Oxidation of Elements Lesson

Presentation

•

Chemistry

•

University

•

Hard

Joseph Anderson

FREE Resource

36 Slides • 24 Questions

Chapter 16 Oxidation_Reduction

Multiple Choice

For the reaction...
N_{2 (g)}+ 3 H₂ _(g) <−> 2 NH_{3 (g)}
If the pressure in the system is increased, which substance will increase in concentration?

N₂

H₂

N₂ and H₂

NH₃

Multiple Choice

What is the K_eq expression for this reaction?

2 NO_(g) + O_2(g) ⇌ 2 NO_2(g)

K_eq= [NO₂]² / [NO]²[O₂]

K_eq= [NO]²[O₂] / [NO₂]²

K_eq= [NO]²[O₂] [NO₂]²

K_eq= [NO₂]² / [NO]² + [O₂]

Multiple Choice

This symbol indicates that a reaction is ____________

reversible

irreversible

Multiple Choice

At elevated temperatures ammonium carbonate, NH₂COONH₄, is in equilibrium with NH₃ and CO₂ according to the equation;

NH₂COONH₄(s) ↔ 2 NH₃(g) + CO₂(g)

What is the equilibrium expression for this reaction?

K = 2 [NH₃][CO₂]

[NH₂COONH₄]

K = [NH₃]²[CO₂]

[NH₂COONH₄]

K = 2 [NH₃][CO₂]

K = [NH₃]²[CO₂]

Multiple Choice

At what time the reaction reached equilibrium?

t₁

t₂

t₃

t₄

Multiple Choice

For the reaction...
SO₂ + O₂ <−> SO₃If the equilibrium shifts to the right, the concentration of O₂ will ___________.

increase

decrease

remain the same

double

Multiple Choice

For the reaction...
SO₂ + O₂ <−> SO₃
If the concentration of SO₂is increased, the equilibrium of the reaction will shift ___________.

left

right

left and right

neither left nor right

Multiple Choice

2A + 3B <----> 2AB
The forward reaction forms the substance __________.

A + B

Multiple Choice

Which of the following represents reduction?

C → CO

N₂ → NH₃

Zn → Zn²⁺

H₂ → H₂O

Multiple Choice

Which of the following represents oxidation?

C → CH₄

Fe³⁺ → Fe²⁺

Cl₂ → 2Cl^-

Zn → ZnO

Multiple Choice

What is the oxidation number of nitrogen in N₂?

-3

-1

Multiple Choice

Reduction is the ___________ of electrons.

loss

gain

sharing

transfer

Multiple Choice

What is the oxidation number of chlorine in HClO?

-1

Multiple Choice

What is the oxidation number of chlorine in HClO?

-1

Multiple Choice

What is the reduction half-reaction for the following redox reaction?
Zn + HgO $\longrightarrow$ ZnO + Hg

Zn $\longrightarrow$ Zn2+ 2e–

Hg2+ + 2e– $\longrightarrow$ Hg

Zn + HgO

ZnO + Hg

Multiple Choice

Which of the following reactions is balanced by both mass and charge?

Fe⁺² + Al →Fe + Al⁺³

Cu + Fe⁺² → Cu⁺¹ + Fe⁺³

F₂ + Br^- --> F^- + Br₂

Fe⁺² + 2 Cu --> 2 Cu⁺ + Fe

Multiple Choice

What coefficient would Fe⁺² have in the following reaction?

___ Al + ___ Fe⁺² → ___ Al⁺³ + ___ Fe

Multiple Choice

Which of the following is NOT a redox reaction?

Displacement

Decomposition

Synthesis

Neutralisation

Combustion

Multiple Choice

In the reaction
2Ca(s) + O₂(g) --> 2CaO(s), calcium is __________

Reduced

Synthesized

Oxidized

None of the above

Multiple Choice

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⁺

Multiple Choice

Which statement is true:
Mg → Mg²⁺ + 2e^–

Mg gains 2 electrons

Mg_²⁺ loses 2 electrons

Mg loses 1 electron

Mg loses 2 electrons

Multiple Choice

In the reaction
2Ca(s) + O₂(g) --> 2CaO(s), calcium is __________

Reduced

Synthesized

Oxidized

None of the above

Multiple Choice

Oxygen always has an oxidation number of...

-1

-2

Multiple Choice

Oxygen always has an oxidation number of...

-1

-2

Chapter 16 Oxidation_Reduction

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