Electro Chemical Cell
Electro- Chemical Cell
An electrochemical cell is a device which converts chemical energy into electrical energy. This electrical energy maintains the flow of charge or electrons in a circuit. We can reverse the order that is we provide electric current so that the chemical reactions takes place.So we can say that It is capable of converting chemical energy into electrical energy, or vice versa.
The cells capable of generating an electric current from the chemical reactions occurring in them are called Galvanic cell or Voltaic Cell The cells which cause chemical reactions to occur in them when an electric current is passed through them are called electrolytic cells.The most common example is a dry cell which converts chemical energy into electrical energy. In the case of a rechargable cell we connect it to the mains via a charger so we provide electrical energy to it and it is converted into chemical energy.
It usually consists of two electrodes of different materials and an electrolyte. The electrode at higher potential is called anode and the one at lower potential is cathode.
A common example of an electrochemical cell is a standard 1.5-volt cell which is used to power many electrical appliances such as TV remotes and clocks.
The charge on an electron is 1.6 x 10-19 C, which is negative.
Choose the correct statement(s) in case of a voltaic cell. (a) Cathode used is Zn and anode used is copper. (b) The electrolyte used is dilute sulphuric acid | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) The cells capable of generating an electric current from the chemical reactions occurring in them are called Galvanic cell. (b)The cells capable of generating an electric current from the chemical reactions occurring in them are called Voltaic Cell. (c) The cells which cause chemical reactions to occur in them when an electric current is passed through them are called electrolytic cells. | |||
| Right Option : C | |||
| View Explanation | |||
Identify the correct statement /s related to polarization in voltaic cell. (A) When current passes through the voltaic cell, zinc plate starts dissolving in the acid and produces hydrogen bubbles. (B) These hydrogen bubbles accumulate on the coper plate and develop resistance to the flow of current. | |||
| Right Option : C | |||
| View Explanation | |||
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