Quiz about Amplify Chemical Reactions

Question 1

the starting materials in a chemical reaction

Accepted Answer

Reactants

Answer

Products

Answer

Starters

Answer

Enders

Question 2

The substances listed on the right side of a chemical equation are the

Accepted Answer

Products

Answer

Yields

Answer

Reactants

Answer

Precipitates

Question 3

The process by which one or more substances change to produce one or more different substances

Accepted Answer

Chemical Reaction

Answer

Chemical Process

Answer

Reactant

Question 4

What are Chemical Reactions?

Accepted Answer

a process in which atoms rearrange to form new substances

Answer

It's when you mix substances.

Answer

When something bubbles.

Answer

letter and numbers showing the types and number of atoms

Question 5

$$6CO_2+\ 6H_2O\ \rightarrow\ C_6H_{12}O_{6\ }+\ 6O_2$$

The carbon atoms are balanced with ____ on each side of the reaction.

Accepted Answer

6

Answer

1

Answer

2

Question 6

Determined whether the following equation is balanced or unbalanced. Ag + O_{2 --->}2Ag₂O

Accepted Answer

Unbalanced

Answer

Balanced

Question 7

Determine whether the following equations is balanced or unbalanced. H₄+ O₂---> 2H₂O

Accepted Answer

Balanced

Answer

Unbalanced

Question 8

Determine whether the following equation is balanced or unbalanced. H₂+ Br₂---> 2HBr

Accepted Answer

Balanced

Answer

Unbalanced

Question 9

Determine whether the following equation is balanced or unbalanced. 2Fe + 3Cl₂---> FeCl₃

Accepted Answer

Unbalanced

Answer

Balanced

Question 10

The law of conservation of mass states that....

Accepted Answer

Matter can neither be made or destroyed

Answer

Matter can be made

Answer

Matter can be destroyed

Answer

Matter can evaporate

Question 11

Is the following equation balanced or unbalanced?
Fe + S --> FeS

Accepted Answer

balanced

Answer

unbalanced

Question 12

Is this balanced?...
Al + O₂ --> 2Al₂O₃

Accepted Answer

NO!

Answer

Yes!

Question 13

Determine whether the following equation is balanced or unbalanced. 4P +5O_{2 --->}2P₂O₅

Accepted Answer

Balanced

Answer

Unbalanced

Question 14

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂--> 2Al₂O₃

Accepted Answer

4

Answer

2

Answer

6

Answer

1

Question 15

The number written next to an element in the bottom corner

Accepted Answer

subscript

Answer

catalyst

Answer

chemical change

Answer

temperature

Question 16

Changing the state of water from ice melting into water is a

Accepted Answer

physical change

Answer

catalyst

Answer

chemical change

Answer

Precipitate

Question 17

This forms when chemicals in 2 liquids react to form a solid

Accepted Answer

Precipitate

Answer

subscript

Answer

compound

Answer

product

Question 18

What kind of change is cutting paper?

Accepted Answer

Option A is correct

Answer

B.

Question 19

What kind of change is frying an egg?

Accepted Answer

Option B is correct

Answer

A.

Question 20

What kind of change is burning wood?

Accepted Answer

Option B is correct

Answer

A.

Question 21

What kind of change is a melting popsicle?

Accepted Answer

Option A is correct

Answer

B.

Question 22

Which of these is not a chemical reaction?

Accepted Answer

Melting of ice

Answer

Burning of wood

Answer

Milk going bad

Answer

Mixing vinegar and baking soda

Question 23

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have?

Accepted Answer

4g

Answer

5g

Answer

9g

Answer

14g

Question 24

A reaction that releases energy in the form of heat is known as . . .

Accepted Answer

an exothermic reaction

Answer

a synthesis reaction

Answer

a decomposition reaction

Answer

an endothermic reaction

Question 25

A reaction that absorbs energy in the form of heat is known as . . .

Accepted Answer

an endothermic reaction

Answer

a synthesis reaction

Answer

an exothermic reaction

Answer

a decomposition reaction

Question 26

a change to a substance that happens without forming a new substance

Accepted Answer

physical change

Answer

chemical change

Answer

double replacement reaction

Answer

combustion

Question 27

Which one shows that a chemical reaction has occurred?

Accepted Answer

formation of a gas

Answer

dissolving

Answer

melting

Answer

bending

Question 28

The glow stick reaction is a

Accepted Answer

Chemical change

Answer

Physical change

Question 29

During a chemical reaction, atoms can

Accepted Answer

be rearranged to form a new substance

Answer

be destroyed to form a new substance

Answer

be created to form a new substance

Question 30

How can a chemical equation be balanced?

Accepted Answer

adding coefficients

Answer

changing subscripts

Answer

erasing elements as necessary

Answer

adding elements as necessary

Question 31

What are the products in the equation?

Accepted Answer

ZnSO₄ and Cu

Answer

Zn and CuSO₄

Answer

Zn and Cu

Answer

Zn only

Question 32

What type of reaction is present in the unbalanced equation, NaOH + KNO₃ ---> NaNO₃ + KOH

Accepted Answer

double replacement

Answer

combination

Answer

decomposition

Answer

combustion

Question 33

What type of reaction is present in the unbalanced equation, Fe + NaBr --> FeBr₃ + Na

Accepted Answer

single replacement

Answer

combustion

Answer

double replacement

Answer

acid-base

Question 34

Which of the following best describes the combustion reaction?

Accepted Answer

hydrocarbon combines with oxygen to produce CO₂and H₂O

Answer

hydrogen combines with CO₂ to produce O₂and H₂O

Answer

hydrocarbon combines with H₂O to produce CO₂and O₂

Answer

CO₂combines with oxygen to produce hydroxideand H₂O

Question 35

Which of the following is the balanced equation for Zn + HCl --> ZnCl2 + H2?

Accepted Answer

Zn + 2HCl --> ZnCl₂ + H₂

Answer

Zn + HCl --> 2ZnCl₂ + H₂

Answer

2Zn + HCl --> 2ZnCl₂ + H₂

Answer

Zn + 2HCl --> 2ZnCl₂ + H₂

Question 36

The Law of Conservation of Mass states that in a chemical reaction,

Accepted Answer

mass of the reactants and mass of the products are equal

Answer

new elements are formed

Answer

new atoms are created

Answer

atoms are destroyed

Question 37

(NH₄)₂Cr₂O₇ How many H are in this atom?

Accepted Answer

8

Answer

2

Answer

4

Answer

6

Question 38

Mr. Carmen asked his class to observe the following events:

*steel wool rusting

*wooden splints burning down to ashes

*sandstone crumbling when tapped with a hammer

*an antacid tablet releasing carbon dioxide bubbles in water

Which of the events produced a physical change?

Accepted Answer

sandstone crumbling when tapped with a hammer

Answer

steel wool rusting

Answer

wooden splints burning down to ashes

Answer

an antacid tablet releasing carbon dioxide bubbles in water

Question 39

Which process involves ONLY a physical change?

Accepted Answer

an ice cube melting

Answer

a nail rusting

Answer

an egg cooking

Answer

a candle burning

Question 40

Which of the following is NOT a chemical property?

Accepted Answer

state of matter

Answer

photosensitivity

Answer

combustability

Answer

flammability

Question 41

In a chemical reaction, (aq) written after a compound means that:

Accepted Answer

the compound is dissolved in water.

Answer

the compound is flammable.

Answer

the compound will melt.

Answer

the compound is unstable.

Question 42

The smallest amount of energy needed for a chemical reaction to begin is called its _______.

Accepted Answer

activation energy

Answer

excess reactant

Answer

endothermicity

Answer

limiting reactant

Question 43

During a _______ reaction, the first element in two different compounds swap places to form two completely new compounds.

Accepted Answer

double displacement

Answer

synthesis

Answer

decomposition

Answer

single displacement

Question 44

Evidence of an endothermic reaction is that it:

Accepted Answer

gets cold

Answer

gets hot

Answer

gives off sounds

Answer

gives off light

Question 45

Cu(OH)2 --> CuO + H2O

Accepted Answer

decomposition

Answer

synthesis

Answer

single replacement

Answer

double replacement

Question 46

Al + CuSO4 --> Al2(SO4)3 + Cu

Accepted Answer

single replacement

Answer

decomposition

Answer

synthesis

Answer

double replacement

Question 47

N2 + H2 --> NH3

Accepted Answer

synthesis

Answer

single replacement

Answer

double replacement

Answer

combustion

Question 48

C3H8 + O2 --> CO2 + H2O

Accepted Answer

combustion

Answer

single replacement

Answer

double replacement

Answer

synthesis

Question 49

A change in the shape of an object is an example of _________________.

Accepted Answer

a physical change

Answer

a chemical change

Answer

energy

Answer

an endothermic change

Question 50

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

Accepted Answer

H2SO4

Answer

H3PO4

Answer

HCIO3

Answer

H20

Question 51

A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?

Accepted Answer

burning a piece of paper

Answer

cutting a piece of paper

Answer

folding a piece of paper

Answer

tearing a piece of paper

Question 52

Which of the following describes a precipitate?

Accepted Answer

a solid forms when one liquid is poured into another

Answer

a liquid forms when a block of metal is heated

Answer

a gas forms when a solid is placed in a liquid

Answer

bubbles form when an acid is poured on a rock

Question 53

NaHCO₃ is an example of

Accepted Answer

a compound

Answer

an abbreviation

Answer

a mixture

Answer

an element

Question 54

What is an example of an element?

Accepted Answer

Oxygen

Answer

Pure water

Answer

Air

Answer

Table salt

Question 55

What are the products of the chemical reaction pictured?

Accepted Answer

CO₂ and 2 H₂O

Answer

CH₄ and CO₂

Answer

CH₄ and O₂

Answer

O₂ and H₂O

Question 56

This is used to represent the number of each atom being represented.

Accepted Answer

The Subscript

Answer

A Exponent

Answer

The Coefficient

Answer

A Molecule

Question 57

An __________ chemical reaction releases more energy than it absorbs.

If the products have a lower bond energy than the reactants.

Accepted Answer

exothermic

Answer

endothermic

Answer

activation

Answer

reactant

Question 58

How many hydrogen atoms are there in a water molecule?

Accepted Answer

2

Answer

0

Answer

3

Answer

4

Question 59

You have a large glass of water and you stir salt into it until all the salt completely dissolves.

Accepted Answer

Physical Change

Answer

Chemical Reaction

Question 60

Which of the following is the best evidence that a physical change taken place

Accepted Answer

Apple is cut into halves

Answer

Apple turns brown

Answer

Apple is ripping and spoiled

Question 61

If sample A is melted when heated it is

Accepted Answer

Physical change

Answer

Chemical Change

Question 62

Which of the following is Not True with respect to the neutralisation reaction?

Accepted Answer

Reactants are in gaseous state.

Answer

Salt is formed.

Answer

Reaction occurs between an acid and a base

Answer

Reactive element displaces less reactive element.

Question 63

It is necessary to balance a chemical equation in order to satisfy the law of

Accepted Answer

Conservation of mass

Answer

Conservation of motion

Answer

Conservation of momentum

Answer

Conservation of energy

Question 64

What force holds two atoms together?

Accepted Answer

Chemical bond

Answer

Compound

Answer

Electric Energy

Answer

Reactants

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