Galvanic cells Quiz 1

Question 1

Which of the following statements are correct about a galvanic cell? $$ \ $$ $$(1)$$ Both the electrons are placed in the solution in same container, $$ \ $$ $$(2)$$ Device which convert electrical energy into chemical energy, $$ \ $$ $$(3)$$ Redox reaction is spontaneous, $$ \ $$ $$(4)$$ Electrons move from anode to cathode in a circuit

Accepted Answer

Both $$(3)$$ and $$(4)$$

Answer

Both $$(1)$$ and $$(2)$$

Answer

Both $$(2)$$ and $$(3)$$

Answer

Only $$(2)$$

Question 2

Find the number of electrons modified during a redox reaction that occurs in a specific is $$2Al\left( s ight)+3S{{n}^{4+}}\left( aq ight)	o 2A{{l}^{3+}}\left( aq ight)+3S{{n}^{2+}}\left( aq ight)$$

Accepted Answer

$$6$$

Answer

$$2$$

Answer

$$3$$

Answer

$$4$$

Question 3

What will be value of Gibbs energy $$\left( \Delta G{}^\circ  ight)$$ and equilibrium constant, respectively for the reaction $$Ni\left( s ight)+2A{{g}^{+}}\left( aq ight)	o N{{i}^{2+}}\left( aq ight)+2Ag\left( s ight),E{}^\circ =1.05V$$.

Accepted Answer

$$3.32	imes {{10}^{35}}$$

Answer

$$35.55	imes {{10}^{34}}$$

Answer

$$33.2	imes {{10}^{35}}$$

Answer

$$4	imes {{10}^{32}}$$

Question 4

For the reaction $$C{{u}^{2+}}\left( aq ight)+2{{e}^{-}}	o Cu\left( s ight),E_{cell}^{o}=0.34V,$$ Find $$\left[ C{{u}^{2+}} ight]$$ when $${{E}_{cell}}=0$$.

Accepted Answer

$$2.98	imes {{10}^{-12}}$$

Answer

$$2.98	imes {{10}^{-10}}$$

Answer

$$3.4	imes {{10}^{-8}}$$

Answer

$$0.34	imes {{10}^{-12}}$$

Question 5

Which of the following statement claims regarding conductance is true?

Accepted Answer

When temperature increases, conductance decreases.

Answer

When temperature decreases, conductance increases.

Answer

Only depends on the solvent.

Answer

Bulky molecules have higher conductance.