A secondary cell is one which; this is possible because is disposable without ha

Question

A secondary cell is one which; this is possible because is disposable without harming the environment; no mercury is used is rechargeable; the cell reaction is completely reversible has double the lifetime of a primary cell; two primary cells are placed in parallel is driven by a primary cell; the cell reactions are coupled has double the voltage of a primary cell; two primary cells are placed in series b. An electrolytic reaction is a system in which a. the reaction conditions are manipulated to change the value of E cell to a favorable one. the same element is both oxidized and reduced. c- a chemical reaction is used to produce electricity. a reactant-favored reaction is forced to produce electricity by the input of heat or light. e. electricity is used to produce a chemical reaction. Which is not true of the standard conditions for electrochemical cell measurements? d. Solids are in the pure state Gases are at 1 bar pressure C. The cell voltage is always positive. Solutes are at 1.0 M concentration. Liquids are in the pure state.

Explanation / Answer

A)secondary cell is one which is rechargeable,this is possible because the cell reaction is completely reversible.

In secondary cells,the reactions can be reversed by an external electrical energy source.So they can use again and again by recharging.

Answer is (b)

B)in electrolytic cell electricity is used to produce chemical reaction.(non-spontaneous reaction)

So answer is (e)

The Eocell value in electrolytic cell doesn’t change,so answer is not (a)

C)electrochemical cell includes galvanic cell and electrolytic cell

In galvanic cell the cell voltage is always positive

In electrolytic cell the cell voltage need not to be positive

So answer is (c)

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