Question 1

What do you call an idea or explanation that you test through study and experimentation?

Accepted Answer

Hypothesis

Answer

Observation

Answer

Question

Answer

Conclusion

Question 2

Anything that occupies space and has mass is known as?

Accepted Answer

Matter

Answer

Botany

Answer

Science

Answer

Zoology

Question 3

Why a solution considered a homogeneous mixture?

Accepted Answer

Its components are distributed evenly

Answer

It can be dilute or concentrated

Answer

It can saturated or unsaturated

Answer

It contain a solute and solvent

Question 4

All of the following describes a solution EXCEPT __________.

Accepted Answer

Cloudy

Answer

Can be separated by physical means

Answer

Clear

Answer

Can pass through filter paper

Question 5

Which is an example of solution?

Accepted Answer

Seawater

Answer

Mayonnaise

Answer

Blood

Answer

Cooked flour

Question 6

The two components of a solution are solute and solvent. Which statement describes the solute?

Accepted Answer

It is the component of a solution in smaller quantity

Answer

It is the liquid component of a solution

Answer

It is water

Answer

It is the component of a solution in bigger quantity

Question 7

In a chemistry class, Joselito prepared a solution by mixing 25g of sugar in 80g of water. What are the concentrations of the solute and solvent in percentage by mass?

Accepted Answer

Solute: 24%, Solvent 76%

Answer

Solute: 50%, Solvent 50%

Answer

Solute: 44%, Solvent 56%

Answer

Solute: 30%, Solvent 70%

Question 8

Which statement is TRUE about element and compound?

Accepted Answer

They are homogeneous in nature

Answer

They can be broken down into simpler substances

Answer

They are the simplest form of matter

Answer

Water and carbon dioxide are example of elements

Question 9

Non-metals are brittle and are normally used as an insulator while metals are hard, dense solid material. Which of the following elements are metals and non-metals?

Accepted Answer

K and N

Answer

Sn and As

Answer

H and He

Answer

Ca and Fe

Question 10

The following substances are examples of compound EXCEPT________.

Accepted Answer

Helium gas

Answer

Carbon dioxide

Answer

Water

Answer

Sucrose

Question 11

Metals are good conductors of heat and electricity. Which element does NOT exhibit this property?

Accepted Answer

Sulfur

Answer

Aluminum

Answer

Silver

Answer

Gold

Question 12

What is the maximum amount of solute that can be dissolved in a fixed amount of solvent at a given temperature?

Accepted Answer

Solubility

Answer

Dissolution

Answer

Dilution

Answer

Solute

Question 13

All of the following affects the solubility of a solid in a liquid EXCEPT ________.

Accepted Answer

Surface area

Answer

Pressure

Answer

Temperature

Answer

Stirring

Question 14

Which of the following statements distinguishes pure substances from mixture?

Accepted Answer

Have constant boiling temperature and melting temperature

Answer

Have no specific solubility and densities

Answer

Can be separated by physical means

Answer

Consists of two or more kinds of matter

Question 15

Mixtures can be separated by physical methods while pure substances cannot be separated. Which of the following groups contain only pure substances?

Accepted Answer

Gold, copper, oxygen

Answer

Carbon dioxide, air, water

Answer

Silver, Pizza, Candies

Answer

Ammonia, vinegar, silicon

Question 16

A gaseous material has a strong smell, evaporates quickly, particularly boils at 33.34C and melts at 77.73C. This material can be classified as?

Accepted Answer

Pure substances

Answer

Mixture

Answer

Homogeneous

Answer

Solution

Question 17

Most solids dissolved faster in liquid, when the liquid is _____?

Accepted Answer

Hot

Answer

Low temperature

Answer

Regular temperature

Answer

Cold

Question 18

Elements that are in the same column are called _______?

Accepted Answer

Group

Answer

Symbol

Answer

Relative

Answer

Family

Question 19

Have no uniform appearance instead they have two or more phases of matter

Accepted Answer

Heterogeneous

Answer

Homogeneous

Answer

Solution

Answer

Solvent

Question 20

Why do you think that the sand in the beach do not dissolve in water?

Accepted Answer

Because the sand is insoluble with water

Answer

Because the sand is soluble in water

Answer

Because the sand is hard and the water is not

Answer

Because water is soluble in sand

Question 21

It is a kind of solution where it contains the maximum amount of solute dissolve in a given amount of solvent?

Accepted Answer

Saturated solution

Answer

Supersaturated solution

Answer

Unsaturated solution

Answer

Diluted

Question 22

A part of the solution that dissolves the solute is known as?

Accepted Answer

Solvent

Answer

Solubility

Answer

Suspension

Answer

Colloid

Question 23

How does temperature affect solubility?

Accepted Answer

Solubility increases with an increase temperature

Answer

Solubility decreases with increase temperature

Answer

Solubility is not affected by temperature

Answer

Solubility increases with a decrease temperature

Question 24

What is the common solvent in everyday life?

Accepted Answer

Water

Answer

Ethanol

Answer

Alcohol

Answer

Oil

Question 25

These are solutions which do not appear in nature instead they are made by man. Which is an example of manufactured solution?

Accepted Answer

Cologne

Answer

Sweat

Answer

Blood

Answer

Seawater

Question 26

Variables that are expected to change?

Accepted Answer

Dependent

Answer

Experimental Group

Answer

Controlled Group

Answer

Independent

Question 27

Which of the following substances is an element?

Accepted Answer

Iron

Answer

Sugar

Answer

Salt

Answer

Air

Question 28

5g of NaCl is added to 100ml of water. What is the percentage by mass?

Accepted Answer

5%

Answer

55%

Answer

50%

Answer

0.5%

Question 29

What are the different ways of separating mixtures?

Accepted Answer

All of the above

Answer

Evaporation

Answer

Magnetism

Answer

Distillation

Question 30

Copper, aluminum, and gold are metals. Which INCORRECTLY describes metals?

Accepted Answer

Metals are brittle

Answer

Metals are good conductors

Answer

Metals are ductile

Answer

Metals are hard and solid

Question 31

Denver was tasked by Mam Angie to investigate on how fast sugar dissolves in cold and hot water. Observing the fair testing what will be his controlled variables?

Accepted Answer

Amount of water and sugar in each cup, method of stirring, time when the solute is added to the water, how long each solution is stirred.

Answer

Amount of water and sugar in each cup, method of stirring, how long each solution is stirred.

Answer

Method of stirring, how long each solution is stirred.

Answer

Amount of water in each cup, method of stirring, time when the solute is added to the to water, how long each solution is stirred.

Question 32

How will you describe a mixture out of salt and oil?

Accepted Answer

It becomes heterogeneous mixture, the salt is immiscible to oil

Answer

It becomes homogeneous solution, the salt is miscible in water

Answer

The oil can dissolve in salt

Answer

The salt can dissolve in oil

Question 33

Daniel is planning to install the electrical wires in a newly built house. He is planning to use copper wires. What Characteristic of copper makes it ideal for electrical wirings?

Accepted Answer

Ductile

Answer

Brittle

Answer

Elastic

Answer

Malleable

Question 34

Why are copper and aluminum used for carrying electrical currents and as utensils for cooking?

Accepted Answer

They are good conductors of heat and electricity

Answer

They are brittle as solids

Answer

They are nonmetals

Answer

They are semi-metals

Question 35

Some metals like silver and gold are used in jewelry making. What property of these metals are considered for this purpose.

Accepted Answer

It is malleable

Answer

Its luxurious

Answer

It is expensive

Answer

It is shiny

Question 36

Elements play an important role in the human body. Which elements and its function are correctly paired?

Accepted Answer

Calcium: essential to formation and maintenance of the teeth and bones

Answer

Oxygen: are used to build proteins

Answer

Magnesium: maintains regular heartbeat, water balance and cell integrity

Answer

Fluorine: components of hemoglobin and myoglobin

Question 37

Why does "rust" form on some metallic materials?

Accepted Answer

All of the above

Answer

When Exposed to oxygen

Answer

When exposed in the presence of acid

Answer

Moisture is in the air

Question 38

In aqueous solution, the solvent used is?

Accepted Answer

Water

Answer

Soil

Answer

Gas

Answer

Kerosene

Question 39

Chlorine, iodine and bromine are nonmetals. What BEST distinguish a nonmetal from a metal is its?

Accepted Answer

Poor conductor of electricity

Answer

Boiling point

Answer

Luster

Answer

Ductility

Question 40

Table salt is a compound of the two elements, sodium and chlorine. Whish of the following statements is TRUE?

Accepted Answer

The symbol for sodium is Na and Chlorine is Cl

Answer

The symbol for sodium is NA and Chlorine is CL

Answer

Table salt can be found in the periodic table

Answer

The symbol for sodium is na and Chlorine is cl

Question 41

The main component of sand is?

Accepted Answer

Silica

Answer

Aluminum

Answer

Carbon

Answer

Air

Question 42

The chemical symbol for mercury is?

Accepted Answer

Hg

Answer

Mg

Answer

M

Answer

Me

Question 43

In what group number that gold and silver belong?

Accepted Answer

11

Answer

13

Answer

12

Answer

14

Question 44

Calcium chloride is a compound of the two elements, calcium and chlorine. Which of the following statements is TRUE?

Accepted Answer

The symbol for calcium chloride includes Ca and Cl

Answer

Calcium and Chlorine belong to the same group

Answer

The symbol for calcium chloride includes CA and CL

Answer

Calcium chloride is listed in periodic table of elements

Question 45

Sodium chloride dissolves in water very well. Which is NOT TRUE in the following statements?

Accepted Answer

Dissolving sodium chloride with water produces new substance

Answer

Water is pure substance

Answer

Water is a compound

Answer

Dissolving sodium chloride with water produces a mixture

Question 46

What is the percentage concentration in the following solution: 4g of sucrose in 80 g of water

Accepted Answer

4.8%

Answer

5%

Answer

5.2%

Answer

4.5%

Question 47

Something that can be dissolved in a solution is called?

Accepted Answer

Soluble

Answer

Insoluble

Answer

Immiscible

Answer

Concentrated

Question 48

How may grams of glucose are needed to prepare 400ml of a 5% glucose solution?

Accepted Answer

20g

Answer

5g

Answer

14g

Answer

10g

Question 49

What are the 2 classification of matter?

Accepted Answer

Pure substances and mixture

Answer

Homogeneous and Heterogeneous

Answer

Science and Technology

Answer

Elements and Compounds

Question 50

Which of the following is NOT an example of compound?

Accepted Answer

Oxygen

Answer

Smoke from cars

Answer

Acids

Answer

Gun powder

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