Q121
Open questionWhen a spoon is to be electroplated with nickel the spoon is
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Q122
Open questionConversion of chemical energy into electrical energy occurs in
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Q123
Open questionThe process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :
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Q124
Open questionGalvanization of iron is carried out using
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Q125
Open questionThe working of a dry cell is based on
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Q126
Open questionGalvanization is the :
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Q127
Open questionWhich one of the following metals is used to galvanise iron ?
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Q128
Open questionA non-electronic conductor is
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Q129
Open questionThe anode of a dry cell is made up of
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Q130
Open questionThe coating of a thin layer of zinc on steel or iron objects is known as
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Q131
Open questionA potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?
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Q132
Open questionAn electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :
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Q133
Open questionThe metals commonly used for electroplating are
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Q134
Open questionIn galvanization, iron is coated with
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Q135
Open questionThe process of improving the quality of rubber by heating it with sulphur is called
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Q136
Open questionRusting of iron takes place due to
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Q137
Open questionCombustion of a candle is a/an
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Q138
Open questionWhich of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?
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Q139
Open questionCandle is a mixture of
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Q140
Open questionCoal is formed from
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