LET Reviewer - General Education (SCIENCE - Physical Science Part 2)

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Direction: Select the letter of the best answer.

1. The base unit to measure mass is _______.

a. Gram

b. Liter

c. Meter

d. Centimeter

Answer: a. Gram

2. The amount of matter in an object.

a. Mass

b. Volume

c. Matter

d. Density

Answer: a. Mass

3. What are the properties of matter?

a. No mass but occupies space.

b. Mass but occupies no space

c. Mass and occupies space.

d. No mass and occupies no space.

Answer: c. Mass and occupies space.

4. Which of the following does not belong to the group?

a. Wood

b. Brick

c. Book

d. Milk

Answer: d. Milk

  

5. Why elements are the simplest form of matter?

a. Because they are made up of atoms.

b. Because they cannot be exchanged.

c. Because they cannot be decomposed.

d. Because they are made up of substance that are inseparable.

Answer: c. Because they cannot be decomposed.

6. Which of the following does not belong to the group?

a. Lemon juice

b. Beer

c. Milk shake

d. Ice cream

Answer: d. Ice cream

7. Which one is not a property of fluid?

a. It can flow.

b. It has mass.

c. It has a definite shape.

d. We can see it.

Answer: c. It has a definite shape.

8. _______ is the temperature at which a substance changes from a liquid phase to a gas phase.

a. Evaporation

b. Boiling point

c. Celsius

d. Fahrenheit

Answer: b. Boiling point

9. _______ contains two or more elements chemically combined that cannot be physically separated.

a. Compound

b. Chemical

c. Mass

d. Mixture

Answer: a. Compound

10. Which process is the opposite of evaporation?

a. Melting

b. Freezing

c. Condensation

d. Boiling

Answer: c. Condensation

11. Which of the following best describes compounds? 

a. They can be physically separated into their constituent elements.

b. They are pure substances.

c. They have properties similar to those of their constituent elements.

d.  They have variable compositions.

Answer: b. They are pure substances.

12. _______ is a group of elements consists of Flourine, Chlorine, Bromine, Iodine and Astatine which occurs in a free state because of their highly reactive nature.

a. noble gas

b. alkali metals

c. halogens

d. metalloids

Answer: c. halogens

13. Which of the following is not a metal?

a. sodium

b. lithium

c. carbon

d. mercury

Answer: c. carbon

14. The reaction between an acid and a base which produces salt is known as _______.

a. neutralization

b. vaporization

c. fusion

d. bonding

Answer: a. neutralization

15. Which of the following is an acid?

a. NACI

b. H₂O

c. HCI

d. NaOH

Answer: c. HCI

16. A kind of mixture that is made up of a solute and a solvent is called _______.

a.  suspension

b. mixture

c. solution

d. emulsion

Answer: c. solution

17. Which of the following is not a characteristic of a gas under pressure?

a. random-moving molecules

b. liquification of gas

c. increased kinetic energy

d. collision between molecules

Answer: c. increased kinetic energy

18. What is the resultant mixture when oil and water are made to mix by adding soap?

a. a solution

b. an emulsion

c. a suspension

d. a tincture

Answer: d. a tincture

19. Which of the following is the weakest type of bond?

a. ionic or electrovalent bond

b. covalent bond

c. hydrogen bond

d. Vander Waal’s force

Answer: d. Vander Waal’s force

20. Which of the following is not an example of organic compound?         

a. Sugar

b. Acetone

c. Cyanides

d. Salt

Answer: d. Salt

21. Which of the following is commonly used as indicator of acidity?

a. Litmus paper

b. Pen

c. Cartolina

d. Alcohol

Answer: a. Litmus paper

22. The result when acid dissolved in water.

a. hydrogen peroxide

b. hydrogen ions

c. hydroxide ions

d. hydrogen

Answer: b. hydrogen ions

23. Which of the following is NOT an example of matter?

a. heat

b. water

c. smoke

d. air

Answer: a. heat

24. Vodka, rain and steel are some examples of _______.

a. Homogeneous Mixtures

b. Heterogeneous Mixtures

c. Element

d. Compound

Answer: a. Homogenous Mixtures

25. Rate of diffusion is _______.

a. increased if the temperature is increased

b. decreases if the kinetic energy decreases

c. decreases if the molecular mass is increased

d. All of the above.

Answer: d. All of the above.

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