Quiz about Chemical Reactions Quizizz #1

Question 1

The substances at the beginning of a chemical equation are called the ____

Accepted Answer

reactants

Answer

product

Answer

yield

Answer

chemical symbol

Question 2

In a chemical reaction, everything to the right of the arrow is called ______________.

Accepted Answer

Products

Answer

Yields

Answer

Molecules

Answer

Reactants

Question 3

Which of the following is evidence of a chemical reaction?

Accepted Answer

fizzing

Answer

water changing to ice

Answer

saltwater

Answer

paper being cut in half

Question 4

Which of the following models best demonstrates a balanced chemical equation?

Accepted Answer

F

Answer

G

Answer

H

Answer

J

Question 5

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 6

Which of the following is NOT evidence that that a chemical reaction has occurred?

Accepted Answer

melting

Answer

produces light/heat

Answer

production of a gas

Answer

formation of a precipitate

Question 7

A different chemical substance is formed when _____.

Accepted Answer

metal rusts

Answer

water boils

Answer

ice melts

Answer

rock is crushed

Question 8

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 9

What is the conservation of mass?

Accepted Answer

mass of reactants = mass of products

Answer

mass of reactants > mass of products

Answer

mass of reactants < mass of products

Question 10

P₄ + 3O₂--> 2P₂O₃

Accepted Answer

Synthesis

Answer

Decomposition

Answer

Single displacement

Answer

Combustion

Question 11

2NO₂ --> N₂+ 2O₂

Accepted Answer

Decomposition

Answer

Synthesis

Answer

Single displacement

Answer

Combustion

Question 12

The glow stick glowed brighter in hot water because

Accepted Answer

The chemical reaction sped up in hot water

Answer

The chemical reaction slowed down in hot water

Answer

Temperature has no effect on the glow stick chemical reaction

Answer

All of the above

Question 13

When you combine vinegar and baking soda, a gas is produced. The gas produced is considered evidence that a chemical reaction occurred.

Accepted Answer

True

Answer

False

Question 14

What is the little number after an element in a chemical equation called.

Example: H₂

Accepted Answer

Subscript

Answer

Coefficient

Answer

Atom

Answer

Equation

Question 15

How many different elements are in C₆H₁₂O₆?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 16

How many Hydrogen are in 4H₂O?

Accepted Answer

8

Answer

6

Answer

2

Answer

4

Question 17

How many atoms of Hydrogen are in this compound

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 18

How many total atoms are in the compound C₂H₈O ?

Accepted Answer

11

Answer

2

Answer

8

Answer

1

Question 19

How many Aluminum are in Al₂O₃?

Accepted Answer

2

Answer

3

Answer

5

Question 20

How many atoms are there TOTAL in:
H₂SO₄

Accepted Answer

7

Answer

6

Answer

5

Answer

3

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