Q.1
Which substance is reduced in the following reaction? NaOH + Li --> LiOH + Na
  • Li
  • Na
  • O
  • H
Q.2
In the reaction Zn + H--> ZnO2 + H2 which element, if any, is oxidized?
  • Zn0
  • Zn+2
  • O-2
  • H20
  • None
Q.3
Oxidation-reduction reactions occur because of the competition between particles for...
  • protons
  • neutrons
  • electrons
  • positrons
Q.4
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
Q.5
Which change is an oxidation?
  • FeO to Fe2O3
  • Fe2O3 to FeO
  • H2O2 to H2O
  • H2O to H2
Q.6
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
Q.7
Which equation represents a redox reaction?
  • NaOH + HNO3 → NaNO3 +H2O
  • 2AgNO3 + Zn → Zn(NO3)2 + 2Ag
  • 2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3
  • CaCO3 + 2HCl → CaCl2 + H2O + CO2
0 h : 0 m : 1 s