Socorro National High school
Socorro, Surigao del Norte
1st Quarter Examination
Science - Grade 7
Name: _________________________________ Score: ______
Grade/Section: __________________________Date: ___
__
MULTIPLE CHOICE. Choose the letter of the best answer. Write
your answer on the space provided before each number.
_____1. A solution in which no more solid will dissolve is called
a. Insoluble
c. Solubility
b. Saturated
d. Soluble
_____2. Solution is a homogenous mixture. Which of the following
is an example of a solution?
a. Mud in a water
c. Mango shake
b. Ice cream
d. Vinegar
_____3. What is the most comment solvent in everyday life?
a. Carbon containing chemicals
b. Ethanol
c. Water
d. All of the above
_____4. How does temperature affect solubility?
a. Solubility is not affected by temperature
b. Solubility decreases with an increase in temperature
c. Solubility increases with an increase in temperature.
d. Solubility increases with a decrease in temperature.
_____5. The rate of solution is a measure of how fast a substance
dissolves. What are the factors that determine the rate of
solution?
a. Stirring
b. Temperature
c. Amount solute already dissolved
d. Time
_____6. What are the main factors that affect solubility?
a. Temperature
c. Nature of solute and solvent
b. Pressure
d. All of the above
_____7. As the temperature of a liquid solvent increases, the
amount of solute that can dissolve in it
a. decreases by one degree Celsius for every milliliter
of solvent
b. increases
c. decrease
d. remains constant
_____8. Which of the following terms refers to a solution that
contains the maximum quantity of solute at a given temperature?
a. supersaturated solution
b. aqueous solution
c. saturated solution
d. unsaturated solution
_____9. There are solution which do not appear in nature instead
they are made by man. Which is an example of manufactured
solution?
a. Seawater
c. Cologne
b. Blood
d. Air
_____10. In a sugar solution, which component of the solution is
a solute?
a. Water
c. Salt
b. Sugar
d. Milk powder
_____11. Sophia wants to make a juice after lunch. What makes
the powdered juice dissolve faster?
a. Add water
c. Pour sugar
b. Wait until it will mixed d. Stir very well
_____12. Which of the following is an example of suspension?
a. Toothpaste
c. Salt in a water
b. Sand in a water
d. Smoke
_____13. To determine whether the mixture is a solution or not,
the following are its characteristics, EXCEPT;
a. Clear
c. Homogeneous
b. Transparent
d. Can be filtered
_____14. How will you describe a mixture out of salt and oil?
a. The oil can dissolved into the salt.
b. The oil can only dissolved a little bit of a salt.
c. It becomes a homogenous solution, the salt is
miscible into the oil.
d. It becomes a heterogeneous mixture, the salt is
immiscible into the oil.
_____15. Which statement describes the solute?
a. It is the solid formed in solution
b. It is the liquid part of the solution
c. It is the component of a solution in smaller amount
d. It is the component of a solution in bigger amount
_____16. 5.45 g of NaCl is added to 100 mL of water. What is its
percentage by mass?
a. 2.23%
c. 5.23%
b. 5.17%
d. 4.23%
_____17. Which value corresponds to the pH of pure water?
a. 7
c. 6
b. 14
d. 3
_____18. Which of the following example is commonly found in
carbonic acid?
a. Sour milk
c. Vinegar
b. Softdrinks
d. Fruits
_____19. Litmus paper is an acid and base indicator. When red
litmus paper changes to blue, the sample is?
a. Neutral
c. Basic
b. Acidic
d. None
_____20. Litmus paper is an acid and base indicator. When blue
litmus paper changes to red, the sample is?
a. Neutral
c. Basic
b. Acidic
d. None
_____21. Which statement best describe the characteristics of a
base?
a. A base is bitter to taste
b. A base can neutralize acid
c. A base is slippery to touch
d. All of the above
_____22. What type of substance is a Sodium Chloride?
a. Acid
c. Salt
b. Base
d. Sugar
_____23. Acids can evenly found in our body. An acid to our
stomach help digest food that we eat. Which of the following acids
contain in our stomach?
a. Nitric acid
c. hydrochloric acid
b. Sulfuric acid
d. Carbonic acid
_____24. Neutralization occurs in our daily life activities. When
you are bitten with a bee, the sting is a base. How are you going
to treat the sting?
a. Apply a week acid solution
b. Wash water to the effected part
c. Never mind the sting, it will vanish after 5 minutes
d. Apply soap to clean the affected part
_____25. The pH scale was made and used to distinguish the
acidity and basicity of a substance we use daily. Which of the
following is true?
a. pH of less than 7 is basic; pH of more than 7 is
acidic.
b. pH of less than 7 is acidic; pH of more than 7 is
basic.
c. Both a and b
d. None of the above
_____26.Which one of the following substances is NOT an
example of an everyday base?
a. Household bleach
c. Baking powder
b. Oven cleaner
d. Lemon juice
_____27.Which one of the following substances is NOT an
example of an everyday acid?
a. Orange juice
c. Toothpaste
b. Vinegar
d. Rain water
_____28. If suffering from an upset stomach, you may use a
remedy such as Andrews, Gaviscon, Rennie, Alka-Seltzer etc.
These are all examples of
a. Salts
c. Acids
b. Pain-killers
d. Bases
_____29. What method in separating mixture when you are
separating sand from gravel?
a. Sieving
c. Flotation
b. Evaporating
d. Decantation
_____30. How do you classify the following mixtures? (milk,
paints, gel, ice cream and mayonnaise)
a. All these are elements
b. All these are pure substance
c. All these are homogenous mixture
d. All these are heterogeneous mixture
_____31. Which is an example of filtration?
a. Straining of mongo seeds through filter
b. Removing salt content from salt water
c. Separating components of petroleum
d. Separating oil from water
_____32. Which process can separate sulfur and iron filling when
we put together?
a. Decantation
c. Magnetic separation
b. Filtration
d. Evaporation
_____33. A solid can be separated from a solution using
a. Condensation
c. Freezing
b. Evaporation
d. Melting
_____34. Which is NOT true about the characteristics of mixture?
a. Mixtures are may be homogenous or
heterogeneous
b. Mixtures are made up of two or more components
c. Mixtures may be separated by physical means
d. Mixtures may be separated by chemical means
_____35. Which statement is TRUE regarding pure substance?
a. Pure substance is made up of one kind of
molecules
b. Pure substance cannot be separated by any
physical means
c. Pure substance can be elements or compounds
d. All of the above
_____36. Which ONE of the following is NOT a property of an
acid?
a. It turns litmus red
b. It has a sour taste
c. Its pH is greater than 7
d. It reacts with metals to produce hydrogen gas
_____37. Two substances physically combined and that appears
the same throughout is classified as
a. A homogeneous mixture
c. An element
b. A heterogeneous mixture
d. A compound
_____38. Which of the following is a way in which elements and
compounds are similar?
a. Elements and compounds are both pure
substances.
b. Elements and compounds are both listed on the
periodic table.
c.
Elements and compounds are both made up of
different kinds of atoms.
d. Elements and compounds can both be broken
down by physical changes.
_____39. What type of substance is always made up of a single
type of atom?
a. Mixture
c. Molecule
b. Element
d. Compound
_____40. What kind of pure substance forms when two elements
chemically combine?
a. an element
c. a mixture
b. a compound
d. a solution
_____41. When materials combine to form a mixture, they
a. Keep their original properties.
b. React to form a new substance with new
properties.
c. Combine in a specific ratio.
d. Always change their physical state.
_____42. One of the following substances is not an element.
Which one is it?
a. Hydrogen
c. Water
b. Nitrogen
d. Mercury
_____43. Which one of the following is a good conductor of
electricity?
a. Iron
c. Wood
b. Plastic
d. Glass
_____44. The property of metal by which it can be drawn into
wires is called
a. Conductivity
c. Ductility
b. Malleability
d. Decorating
_____45. ______________ describes the way a substance
reflects light, or SHINES.
a. Magnetism
c. Luster
b. Brittleness
d. Ductility
_____46. ______________ describes how well the substance
can be hammered into sheets.
a. Malleability
c. Ductility
b. Conductivity
d. Luster
_____47. If a substance breaks easily, it is said to be
a. Magnetic
c. Brittle
b. Conductive
d. Ductile
_____48.which is the symbol of Pb?
a. Mercury
c. Lead
b. Polonium
d. Phosphorus
_____49. Which is NOT true about the properties of metal?
a. Metals are soft and bend or break easily.
b. Metals can be drawn into a wire.
c. Metals usually have high melting points.
d. Metals are usually silver-grey in color.
_____50. Which is true about the properties of a nonmetal?
a. Nonmetals are not malleable or not ductile
b. Nonmetals are usually good conductors or heat
and electricity.
c. Both a and b
d. None of the above