Several blocks of magnesium are fixed to the bottom of a ship to
prevent action of water and salt
keep away the sharks
prevent puncturing by under–sea rocks
make the ship lighter
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When a lead storage battery is discharged |
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At 25°C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm–1cm2 mol–1 and at infinite dilution its molar conductance is 238 ohm–1cm2 mol–1. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is |
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Standard electrode potentials are: Fe2+ | Fe (E° = –0.44 V), Fe3+ | Fe2+ (E° =0.77 V) Fe2+, Fe3+ and Fe blocks are kept together, then |
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The best way to prevent rusting of iron is |
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The laws of electrolysis were proposed by |
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The electrochemical equivalent of a metal is ‘$x$’ gram–coulomb–1. The equivalent weight of metal is |
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20 ml solution of 0.1 M ferrous sulphate was completely oxidised using a suitable oxidising agent. What is the number of electrons exchanged? |
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The process of zinc–plating on iron sheet is known as |
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The logarithm of the equilibrium constant of the cell reaction corresponding to the cell X(s) | X2+(aq) || Y+(aq) | Y(s) with standard cell potential, Eo |
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The pH of aqueous KCl solution is 7.0. This solution was electrolyzed for a few seconds using Pt electrodes. Which of the following is correct? |
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