L67 redox reaction

Combustion and single-replacement reactions are __________ redox reactions.

• always

• never

• sometimes

• mostly

Tags

NGSS.HS-PS1-2

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-
• Pb⁴⁺ + 2e^- →Pb²⁺
• 2O^-2 →O₂ + 4e^-
• Fe + 3e^- →Fe³⁺

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What type of reaction is the following? 
Zn_(s) + 2Cu(NO₃)_2(aq) ---> 2Cu_(s) + Zn(NO₃)_2(aq)

• double displacement
• single displacement
• precipitation
• neutralization

2Pb(NO₃)₂   -->   2PbO +  4NO₂  +  O₂

• Synthesis
• Decomposition
• Single Displacement
• Combustion

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

Which of the following equations represents an oxidation-reduction reaction?

• H₂ --> 2H
• H₂ + Cl₂ --> 2HCl
• HCl + NaBr--->  HBr + NaCl
• H₂O + SO₂ --> H₂SO₃

Which of the following equations does not represent an oxidation-reduction reaction?

• N₂ + O₂ --->2NO
• H₂ + Cl₂ --> 2HCl
• 2NaBr + Cl₂ --->2NaCl + Br₂
•  Fe --->Fe³⁺ + 3e–

Which of these is a redox reaction?

• CaO + SiO₂ ⟶ CaSiO₃

• H₂SO₄ + Na₂O ⟶ Na₂SO₄ + H₂O

• NaBr + H₂SO₄ ⟶ NaHSO₄ + HBr

• Mg + S ⟶ MgS

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which one of the following is not a redox reaction?

• Br₂ + SO₂ + 2H₂O → SO₄^2- + 4H⁺ + 2Br⁻

• SnCl₂ + HgCl₂ → Hg + SnCl₄

• Cu₂O + H₂SO₄ → CuSO₄ + Cu + H₂O

• 2CrO₄^2- + 2H⁺ → Cr₂O₇^2- + H₂O