Diagnostic quizz "Redox reaction"

An oxidizing agent will always...

• be reduced

• increase in oxidation number

• increase in mass

• lose electrons

In a redox reaction, the species that loses electrons...

• is called the cathode

• is oxidized

• decreases in oxidation number

• gains mass at the electrode

The reaction 2 NaCl --> 2 Na + Cl2 is an example of:

• both an oxidation and reduction reaction

• neither an oxidation nor a reduction reaction

• a reduction reaction, only

• an oxidation reaction, only

Oxidation-reduction reactions occur because of the competition between particles for...

• protons

• neutrons

• electrons

• positrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Mg + PbCl2 --> MgCl2 + Pb. Which statement correctly describes the oxidation and reduction that occur?

• Mg is oxidized and Cl- is reduced

• Mg is oxidized and Pb+2 is reduced

• Mg is reduced and Cl- is oxidized

• Mg is reduced and Pb+2 is oxidized

In the reactions Sn+2 + 2 Fe+3 --> Sn+4 + 2 Fe+2, the reducing agent is...

• Fe+3

• Sn+4

• Sn+2

• Fe+2

As an element is oxidized, its oxidation number...

• increases as electrons are gained

• decreases as electrons are gained

• decreases as electrons are lost

• increases as electrons are lost

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of Chlorine in HClO4?

• +1

• +3

• +5

• +7

An Oxidation number can be

• zero

• negative

• positive

• All of Above

Oxidation state of any free element is always...

• 0

• 1

• 2

• 3