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Science

12th Grade

Used 1+ times

Oxidation Numbers
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the oxidation number of free elements? (e.g. Na, C, Cl, Cl2, P4, O2)

-2

-1

0

+1

+2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the oxidation number of oxygen when bonded to another element?

-2

-1

0

+1

+2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the oxidation number of fluorine when bonded to another element?

-2

-1

0

+1

+2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the oxidation number of hydrogen when bonded to another non-metal element?

-2

-1

0

+1

+2

5.

DRAG AND DROP QUESTION

1 min • 1 pt

An oxidising agent ​ (a)   in oxidation number as in undergoes ​ (b)   and ​gains electrons.

A reducing agent ​ (c)   in oxidation number as it undergoes ​ (d)   and ​loses electrons.

decreases
reduction
increases
oxidation

6.

DRAG AND DROP QUESTION

1 min • 1 pt

A reducing agent ​increases in oxidation number as it undergoes ​ (a)   ​ and ​​ (b)   electrons.

An oxidising agent ​ decreases in oxidation number as in undergoes ​ (c)   and ​​ (d)   electrons.

reduction
oxidation
loses
gains

7.

DRAG AND DROP QUESTION

1 min • 1 pt

Determine the oxidation numbers in KClO4.

K: (a)  

Cl:​ (b)  

O: (c)  

-1
+1
-2
+7
+5
0

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