Electrochemistry Test

Result

Electrochemistry Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Fundamental difference between an electrolytic cell and the galvanic cell is that in electrolytic cell

A
the free energy is supplied in the form of mechanical work done on the system by the outside world

B
in electrolytic cell the free enenrgy is supplied in the form of mechanical work done by the system on the outside world

C
the free energy decreases as work is done by the system on the outside world

D
he free energy is supplied in the form of electrical work done on the system by the outside world

Solution

In electrolytic cell electrical energy is converted into chemical energy. Here the electrical energy is used to drive redox reactions which have positive free energy and are non spontaneous
Question 2
1 / -0

Two half-cells have potentials – 0.44 V and 0.799 V, respectively. These two are coupled to make a galvanic cell. Which of the following statements is true?

A
Electrode of half-cell potential – 0.44 V acts as anode.

B
Electrode of half-cell potential – 0.44 V acts as cathode.

C
Electrode of half-cell potential 0.799 V acts as anode.

D
None of these
Question 3
1 / -0

Galvanic or a voltaic cell converts the chemical energy liberated during a redox reaction to

A
acoustic energy

B
electromagnetic energy

C
thermal energy

D
electrical energy

Solution

Galvanic cells convert chemical energy to electrical energy.
Question 4
1 / -0

Zinc/Silver oxide cell is used in electric watches.

Zn → Zn²⁺ + 2e^- ; E⁰ = - 0.76 V

Ag₂O + H₂O + 2e^- → 2Ag + 2OH^- E⁰ cell = 0.344 V

Find △G⁰ in joules.

A
- 1.30 x 10⁶ J

B
- 2.13 x 10⁵ J

C
2.13 x 10⁷ J

D
1.30 x 10⁶ J
Question 5
1 / -0

Electrochemistry deals with the production of electricity from

A
energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations

B
nuclear energy and the use of heat energy to bring about non-spontaneous chemical transformations

C
energy released during spontaneous chemical reactions and the use of heat energy to bring about non-spontaneous chemical transformations

D
nuclear energy and the use of electrical energy to bring about non-spontaneous chemical transformations

Solution

Electrochemistry is branch of chemistry that deals with production of electricity from a redox chemical reaction or carrying out a non spontaneous reaction using electrical energy.
Question 6
1 / -0

The cell constant is defined as

A
l/a

B
a/l

C
l a

D
l²/a
Question 7
1 / -0

Which of the following statements is not true for a galvanic cell when written in an abbreviated form?

A
Left half electrode is the negative terminal.

B
Left half electrode is an anode.

C
Electrons are given out in the external circuit from the anode.

D
Electrons are given out in the external circuit from the cathode.
Question 8
1 / -0

Choose the correct statement from the following.

A
Conductivity of platinum metal increases on heating from 0^oC to 100^oC.

B
Aqueous NaCl is a better conductor at 50^oC than at 25^oC.

C
Conductivity of cane sugar solution increases with dilution.

D
Specific conductance of N/10 H₂SO₄ falls off with dilution.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Electrochemistry Test - 1

Result

Electrochemistry Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

the free energy is supplied in the form of mechanical work done on the system by the outside world

in electrolytic cell the free enenrgy is supplied in the form of mechanical work done by the system on the outside world

the free energy decreases as work is done by the system on the outside world

he free energy is supplied in the form of electrical work done on the system by the outside world

Solution

Question 2

Electrode of half-cell potential – 0.44 V acts as anode.

Electrode of half-cell potential – 0.44 V acts as cathode.

Electrode of half-cell potential 0.799 V acts as anode.

None of these

Question 3

acoustic energy

electromagnetic energy

thermal energy

electrical energy

Solution

Question 4

- 1.30 x 106 J

- 2.13 x 105 J

2.13 x 107 J

1.30 x 106 J

Question 5

energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations

nuclear energy and the use of heat energy to bring about non-spontaneous chemical transformations

energy released during spontaneous chemical reactions and the use of heat energy to bring about non-spontaneous chemical transformations

nuclear energy and the use of electrical energy to bring about non-spontaneous chemical transformations

Solution

Question 6

l/a

a/l

l a

l2/a

Question 7

Left half electrode is the negative terminal.

Left half electrode is an anode.

Electrons are given out in the external circuit from the anode.

Electrons are given out in the external circuit from the cathode.

Question 8

Conductivity of platinum metal increases on heating from 0oC to 100oC.

Aqueous NaCl is a better conductor at 50oC than at 25oC.

Conductivity of cane sugar solution increases with dilution.

Specific conductance of N/10 H2SO4 falls off with dilution.

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

- 1.30 x 10⁶ J

- 2.13 x 10⁵ J

2.13 x 10⁷ J

1.30 x 10⁶ J

l²/a

Conductivity of platinum metal increases on heating from 0^oC to 100^oC.

Aqueous NaCl is a better conductor at 50^oC than at 25^oC.

Specific conductance of N/10 H₂SO₄ falls off with dilution.