Quiz about Chemical Changes

Question 1

According to Arrhenius, what is the definition of an ACID?

Accepted Answer

a substance that contains hydrogen and ionizes to produce H+

Answer

a substance that contains hydroxide and ionizes to produce OH-

Answer

a substance that contains hydrogen and ionizes to produce OH-

Answer

a substance that contains hydroxide and ionizes to produce H+

Question 2

According to Bronsted-Lowry, what is the definition of an BASE?

Accepted Answer

a substance that accepts a hydrogen (H+) ion

Answer

a substance that donates a hydrogen (H+) ion

Answer

a substance that donates a hydroxide (OH-) ion

Answer

a substance that accepts a hydroxide (OH-) ion

Question 3

Which of the following is a strong acid?

Accepted Answer

nitric acid

Answer

oxalic acid

Answer

carbonic acid

Answer

acetic acid

Question 4

A substance that is 3 on the pH scale would be a(n):

Accepted Answer

acid

Answer

base

Answer

neutral

Answer

solute

Question 5

A substance that changes color when mixed with an acid or base is a(n) ___.

Accepted Answer

indicator

Answer

neutralizer

Answer

corrosive

Answer

electricity

Question 6

Since some acids seemingly "eat away" certain substances, acids are ____.

Accepted Answer

corrosive

Answer

bitter

Answer

sliipery

Answer

weak

Question 7

What color does litmus paper turn in the presence of an acid?

Accepted Answer

red

Answer

blue

Answer

black

Answer

green

Question 8

Bleach and oven cleaner are:

Accepted Answer

strong bases

Answer

strong acids

Answer

weak acids

Answer

weak bases

Question 9

Which of the following is MOST reactive?

Accepted Answer

Magnesium

Answer

Lead

Answer

Tin

Answer

Copper

Answer

Zinc

Question 10

Which metal is more reactive than calcium?

Accepted Answer

potassium

Answer

magnesium

Answer

silver

Answer

aluminum

Question 11

Choose the least reactive metal

Accepted Answer

copper

Answer

calcium

Answer

magnesium

Answer

iron

Question 12

What does displacement mean?

Accepted Answer

A chemical reaction where a more reactive metal takes the place of a less reactive metal in a compound.

Answer

A chemical reaction where a less reactive metal takes the place of a more reactive metal in a compound.

Answer

A more reactive metal is removed from a compound.

Question 13

Which statement correctly describes the 2 electrodes?

Accepted Answer

The anode is positive and the cathode is negative

Answer

The anode is negative and the cathode is positive

Answer

The anode and cathode are both positive

Answer

The anode and cathode are both negative.

Question 14

Positive ions (cations) will move towards the cathode (-) where they will discharge by....

Accepted Answer

Gaining electrons

Answer

Breaking apart

Answer

Losing electrons

Answer

Clumping together.

Question 15

Positive ions (cations) will move towards the cathode (-) where they will discharge by....

Accepted Answer

Gaining electrons

Answer

Breaking apart

Answer

Losing electrons

Answer

Clumping together.

Question 16

Which equation shows what happen to chloride ions at the anode.

Accepted Answer

2Cl^- --> Cl₂ + 2e-

Answer

Cl^- --> Cl + e-

Answer

Cl₂ - -> 2e-+ 2Cl^-

Answer

Cl₂ + 2e-_-->2Cl^-

Question 17

Choose the half-equation that shows the discharge of aluminium ion.

Accepted Answer

Al³⁺ + 3e^- --> Al

Answer

Al³⁺ - 3e^- --> Al

Answer

Al²⁺ + 3e^- --> Al

Answer

Al³⁺ --> Al + 3e^-

Question 18

Ionic compounds do not conduct electricity when they are solid because,

Accepted Answer

their ions are not free to move

Answer

their electrons are not free to move

Answer

their ions are free to move

Answer

their electrons are free to move

Question 19

What change is observed at cathode during electrolysis of aqueous copper(II) chloride using carbon electrode

Accepted Answer

pink solid deposit

Answer

Nothing

Answer

bubbles of green gas

Answer

colourless gas

Question 20

What are the ions present in molten Al₂O₃?

Accepted Answer

Al³⁺ and O^2-

Answer

Al²⁺ and O^3-

Answer

Al^2- and O³⁺

Answer

Al^3- and O²⁺

Question 21

Oxidation is loss of electron. Where does oxidation take place during electrolysis.

Accepted Answer

At anode

Answer

In the electrolyte

Answer

At the circuit

Answer

At cathode

Question 22

What is the name of the negative electrode?

Accepted Answer

cathode

Answer

anode

Question 23

What is the name of the positive electrode?

Accepted Answer

anode

Answer

cathode

Question 24

Acid + Metal --> ?

Accepted Answer

Salt + Hydrogen

Answer

Salt + Water

Answer

Salt

Answer

Hydrogen

Question 25

Iron + Hydrochloric acid --> ?

Accepted Answer

iron chloride + hydrogen

Answer

iron sulfate + water

Answer

iron + hydrogen

Answer

iron chloride + water

Question 26

Magnesium + sulphuric acid --> ?

Accepted Answer

magnesium sulfate + hydrogen

Answer

magnesium sulfate + water

Answer

magnesium chloride + hydrogen

Answer

magnesium chloride + water

Question 27

Which gas gives out a 'squeaky pop' when a lit splint is placed in it?

Accepted Answer

hydrogen

Answer

oxygen

Answer

carbon dioxide

Answer

nitrogen

Question 28

An acid reacts with a metal carbonate to produce

Accepted Answer

Salt, water and carbon dioxide

Answer

Salt, water and hydrogen gas

Answer

Limewater

Answer

Salt and water

Question 29

A neutralisation reaction produces

Accepted Answer

Salt and water

Answer

An acid

Answer

A neutral substance

Answer

Only water

Question 30

A neutralisation reaction is a reaction between

Accepted Answer

Acid and a Base

Answer

Acid and water

Answer

Base and water

Answer

None of the above

Question 31

Complete the following reaction:
Sulphuric acid + sodium carbonate
-->

Accepted Answer

Sodium sulphate + water + carbon dioxide

Answer

Carbon dioxide + water

Answer

calcium carbonate + water + carbon dioxide

Answer

Sodium chloride + water + carbon dioxide

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