wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Quiz 3 Chemistry

Total questions: 25

Worksheet time: 3615secs

Name
Class
Date
1.
Another name for a "oxidation-reduction" reaction is
a)
chemical reaction
b)
neutralization reaction
c)
redox reaction
d)
nuclear reaction
2.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

3.

In a redox reaction, the species reduced

a)

gains electrons and is the oxidizing agent

b)

loses electrons and is the oxidizing agent

c)

loses electrons and is the reducing agent

d)

gains electrons and is the reducing agent

4.

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

a)

Increased

b)

Decreased

c)

Remained Constant

d)

Varies Randomly

5.
If an atom loses electrons during a chemical reaction, the atom was:
a)
Oxidized
b)
Reduced
c)
Neutralized
d)
Precipitated
6.

Substance that oxidizes another substance by accepting its electrons.

a)

reducing agent

b)

oxidation number

c)

combustion

d)

oxidizing agent

7.

Identify the substance that is reduced in the reaction between hydrogen and iron(II) oxide.

H2 + FeO → H2O + Fe

a)

H2

b)

FeO

c)

H2O

d)

Fe

8.

Identify the substance that is oxidised in the reaction between carbon and zinc oxide.

C + 2ZnO → CO2 + 2Zn

a)

C

b)

ZnO

c)

CO2

d)

Zn

9.

Identify the oxidising agent in the reaction between copper(II) oxide and hydrogen.

CuO + H2 → Cu + H2O

a)

CuO

b)

H2

c)

Cu

d)

H2O

10.

What is the oxidation number of sulfur in H2SO4?

a)

+6

b)

+4

c)

-2

d)

0

11.

What is the oxidation number of carbon in CO2?

a)

+4

b)

-4

c)

0

d)

+2

12.

Oxidation number of S in H2S:

a)

0

b)

-2

c)

+4

d)

+6

13.

Determine the oxidation number of the following element: Helium (He)

(a)  

14.
Which statement is true:
Mg → Mg2+ + 2e–
a)
Mg gains 2 electrons
b)
Mg2+ loses 2 electrons
c)
Mg loses 1 electron
d)
Mg loses 2 electrons
15.
What element is being Oxidized?
a)
N
b)
H
c)
O
d)
S
16.
In the reaction
2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
a)
Reduced
b)
Synthesized
c)
Oxidized
d)
None of the above
17.
What is the oxidation number of N in NO2-1?
a)
-3
b)
+4
c)
-2
d)
+3
18.

What is the reducing agent here: N2 + 3H2 --> 2NH3

a)

N2

b)

H2

c)

NH3

d)

2NH3

19.
Which of the following reactions is balanced by both mass and charge?
a)
Fe+2 + Al →Fe + Al+3
b)
Cu + Fe+2 → Cu+1 + Fe+3
c)
F2 + Br- --> F- + Br2
d)
Fe+2 + 2 Cu --> 2 Cu+ + Fe
20.
What occurs at the cathode in an electrolytic cell?
a)
oxidation
b)
reduction
21.
In a voltaic cell the ions flow through the 
a)
wire
b)
salt bridge
22.

Which energy conversion shown below takes place in a voltaic cell?

a)

Electrical to chemical

b)

Mechanical to chemical

c)

Mechanical to electrical

d)

Chemical to electrical

23.
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+
24.
What coefficient would Fe+2 have in the following reaction?
___ Al + ___ Fe+2 → ___ Al+3 + ___ Fe
a)
1
b)
2
c)
3
d)
6
25.
What reaction occurs at the anode?
a)
Ag+ + e- →Ag
b)
Ag → Ag+ + e-
c)
Ni2+ + 2e- → Ni
d)
Ni → Ni2+ + 2e-

Similar Resources on Wayground

Covalent bonding + simple molecular

20 questions

Covalent bonding + simple molecular

quiz

Worksheet

•

7th - 11th Grade

sec 2 lesson 3 chapter 3

20 questions

sec 2 lesson 3 chapter 3

quiz

Worksheet

•

11th Grade

Oxi - ozon

20 questions

Oxi - ozon

quiz

Worksheet

•

10th - 12th Grade

Collision Theory and Reaction Rates

20 questions

Collision Theory and Reaction Rates

quiz

Worksheet

•

10th - 11th Grade

Benzen và đồng đẳng

20 questions

Benzen và đồng đẳng

quiz

Worksheet

•

11th Grade

Topical Test Chapter 1

20 questions

Topical Test Chapter 1

quiz

Worksheet

•

10th - 12th Grade

quiz 3 sec 2

20 questions

quiz 3 sec 2

quiz

Worksheet

•

11th Grade