Free Printable 9-11 May 2023 Békornis

1.

Which of the following general formulas represents a single-displacement reaction?

a)

AB → A + B

b)

A + B → AB

c)

A + BC → AC + B

d)

AB + CD → AD + CB

2.

The formula AB → A+B represents what type of chemical reaction?

a)

synthesis

b)

decomposition

c)

single displacement

d)

double replacement

3.

An acid/base reaction is a specific type of ___ reaction.

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

e)

Double Replacement

4.

Which of the following is NOT a type of Redox reaction (electrons gained/lost)?

a)

Single Replacement

b)

Double Replacement

c)

Combustion

d)

Decomposition

e)

Synthesis

5.

(a) reactions have 1 compound on both sides while (b) reactions have 2 compounds on both sides. (c) reactions break apart. (d) reactions combine. (e) reactions must have O₂ as a reactant & CO₂ and H₂O as products.

Choose from the below words

Single replacement

double replacement

Decomposition

Synthesis

Combustion

covalent

Covalent

Ionic

Redox

Heterogeneous

6.

The reactants will be bigger than the products in a (a) reaction. (b) reactions have 1 element and 1 compound. The products will be bigger than the reactants in a (c) reaction. Fuel and oxygen are needed in a (d) reaction. (e) reactions have 2 compounds.

Choose from the below words

decomposition

Single Replacement

synthesis

combustion

Double replacement

Covalent

Ionic

Metallic

Homogeneous

Heterogeneous

7.

Choose the correct answers:

(a) is/are combustion. (b) is/are synthesis. (c) is/are decomposition. (d) is/are single or double replacement.

Choose from the below words

#1

#2 and #3

#4

None

#2 and #4

#1 and #2

#2

#3

#1 and #3

#3 and #4

8.

What will the products of each reaction look like?

Mg + N₂ --> (a)

Zn + HCl --> (b)

AlCl₃ + Na₂SO₄ --> (c)

C₄H₈ + O₂ --> (d)

H₂O --> (e)

Choose from the below words

1 larger product

1 element + 1 compound

2 compounds

CO2 + H2O

2 smaller products

2 larger products

3 compounds

1 smaller product

9.

Put the equations in this order: decomposition, synthesis, combustion, single replacement, double replacement.

a)

b)

c)

d)

e)

1)

2)

3)

4)

5)

10.

The reactants will be bigger than the products in a (a) reaction. (b) reactions have 1 element and 1 compound. The products will be bigger than the reactants in a (c) reaction. Fuel and oxygen are needed in a (d) reaction. (e) reactions have 2 compounds.

Choose from the below words

decomposition

Single Replacement

synthesis

combustion

Double replacement

Covalent

Ionic

Metallic

Homogeneous

Heterogeneous

11.

Match the following

a)

1.

combustion

b)

2.

synthesis

c)

3.

decomposition

d)

4.

single replacement

e)

5.

double replacement

12.

2NH₃ (g) + 3CuO (s) ------ N₂ (g) + 3Cu (s) + 3H₂O (l)

Identify reduction substance

(a)

13.

What element is being Oxidized?

a)

N

b)

H

c)

O

d)

S

14.

What element is being Reduced?

a)

N

b)

H

c)

O

d)

S

15.

What are the coefficients when the equation is balanced?

a)

2 + 3 --> 2 + 3 + 4

b)

1 + 3 --> 1 + 3 + 2

c)

2 + 4 --> 2 + 3 + 2

d)

1 + 1 --> 1 + 1 + 1

16.

What element is being Oxidized?

a)

I

b)

H

c)

S

d)

O

17.

What are the coefficients when the equation is balanced?

a)

1 + 1 + 1 --> 2 + 1 + 3

b)

2 + 2 + 2 --> 4 + 2 + 3

c)

1 + 2 + 1 --> 2 + 2 + 3

d)

1 + 1 + 1 --> 1 + 1 + 1

18.

What element is being reduced?

a)

I

b)

H
H

c)

S
S

d)

O
O

19.

What is oxidation number of H in CaH₂?

a)

+1

b)

-1

c)

0

d)

+2

20.

If in a reaction, copper is reduced; its number of electrons has:

a)

Increased

b)

Decreased

c)

Remained Constant

d)

Varies Randomly

21.

If an atom loses electrons during a chemical reaction, the atom was:

a)

Oxidized

b)

Reduced

c)

Neutralized

d)

Precipitated

22.

Cl₂ + 2e- --> 2Cl ^- is an example of:

a)

a chemical reaction

b)

redox

c)

oxidation

d)

reduction

23.

What is the oxidation number of Cr in Cr₂O₇^2-?

a)

+14

b)

+6

c)

-6

d)

-14

24.

Substance that oxidizes another substance by accepting its electrons.

a)

reducing agent

b)

oxidation number

c)

combustion

d)

oxidizing agent

25.

The ionic equation shows the reaction between zinc (Zn) and hydrochloric acid.

Zn + 2H⁺ -> Zn²⁺ + H₂

What change takes place in the zinc?

a)

It gains electrons

b)

Its oxidation state increases

c)

It is reduced

d)

It gains hydrogen

26.

When a gas changes iron (III) oxide to iron (II) oxide, it shows that the gas is

a)

a reducing agent

b)

an oxidizing agent

c)

a combustible gas

d)

a diffusible gas

27.

Choose all the statements which are correct for an oxidising agent.

a)

removes hydrogen

b)

gains oxygen

c)

is reduced at the end of the reaction

d)

accepts electrons

28.

In the reaction, Fe₂O₃(s) + 3CO(g) → 2Fe(l) + 3CO₂(g)

a)

carbon monoxide is reduced

b)

carbon monoxide is the oxidising agent

c)

iron(III) oxide is oxidised

d)

iron(III) oxide is the oxidising agent

29.

State the reducing agent in this reaction.

Cu + 4HNO₃ -> Cu(NO₃)₂ + 2H₂O + 2NO₂

a)

Cu

b)

HNO₃

c)

Cu(NO₃)₂

d)

NO₂

30.

Check all the equations whereby the underlined substances has been oxidized.

a)

carbon dioxide + carbon -> carbon monoxide

b)

iron (II) oxide + aluminium -> aluminium oxide + iron

c)

copper (II) oxide + ammonia -> copper + nitrogen + water

d)

hydrogen + oxygen -> water

31.

Which coefficients are required to correctly balance the equation:
C₂S₂ + O₂ → CO₂ + S₂O

a)

1, 2, 3, 2

b)

2, 5, 4, 2

c)

2, 4, 5, 2

d)

2, 3, 5, 2

32.

In a redox reaction, the sum of all oxidation numbers should be equal to ___________ in order to be balanced.

a)

Zero

b)

Half of the number of elements

c)

Always +1

d)

Always -1

33.

Which of the following half reactions correctly represents a reduction half reaction?

a)

Fe →Fe²⁺+ 2e^-

b)

Pb⁴⁺ + 2e^- →Pb²⁺

c)

2O^-2→O₂ + 4e^-

d)

Fe + 3e^- →Fe³⁺

34.

2Pb(NO₃)₂ --> 2PbO + 4NO₂ + O₂

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Combustion

35.

What will be the result of the following:
Br₂+ NaF ->

a)

bromine will replace Na

b)

Na will replace Br

c)

Br will replace F

d)

no reaction will occur

36.

a compound having +2 oxidation state of O is

a)

H2O

b)

H2O2

c)

OF2

d)

O2F2

9-11 May 2023 Békornis

Total questions: 36

Worksheet time: 1hrs 11mins

Similar Resources on Wayground