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FREE DOWNLOAD SECOND QUARTER EXAM in SCIENCE GRADE 9 WITH TOS School Year 2022-2023

FREE DOWNLOAD SECOND QUARTER EXAM in SCIENCE GRADE 9 WITH TOS  School Year 2022-2023

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What's inside the SCIENCE Grade 9 periodical exam?

SECOND PERIODICAL TEST IN SCIENCE 9


NAME: ____________________________ GR.& SEC._________  SCORE:________ 

_______1. Who formulated the “Uncertainty Principle”?

A. Erwin Schrodinger C. Louise de Broglie

B. James Maxwell D. Werner Heisenberg

_______2. Where are the electrons usually found according to the atomic theory?

A. In the atomic nucleus.

B. Outside the nucleus, most of an atoms’ volume is the electron cloud.

C. Outside the nucleus, yet near it because they are attracted to protons.

D. Anywhere they want to be – no particular location is more likely than any other.

_______3. What is the region around the atomic nucleus where the electron is mostly found?

A. Frequency

B. Energy Level

C. Atomic Orbital

D. Atomic Emission Spectrum

_______4. Which shows the correct order in the following atomic orbitals?

A. f orbital, d orbital, p orbital, s orbital

B. p orbital, f orbital, s orbital, d orbital

C. s orbital, d orbital, f orbital, p orbital

D. s orbital, p orbital, d orbital f orbital

_______5. Which of the following is the lowest value of that the principal quantum number may have?

A. 0 B. 1 C. 2 D. 3

_______6. How many electrons could be held in the second shell of an atom if the spin quantum number ms could have three values instead of just two? (Hint: Consider the Pauli exclusion principle)

A. 12 B. 15 C. 20 D. 24

_______7. What is the group and period of an element with an electronic configuration of 1s2 2s2 2p6?

A. Group 2 period 3 C. Group 8 period 2

B. Group 4 period 2 D. Group 8 period 4

_______8. Which orbital designation has the highest energy?

A. 2s B. 2p C. 3d D. 4s

_______9. What occurs when an electron moves from high- energy level to a low one?

A. The atom moves faster

B. Colored light is given off

C. This process is not possible

D. Another electron goes from a low energy level to a high one.

_______10. Which explains the filling up of the orbital in the order of increasing energy?

A. Octet Rule C. Pauli’s Exclusion

B. Hund’s Rule D. Aufbau Principle

_______11. Which of the following statements BEST explain why covalent compounds do not conduct electricity when dissolved in water?

A. Covalent compounds have lower melting point.

B. Covalent compounds are weakly bonded.

C. Covalent compounds dissolve into molecules.

D. Covalent compounds don’t dissolve in water since they are composed of non- polar molecules.

_______12. Which of the following substances does NOT conduct electricity?

I. salt solution                     III. salt granules

II. sugar solution                 IV. monosodium glutamate solution


A. I only C. II and III only

B. I and II only D. I and IV only

_______13. Which of the following substances do exist in solid, liquid, or gas at room temperature and normal atmospheric pressure?

I. gasoline         II. mothballs               III. salt           IV. water

A. I only C. I, II, III only

B. II only D. I, II and IV only

_______14. Which of the following pair of elements will result in nonpolar covalent compound?

A. Aluminum and Chlorine C. Sulfur and Oxygen

B. Phosphorous and Hydrogen D. Sodium and Chlorine

_______15. Which of the following compounds have low melting point?

            I. salt            III. paraffin wax

           II. sugar          IV. monosodium glutamate


A. I and II only C. I, II, and III only

B. II and III only D. II, III, and IV only

_______16. Which are TRUE about snowflakes?

I. It is a covalent compound.

II. All snowflakes are six sided.

III. II. Its chemical formula is the same as water.

IV. Its structure is the same as the crystalline lattice of an ionic compound.

A. I and II only C. I, II, and III only

B. III and IV only D. I, II, and IV only

_______17. How does voltaic cell produce electricity?

A. electrochemical cell

B. oxidation reactions

C. reduction reactions

D. oxidation and reduction reactions

_______18. Maria is working as a student assistant in their school Chemistry laboratory. Which of the following shows a direct application of knowledge about the properties of compounds as a student assistant in the Chemistry laboratory?

I. In proper storing of different substances for safety purposes.

II. In assisting students when it comes to proper usage of substances.

III. In identifying hazardous substances through reading chemical abels.

IV. In keeping records of borrowed laboratory tools and equipment in the laboratory.


A. I only C. I and II only

B. II only D. III and IV only

_______19. What do you call the ion which carry positive charge in its atom?

A. Anions C. Polyatomic ions

B. Cations D. Polymers ion

_______20. What do you call the ion which carry negative charge in its atom?

A. Anions C. Polyatomic ions

B. Cations D. Polymers ion

_______21. An element is found in Family II and Period III of the Periodic Table of elements. What is its valence electron?

A. 1 B. 2 C. 3 D. 5

_______22. What is the basis of Lewis Dot Structure?

A. Anions C. Period Number

B. Cations D. Valence Number

_______23. Which type of elements tend to gain electron/s during ionic bonding?

A. metals C. non- metal

B. metalloid D. super alloy

_______24. Which type of elements tends to lose electron/s during ionic bonding?

A. metals C. non- metal

B. metalloid D. super alloy

_______25. MgBr2is the chemical formula for magnesium bromide. What does the number “2” in the formula mean?

A. Bromine has 2+ charge

B. Bromine has 2- charge

C. There are 2 Bromine ions in every magnesium ion

D. There are 2 Magnesium ions in every bromine ion

_______26. Which of the following statement best describes organic compound? 

A. Organic compounds are composed mainly of carbon and hydrogen. 

B. Organic compounds are compounds that contain carbon atoms only. 

C. Organic compounds are compounds that are produced by living things. 

D. Organic compounds are compounds that contain carbon and oxygen only.

_______27. How do carbon atoms form many organic compounds? 

A. By attracting other elements toward themselves to form bond 

B. By sharing their electrons with other metal and non-metal elements 

C. By transferring their electrons to the atoms of surrounding elements 

D. By forming mainly bonds with other carbon atoms and other elements

_______28. How many number of bond/s the carbon atom can form?

A. 1 B. 2 C. 3 D. 4

_______29. CH4 is methane, what type of compound is this? 

A. inorganic B. organic C. reactive D. a crystal

_______30. Which are TRUE about organic compounds?

I. Organic compounds contain calcium.

II. Organic compounds contain carbon.

III. Organic compounds can be produced by living organisms.

IV. Organic compounds can be produced artificially.

A. I, II and III only C. II and III only

B. I and III only D. II, III and IV only

_______31. Why are carbon atoms able to form many organic compounds?

A. Carbon atoms attract electrons from other atoms.

B. Carbon atoms have strong attraction to other elements.

C. Carbon atoms can form many types of bonds with other carbon.

D. none of the above

_______32. Which of the following best describe inorganic compounds?

A. It contains carbon and hydrogen atom.

B. It does not contain carbon and hydrogen atom.

C. It can either be A or B.

D. None of the given.

_______33. Which of the given compound is organic? 

A.HBr B. C8H18 C. NO2 D. CuSO4


_______34. Which of the given compound is inorganic?

A.CH3OH B. CaO C. C8H18 D. C18H36O2

_______35Which of the following components makes the carbon atom a unique one? 

A. valence electron C. strength 

B. bond D. all of the above


_______36. Which of the following is utilized for artificial maturing of fruits? 

A. Acetone B. Phenol C. Acetylene D. Butane

_______37. Which of the following is broadly utilized within the oxy-acetylene welding and cutting metals?

 A. Methanol B. Acetylene C. Ethylene D. Phenol

_______38 Mary’s car halted at the center of the street. She found out that her car has run out of fuel. Which compound must she purchase?

A. Acetone B. Gasoline C. Isopropyl D. Water

_______39. Juan Victor’s grandma was cooking their dinner when she shortly stopped and said, “Oh, the tank is already empty!” Then her grandmother ask him to purchase another tank. What did Victor’s grandma instructed him to buy?

A. Acetone C. Lubricating oil

B. Formalin D. Liquefied petroleum gas (LPG

_______40. Juan Miguel needs to keep his bicycle’s parts from rusting quickly. Which of the following material do you think will Miguel utilizes?

A. Water C. Formalin

B. Isopropyl alcohol D. Lubricating oil

_______41. Michelle told her grandson, Miguel, never to play with gasoline. Why do you think she does not permit him to do it?

A. Gasoline is explosive C. Gasoline is dangerous

B. Gasoline is flammable D. all of the above

_______42. Martin Luis cut his finger inadvertently when he was cutting his nail. He applied something on his wound so that it would not get contaminated. Which compound was utilized?

A Butane C. Formalin

B. Isopropyl alcohol D. Acetone

_______43. Why is it vital to know the properties of the common fluid materials?

A. To know how these fluid work

B. To know the uses of the fluid

C. To know conceivable threat from these kinds of material

D. All of the above

_______44. Which hydro carbon compound contains a double bond within the atom?

A. ethane C. propene

B. methane D. propyne

_______45. Which of the following statements best describe organic compounds?

A. Organic compounds are compounds that contain carbon and oxygen only.

B. Organic compounds are compounds that are produced by living things

C. Organic compounds are composed mainly of carbon and hydrogen

D. Organic compounds are compounds that contain carbon atoms only

_______46. How do carbon atoms form many organic compounds?

A. By attracting other elements toward themselves to form the bonds

B. By forming many bonds with other carbon atoms and other elements

C. By sharing their electrons with other metal and non-metal elements

D. By transferring their electrons to the atoms of surrounding elements

_______47. Mang Lowel, a fisher man, went home with some of his catch and told his son to cook the fish. But his son said, “Father the stove ran out of fuel already”. Then his father told him to buy some so that they could start cooking the fish. Which organic compound do you think the boy will buy?

A. kerosene C. lubricating oil

B. gasoline D. isopropyl alcohol

_______48. Which of the following pairs of organic compounds is highly flammable?

A. gasoline, acetone

B. water, ethyl alcohol

C. lubricating oil, isopropyl alcohol

D. liquefied petroleum gas, kerosene

_______49. Christian is applying something to the ball bearings of the wheels of his bicycle so that friction will be minimized. Which of the following material do you think he is using?

A. vinegar C. kerosene

B. isopropyl alcohol D. lubricating oil

_______50. Which of these is the quantity of a substance containing the same number of particles?

A. Density C. Mole

B. Mass D. Volume

_______51. Which statement is TRUE about the different substance having the same number of moles?

A. They have equal masses.

B. They have equal numbers of particles.

C. They have equal volumes per unit mass.

D. They have the same amounts of energy.

_______52. The molecular mass of water is 18 g/mol. How many moles of water is found in 6 grams of water (H2O)?

A. 0.52 mol C. 0.33 mol

B. 1.80 mol D. 0.48 mol

_______53. What is the mass of 2.5 mol CaC12?

A. 420 g C. 120 g

B. 720 g D. 277 g

_______54. Which unit of measurement is used to represent the amount or quantity of a substance?

A. amu B. m^3 C. mg D. mol

_______55. Which formula tells the actual number of atoms in a molecule?

A. Chemical formula C. Molecular formula

B. Empirical formula D. None of the above


_______56. Which formula shows the smallest whole-number ratio of atoms of the elements in a compound?

A. Formula mass C. Molecular formula

B. Empirical formula D. Percent composition

_______57. Which quantity of matter is equivalent to the mass of 1 mole of any element?

A. Atoms C. Atomic mass

B. Compound D. Number of particles

_______58. What is the atomic mass of an atom that has 12 protons, 12 electrons, and 12 neutrons?

A. 6 amu B. 12 amu C. 24 amu D. 48 amu

_______59 How can you apply knowledge on percentage composition?

A. In maintaining the quality of food product.

B. In checking the amount of sugar present in the soft drink.

C. In identifying the correct amount of substance present in a sample.

D. all of the above


_______60. A bag of NPK fertilizer marked 16-4-8 contains 16% nitrogen, 4% phosphorous and 8% potassium, the other 72% is usually inert filler material, such as clay pellets or granular limestone. What is the mass of nitrogen present in 500g pack of NPK fertilizer?

A. 80g B. 40g C. 20g D. 10g


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