzymes
b. solvents
d. surfactants
PART II-ENUMERATION
A.
1-4 Enumerate in proper order the the nucleosynthesis process that takes place in the sun.
B.
5-7 Enumerate the Intermolecular forces that occurs in polar substances
C. 8-10 Enumerate the different terms pf intermolecular forces for non-polar substances
D. 11-14 Enumerate the 4 macromolecules
E.
15-18 Enumerate the 4 factors that affects chemical reaction
F.
19-20 What is the movement of the electron if a battery is being charged? Draw your answer! (2points)
PART III-PROBLEM SOLVING: Show the solution in your answer sheet. No solution only half of the points will be receive.
Consider the following reaction: 3𝑆𝑖 + 2𝑁2 → 𝑆𝑖3𝑁4
1.
2.
3.
When 21.44 moles of Si react with 17.62 moles of N2, how many moles of 𝑆𝑖3𝑁4 are formed? (5 points)
What is the limiting reactant? (2 points)
What is the excess reactant and how much is the excess? (3 points)
Prepared by:
Noted:
ISRAEL P. GURROBAT
Subject Teacher
MARY ROSE V. STA ROSA
Principal I