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Electrochemistry Multiple Choice Questions Class 9

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1. The process in which substance gains electrons is called




2. On an industrial scale sodium metal is prepared by electrolysis of fused




3. Corrosion can be prevented by




4. The electrolyte used for tin plating is




5. An electrolytic cell uses electrical energy to drive




6. Loss of hydrogen atoms by an element is called




7. The elements whose oxidation number is increased are




8. The oxidation state of group IIIA metals is




9. In a dry cell the anode is made up of




10. An electrochemical cell is also called




11. As compare to iron aluminum has




12. Oxidation-reduction reaction involves




13. Lead and Zinc metals occur naturally as




14. Conditions for good electroplating are




15. Electrochemical cells convert which of these into electrical energy?




16. The electrolyte among the following is




17. The process used to deposit one metal over another metal is called




18. A physical or chemical process that occurs by itself is called




19. Voltaic cells generate electricity by




20. The oxidation state of any free element is always




21. Galvanic cells are also named as




22. When zinc is plated on steel the anode is made up of




23. Electrolysis of brine produces




24. A reactant containing the element that is oxidized is called




25. By losing one or two electrons the atoms of metal are




26. In chromium plating few drops of Sulphuric acid are added to the electrolyte to prevent




27. The electrodes used in the production of sodium metal are




28. In thermal power stations carbon atoms undergo oxidation to form




29. Electrolytes convert electricity in




30. A concentrated aqueous solution of sodium chloride is called




31. Rusting of iron occurs due to




32. The element reduced in following reaction 2Ca + O2 2CaO is