Free Printable Redox

1.

What ion does element Calcium (Ca) makes?

a)

$Ca^+$

b)

$Ca^{2+}$

c)

$Ca^{3+}$

d)

$Ca^{4+}$

2.

What ions will element alumunium (Al) makes?

a)

$Al^{2+}$

b)

$Al^{3+}$

c)

$Al^{2-}$

d)

$Al^{3-}$

3.

Nitrate ions has a charge of

a)

1+

b)

2+

c)

1-

d)

2-

4.

Which of the following is the symbol for sulphate ion?

a)

$SO_4\ ^{2-}$

b)

$SO_3\ ^-$

c)

$SO_2\ ^{3-}$

d)

$S^{2-}$

5.

What is the oxidation state for element Nitrogen (N) in $KNO_3$ ?

a)

+2

b)

+3

c)

+4

d)

+5

6.

Element copper only has 1 type of ion, that is $Cu^{2+}$ ion

a)

True

b)

False

7.

What's the name of a compound with formula $Fe_2O_3$ ?

a)

Iron oxide

b)

Iron (II) oxide

c)

Iron (III) oxide

d)

None of the answers are correct

8.

When two ions $Fe^{2+}$ and $Cl^-$ forms a compound, what is the formula of the compound?

a)

$FeCl$

b)

$FeCl_2$

c)

$FeCl_3$

9.

Is the reaction below reduction or oxidation?

$2Br^-\rightarrow Br_2\ +2e^-$

a)

Reduction because Br- lose electron

b)

Reduction because Br- gain electron

c)

Oxidation because Br- lose electron

d)

Oxidation because Br- gain electron

10.

which statement is correctly describing reaction below:

$Mg^{2+}+2e^-\rightarrow Mg$

a)

Reduction because Mg2+ gain electron

b)

Reduction because Mg2+ lose electron

c)

Oxidation because Mg2+ gain electron

d)

Oxidation because Mg2+ lose electron

11.

Which of the following acts as the reducing agent in this reaction?

$CuNO_3+K\ \rightarrow KNO_3+Cu$

a)

CuNO3

b)

K

c)

KNO3

d)

Cu

12.

Which of the following is the ionic equation for following reaction:

$2K+F_2\rightarrow2KF$

a)

$2K^++2F_{ }^-\rightarrow2KF$

b)

$2K_{ }^++F_2\rightarrow2KF$

c)

$2K+F_2\rightarrow2K^++2F^-$

d)

$K_2+F_2\rightarrow2K^++F^-$

13.

For the following reaction:

$2CuSO_4+4KI\rightarrow2CuI+I_2+2K_2SO_4$

Which element underwent reduction process

a)

$Cu$

b)

$K$

c)

$I$

d)

$None\ of\ the\ above$

14.

What's the oxidation state for element phosphorus (P) in $PO_4^{ }\ ^{3-}\$ ion?

a)

+7

b)

+5

c)

+3

d)

+1

15.

This compound is used to check the presence of reducing agent by changing its purple color to colorless in the presence of reducing agent

a)

KMnO4

b)

K2SO4

c)

KI

d)

KHPO4

Redox

Total questions: 15

Worksheet time: 11mins

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