Quiz about Science 10 Chemical Reactions

Question 1

Melting Ice

Accepted Answer

Physical Change

Answer

Chemical Change

Question 2

Cutting Paper

Accepted Answer

Physical Change

Answer

Chemical Change

Question 3

Frying Eggs

Accepted Answer

Chemical Change

Answer

Physical Change

Question 4

Toasting Bread

Accepted Answer

Chemical Change

Answer

Physical Change

Question 5

Burning Wood

Accepted Answer

Chemical Change

Answer

Physical Change

Question 6

Rotting Fruit (Like a brown banana)

Accepted Answer

Chemical Change

Answer

Physical Change

Question 7

Dissolving salt in water

Accepted Answer

Physical Change

Answer

Chemical Change

Question 8

Boiling Water

Accepted Answer

Physical Change

Answer

Chemical Change

Question 9

What is the process by which a chemical change occurs?

Accepted Answer

Chemical reaction

Answer

Conservation of Matter

Answer

Physical Change

Answer

Condensation

Question 10

What always happens during a chemical change?

Accepted Answer

The material and its properties change

Answer

The material dissolves

Answer

The total mass of the material changes

Answer

The material changes state from a solid to a liquid

Question 11

What is the best definition of a chemical change?

Accepted Answer

A change in the state of matter in which the material changes into an entirely different material with properties that are different from the original material.

Answer

A change in the state of matter in which the form changes but the properties stay the same.

Answer

A change in the state of matter in which the material is still the same just in a different form.

Question 12

Which is not a sign that a chemical reaction has occurred.

Accepted Answer

A change in mass

Answer

bubbling

Answer

production of an odor or smell

Answer

change in color

Question 13

Which is not evidence that a chemical reaction has occured

Accepted Answer

freezing

Answer

Production of flames

Answer

Change in temperature or heat

Answer

Production of light

Question 14

Conservation of matter applies to physical and chemical changes

Accepted Answer

True

Answer

False

Question 15

The total mass after a chemical reaction is that same as the total mass before a chemical reaction

Accepted Answer

True

Answer

False

Question 16

The mixing of two or more substances can result in a new substance.

Accepted Answer

True

Answer

False

Question 17

Anything that has mass and occupies space (volume)

Accepted Answer

Matter

Answer

Density

Answer

Chemistry

Answer

Weight

Question 18

A substance that always has the same composition and characteristics is called ______________________

Accepted Answer

a pure substance

Answer

A mixture

Answer

homogeneous

Question 19

A substance that cannot be broken down into a simpler substance is called ______________

Accepted Answer

an element

Answer

a mixture

Answer

a componud

Answer

a suspension

Question 20

what is the symbol for gold?

Accepted Answer

Au

Answer

Ag

Answer

G

Answer

Gd

Question 21

Which of the following is a heterogeneous mixture?

Accepted Answer

mixed nuts

Answer

salt water

Answer

tea

Answer

milk

Question 22

what needs to be present for the combustion of a material?

Accepted Answer

oxygen

Answer

water

Answer

nitrogen

Answer

weather

Question 23

Sodium's chemical symbol is...

Accepted Answer

Na

Answer

S

Answer

So

Answer

K

Question 24

The atomic number of an element is based on the

Accepted Answer

number of protons in the nucleus

Answer

mass of its nucleus

Answer

number of electrons around its core

Answer

number of neutrons in its nucleus

Question 25

What parts of the atom move around the nuclues

Accepted Answer

electrons

Answer

atomic mass units

Answer

protons

Answer

neutrons

Question 26

Which particles in atoms have a negative charge

Accepted Answer

electrons

Answer

protons

Answer

neutrons

Answer

nuclei

Question 27

The _____________is the very small center of an atom

Accepted Answer

nucleus

Answer

core

Answer

proton

Answer

neutron

Question 28

How many atoms are in Cl₂

Accepted Answer

2

Answer

1

Answer

3

Answer

215

Question 29

True or False? Vertical rows in the periodic table are called groups.

Accepted Answer

True

Answer

False

Question 30

The noble gases are located where on the periodic table?

Accepted Answer

far right

Answer

far left

Answer

middle

Question 31

all matter is made of what

Accepted Answer

atoms

Answer

energy

Answer

electrons

Answer

compounds

Question 32

What is the first element of the periodic table

Accepted Answer

Hydrogen

Answer

Gold

Answer

Red

Answer

Carbon

Question 33

What is an ion?

Accepted Answer

An atom where the # of protons is not equal to the # of electrons

Answer

When the # of protons is equal to the # of electrons

Answer

Taylor Swift's new album

Answer

Als het aantal deeltjes hetzelfde is

Question 34

In the compound 2H₂, the "₂" stands for

Accepted Answer

it's the subscript, it means there are two H bonded together

Answer

it means there are "2" many molecules

Answer

is a coefficient

Question 35

What is a valence electron?

Accepted Answer

Electrons in the outermost shell; they are the electrons involved in bonding

Answer

They are the power house of the atom

Answer

The only atom of importance

Answer

not the answer

Question 36

A chemical reaction in which two or more simpler substances combine to form a more complex substance is called

Accepted Answer

Synthesis

Answer

Decomposition

Answer

Single-Replacement

Answer

Double-Replacement

Question 37

A chemical reaction in which a more complex substance is broken down into simpler substances is called

Accepted Answer

Decomposition

Answer

Synthesis

Answer

Single-Replacement

Answer

Double-Replacement

Question 38

A chemical reaction in which one element (or compound) replaces another is called

Accepted Answer

Single-Replacement

Answer

Synthesis

Answer

Decomposition

Answer

Double-Replacement

Question 39

A chemical reaction in which two elements (or compounds) replace one another is called

Accepted Answer

Double-Replacement

Answer

Synthesis

Answer

Decomposition

Answer

Single-Replacement

Question 40

The Law of Conservation of Mass states that

Accepted Answer

atoms cannot be created or destroyed

Answer

atoms combine to form compounds

Answer

pure substance have consistent properties

Answer

what goes up, must come down

Question 41

H₂0 --> H₂ and O_{2
To balance this equation...}

Accepted Answer

Place a coefficient of 2 in front of the H₂0; a coefficient of 2 in front of the H₂

Answer

Place a coefficient of 2 in front of the H₂0

Answer

Place a coefficient of 2 in front of the H₂0; a coefficient of 2 in front of the H_2;and coefficient of 2 in front of the O₂

Answer

Add a subscript 2 to the oxygen on the reactant side

Question 42

H₂0 --> H₂ and O_{2 is a balanced equation}

Accepted Answer

False

Answer

True

Question 43

To balance a chemical equation, you must add or change

Accepted Answer

coefficients

Answer

subscripts

Answer

formulas

Answer

symbols

Question 44

Metals are most likely to

Accepted Answer

lose electrons

Answer

gain electrons

Answer

not form compounds

Answer

form negative ions

Question 45

Non-metals are most likely to

Accepted Answer

gain electrons

Answer

lose electrons

Answer

form positive ions

Answer

conduct electricity

Question 46

This type of diagram shows all of the electrons of an atom (or ion) in shells surrounding the nucleus

Accepted Answer

Bohr

Answer

Lewis

Question 47

a reaction in which a substance reacts with oxygen to produce heat and light is called

Accepted Answer

combustion

Answer

single-replacement

Answer

decomposition

Answer

synthesis

Question 48

Exothermic reactions produce heat, like hot packs.

Accepted Answer

True

Answer

False

Question 49

A chemical reaction or process that absorbs heat from the surroundings

Accepted Answer

Endothermic

Answer

Exothermic

Question 50

What is the formula for sodium bromide?

Accepted Answer

NaBr

Answer

NaBr2

Answer

Na2Br

Answer

SoBr

Question 51

What is the formula for diphosphorus pentoxide?

Accepted Answer

P2O5

Answer

PO5

Answer

P5O2

Answer

Po2O5

Question 52

What is the name for SiCl₄?

Accepted Answer

silicon tetrachloride

Answer

silicon quadchloride

Answer

monosilicon tetrachloride

Answer

silicon chloride

Question 53

What is the name for BrO₃?

Accepted Answer

bromine trioxide

Answer

bromine oxide

Answer

monobromine trioxide

Answer

bromide trioxide

Question 54

What is the name of the compound with the formula Ba₃P₂?

Accepted Answer

barium phosphide

Answer

barium diphosphide

Answer

tribarium diphosphide

Answer

barium phosphorous

Question 55

What is the formula for magnesium chloride?

Accepted Answer

MgCl2

Answer

MgCl

Answer

Mg2Cl

Answer

Mg(ClO₃)₂

Question 56

What is the formula for copper(I) sulfate?

Accepted Answer

Cu2SO4

Answer

CuSO3

Answer

CuSO4

Answer

Cu2SO3

Question 57

What is the name of the compound LiOH?

Accepted Answer

lithium hydroxide

Answer

lithium hydrogen oxide

Answer

lithium hydride

Answer

lithium oxide hydride

Question 58

What is the chemical formula for an ionic compound of potassium and oxygen?

Accepted Answer

K2O

Answer

KO

Answer

K2O2

Answer

KO2

Question 59

What is the name for the compound CaCO₃?

Accepted Answer

Calcium carbonate

Answer

Calcium carbon oxide

Answer

Calcium (II) carbonate

Answer

Carbon carbonate

Question 60

What is the formula for sodium nitrate?

Accepted Answer

NaNO3

Answer

Na3NO

Answer

NaNO2

Answer

Na3NO3

Question 61

What is the name for As₄O₁₀?

Accepted Answer

tetraarsenic decoxide

Answer

arsenic oxide

Answer

arsenide decoxide

Answer

arsenic decoxide

Question 62

Name the acid: HC₂H₃O₂

Accepted Answer

Acetic Acid

Answer

Acetous Acid

Answer

Hydrogen Acetate

Answer

Hydrogen Dicarbon Trihydrogen Dioxygen

Question 63

What is the formula for phosphorous acid?

Accepted Answer

H3PO3

Answer

H3PO4

Answer

H2PO4

Answer

H3P

Question 64

What is the formula for Hydrosulfuric Acid?

Accepted Answer

H2S

Answer

H₂(SO₃)

Answer

H₂(SO₂)

Answer

H₂(SO₄)

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