CHEM101-EE group

CHEM101-EE group

University

20 Qs

quiz-placeholder

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CHEM101-EE group

CHEM101-EE group

Assessment

Quiz

Chemistry

University

Practice Problem

Medium

Created by

Prem Paudel(chem)

Used 2+ times

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20 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The standard reduction potential for the half cell reaction are: Fe ++ = Fe ; E0 = -0.44V and Zn ++ + 2e- = Zn ; E0 = -0.76V , which one of the is the strong oxidizing agent?

Fe ++

Fe

Zn ++

Zn

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

The cell which can be restored to nearly new condition by reversing the current flow is called…………………………

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is indicated when a chemical cell’s voltage (E°) has dropped to zero?

the concentration of the reactants has increased

he concentration of the products has decreased

the cell reaction has reached equilibrium

the cell reaction has completely stopped

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The standard reduction potentials in volts for Pb2+ and Ag+ are –0.13 and +0.80, respectively. Calculate E° in volts for a cell in which the overall reaction is Pb + 2Ag+ → Pb2+ + 2Ag

1.73

0.67

0.93

1.47

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The salt bridge in the electrochemical cell serves to

increase the rate at which equilibrium is attained

increase the voltage of the cell

maintain electrical neutrality

increase the oxidation/reduction rate

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The standard reduction potentials of Cu2+ and Ag+ in V are +0.34 and +0.80, respectively. Determine the value of E in volts for the following cell at 25°C Cu | Cu2+ (1.00 M) || Ag+ (0.0010 M) | Ag

0.37 V

0.55 V

– 0.48 V

0.28 V

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The advantages of fuel cells include

they can be recharged by the addition of more material to be oxidized and/or reduced

they can be made to produce little or no harmful pollutants

they can be made to run very quietly

all of the above

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