121. When a spoon is to be electroplated with nickel the spoon is
122. Conversion of chemical energy into electrical energy occurs in
123. The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :
124. Galvanization of iron is carried out using
125. The working of a dry cell is based on
126. Galvanization is the :
127. Which one of the following metals is used to galvanise iron ?
128. A non-electronic conductor is
129. The anode of a dry cell is made up of
130. The coating of a thin layer of zinc on steel or iron objects is known as
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