What is the main principle involved in a Voltaic cell?
- AConversion of chemical energy into heat energy.
- BConversion of heat energy into electrical energy.
- CConversion of chemical energy into electrical energy.
- DConversion of electrical energy into chemical energy.
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Which process occurs at the anode during the process of electrolysis?
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View SolutionCan oxidation or reduction take place alone? Why or why not? What are such reactions called?
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View SolutionWhich process occurs at the cathode during the process of electrolysis?
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View SolutionWhich of the following statements about the given reaction are correct?
$3 Fe (s) + 4 H_2 O (g) \longrightarrow Fe_3 O_4 (s) + 4 H_2 (g)$
$(i)$ Iron metal is getting oxidised
$(ii)$ Water is getting reduced
$(iii)$ Water is acting as reducing agent
$(iv)$ Water is acting as oxidising agent
$3 Fe (s) + 4 H_2 O (g) \longrightarrow Fe_3 O_4 (s) + 4 H_2 (g)$
$(i)$ Iron metal is getting oxidised
$(ii)$ Water is getting reduced
$(iii)$ Water is acting as reducing agent
$(iv)$ Water is acting as oxidising agent
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View Solution$A$ shiny brown coloured element $X$ on heating in air becomes black in colour. Name the element $X$ and the black coloured compound formed.
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