electrochemical cells contd...

The electrodes used in the cells discussed so far, deteriorate with the passage of current and cannot offer a constant emf indefinitely. However, there was a few cells called standard cells, which can maintain a fairly constant emf over very long periods of time..

A cell is a source of electricity in which chemical energy is converted into electrical energy. There are two types of cells called the primary and secondary cells A cell in which chemical reaction is not reversible is called a primary cell. E.g., D..

Electrochemical Cells - The fact that chemical reactions produce electrical effects was discovered accidentally in 1791 by Luigi Galwani, professor of anatomy at the University of Bologna, Italy. He found that an electric current flowed across two dissimilar metals between which..

The fact that chemical reactions produce electrical effects was discovered accidentally in 1791 by Luigi Galwani, professor of anatomy at the University of Bologna, Ital..

An electrochemical cell is a device in which oxidation and reduction reactions take place indirectly and the decrease in the potential energy is converted into electrical energ..

Construction and Working of an Electrochemical Cell - A zinc rod is dipped in ZnSO 4 solution and a Cu rod in CuSO 4 solution. The Zn rod is externally connected to the copper rod through a rheostat, a galvanometer and a plug key. fig 5.10 The two aqueous solutions are interlink..

A zinc rod is dipped in ZnSO 4 solution and a Cu rod in CuSO 4 solution. The Zn rod is externally connected to the copper rod through a rheostat, a galvanometer and a plug ke..

1) Reactive metals are placed on top (e.g., Li) and they have a great tendency to get oxidized. Non-reactive metals like Ag and Au. 2) Any metal above hydrogen can displace it from dilute acids. Example: Any metal which is above another can displace that from its salt solutions Example: If two meta..

White Blood Corpuscles - The WBCs are larger in size than the RBCs but much lesser in number. They are different from the erythrocytes in the following aspects. a) They have no haemoglobin b) They are bigger in size c) They are nucleated and amoeboid d) They have a longer life span e) There are sev..

They are round biconvex cells that do not have a distinct nucleus. They are also called the thrombocytes. They number 250,000 to 400,000 per cubic mm of blood. Their life span is 8 to 14 days. They are involved in blood clottin..