In which reaction is hydrogen acting as an oxidising agent?

(CH 3 ) 2 CO + H 2 --> (CH 3 ) 2 CHOH

In which reaction is the metal oxidised?

[Fe(H 2 O) 6 ] 3+ + Cl – --> [Fe(H 2 O) 5 (Cl)] 2+ + H 2 O

[CoCl 4 ] 2– + 6H 2 O --> [Co(H 2 O) 6 ] 2+ + 4Cl –

Which one of the following is not a redox reaction?

2CrO 4 2- + 2H + → Cr 2 O 7 2- + H 2 O

Br 2 + SO 2 + 2H 2 O → SO 4 2- + 4H + + 2Br −

SnCl 2 + HgCl 2 → Hg + SnCl 4

Cu 2 O + H 2 SO 4 → CuSO 4 + Cu + H 2 O

Refer to the following reaction Which one of the following statements is correct?

The reaction is not feasible below 298 K

At equilibrium, the yield of hydrogen iodide is changed by increasing the pressure.

At equilibrium, the yield of hydrogen iodide increases as the temperature is increased.

Photochromic glass contains silver ions and copper ions. A simplified version of a redox equilibrium is shown below. In bright sunlight the high energy u.v. light causes silver atoms to form and the glass darkens. When the intensity of the light is reduced the reaction is reversed and the glass lightens. Cu + (s) + Ag + (s) ⇌ Cu 2+ (s) + Ag(s) clear glass dark glass When the photochromic glass darkens

the Cu + ion is acting as a reducing agent.

the Ag+ ion is acting as an electron donor.

Which one of the following statements is not correct?

The first ionisation energy of iron is greater than its second ionisation energy.

The magnitude of the lattice enthalpy of magnesium oxide is greater than that of barium oxide.

The oxidation state of iron in [Fe(CN) 6 ] 3− is greater than the oxidation state of copper in [CuCl 2 ] −

The boiling point of C 3 H 8 is lower than that of CH 3 CH 2 OH

In which one of the following reactions does hydrogen not act as a reducing agent?

2H 2 + CH 3 COCH 3 → CH 3 CH 2 CH 3 + H 2 O

Which one of the following is a redox reaction?

3Cl 2 + 6OH − → 5Cl − + ClO 3 - + 3H 2 O

2CrO 4 3- + 2H + → Cr 2 O 7 2- + H 2 O

HNO 3 + 2H 2 SO 4 → NO 2 + + H 3 O + + 2HSO 4 -

CaCO 3 + SiO 2 → CaSiO 3 + CO 2

Which one of the following is not a redox reaction?

TiO 2 + 2Cl 2 + C → TiCl 4 + CO 2

MnO 2 + 4HCl → MnCl 2 + 2H 2 O + Cl 2

3MnO 4 2- + 4H+ → 2MnO 4 - + MnO2 + 2H2O

In which one of the following reactions is H 2 O 2 behaving as a reducing agent?

5H 2 O 2 + − 2MnO 4 - + 6H+ → 2Mn 2+ + 8H 2 O + 5O 2

H 2 O 2 + 2I − + 2H + → I 2 + 2H 2 O

H 2 O 2 + 2[Co(NH 3 ) 6 ] 2+ → 2[Co(NH 3 ) 6 ] 3+ + 2OH −

3H 2 O 2 + 2[Cr(OH) 6 ] 3− → 2CrO 4 2- + 8H 2 O + 2OH −

Which equation does not involve the reduction of a transition metal compound?

TiO 2 + 2C + 2Cl 2 → TiCl 4 + 2CO

Cr 2 O 3 + 2Al → 2Cr + Al 2 O 3

The compound lithium tetrahydridoaluminate(III), LiAlH 4 , is a useful reducing agent. It behaves in a similar fashion to NaBH 4 . Carbonyl compounds and carboxylic acids are reduced to alcohols. However, LiAlH 4 also reduces water in a violent reaction so that it must be used in an organic solvent. Which one of the following concerning the violent reaction between LiAlH 4 and water is false ?

The activation energy for the reaction is relatively high.

The reaction has a negative free-energy change.

Aqueous lithium ions are formed.

In which one of the following reactions does the metal species undergo reduction?

MnO 2 + 4HCl → MnCl 2 + 2H 2 O + Cl 2

[Cu(H 2 O) 6 ] 2+ + 4Cl − → [CuCl 4 ] 2− + 6H 2 O

CrO 7 2- + 2OH − → 2CrO 4 2- + H 2 O

TiO 2 + 2C + 2Cl 2 → TiCl 4 + 2CO

3.1.7 Oxidation/reduction/redox equations

Authored by Stanton Wertjes

Chemistry

9th - 12th Grade

NGSS covered

Used 80+ times

3.1.7 Oxidation/reduction/redox equations

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these is not a redox reaction?

Cu₂O + H₂SO₄ ⟶ CuSO₄ + Cu + H₂O

MgO + 2HCl ⟶ MgCl₂ + H₂O

SnCl₂ + HgCl₂ ⟶ Hg + SnCl₄

MnO₂ + 4HCl ⟶ MnCl₂ + 2H₂O + Cl₂

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which species is not produced by a redox reaction between solid sodium iodide and concentrated sulfuric acid?

Na₂SO₄

H₂S

SO₂

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

V₂O₅ can be used as a catalyst in the Contact Process.

Which is a step in the Contact Process in which the vanadium is oxidised?

SO₂ + V₂O₅ ⟶ SO₃ + 2VO₂

SO₃ + 2VO₂ ⟶ SO₂ + V₂O₅

2VO₂ + 0.5O₂ ⟶ V₂O₅

V₂O₅ ⟶ 2VO₂ + 0.5O₂

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these shows nitrogen in its correct oxidation states in the compounds given?

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these is a redox reaction?

CaO + SiO₂ ⟶ CaSiO₃

H₂SO₄ + Na₂O ⟶ Na₂SO₄ + H₂O

NaBr + H₂SO₄ ⟶ NaHSO₄ + HBr

Mg + S ⟶ MgS

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these species is the best reducing agent?

Cl₂

Cl⁻

I₂

I⁻

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following shows chlorine in its correct oxidation states in the compounds shown?

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

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3.1.7 Oxidation/reduction/redox equations

Which of these is not a redox reaction?

Which species is not produced by a redox reaction between solid sodium iodide and concentrated sulfuric acid?

V2O5 can be used as a catalyst in the Contact Process.Which is a step in the Contact Process in which the vanadium is oxidised?

Which of these shows nitrogen in its correct oxidation states in the compounds given?

Which of these is a redox reaction?

Which of these species is the best reducing agent?

Which of the following shows chlorine in its correct oxidation states in the compounds shown?

Which substance is not produced in a redox reaction when solid sodium iodide reacts with concentrated sulfuric acid?

In which reaction is hydrogen acting as an oxidising agent?

In which reaction is the metal oxidised?

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V₂O₅ can be used as a catalyst in the Contact Process.

Which is a step in the Contact Process in which the vanadium is oxidised?