Q.1 Tick mark (v) the correct answer :
1. The standard cell should show the characteristics of
(a) reversibility of the cell,
(b) temperature independent emf,
(©) high temperature coefficient of emf, (d) oxidation reactions in both the half cells.
Answers
Answer:
c) high temperature ️ cofficient of emf
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Answer:
The correct option to the question-" The standard cell should show the characteristics of " is-
(c) high temperature coefficient of emf.
Explanation:
To have more information about the above topic,we should know about-
Standard cell
A standard cell is defined as a voltaic cell which produce a constant and accurate electromotive force . A standard cell produces direct current in an electrical circuit.
Characteristics of standard cell-
The standard cell shows the characteristics are-
- A standard cell produces direct current in an electrical circuit.
- These cells are use chemical reaction in order to produce an electrical energy.
(©) high temperature coefficient of emf-
The above option is correct as- the temperature coefficient of the emf of the cell is derived from Gibbs Helmholtz law.
With increase in temperature ,the emf value decreases. Temperature also affects the internal resistanceH as high temperature lowers the resistance and low temperatures increase the resistance.