Select the correct statements:A. Presence of `CO_(2)` increase rate of rustingB. Silver plating is done with the help of `K[Ag(CN)_(2)]`C. In saline water, rate of rusting is retardedD. Pure metals undergo corrosion faster than impure metlas.

Select the correct statements:A. Presence of `CO_(2)` increase rate of

1.	Select the correct statements:A. Presence of `CO_(2)` increase rate of rustingB. Silver plating is done with the help of `K[Ag(CN)_(2)]`C. In saline water, rate of rusting is retardedD. Pure metals undergo corrosion faster than impure metlas.
Answer» Correct Answer - A::B::D Greater `H^(+)` ions more rusting will take place `Fe rarr Fe^(2+) + 2e` `O_(2) + 4H^(+) rarr 2H_(2)O` `K[Ag(CN)_(2)]` is soluble in water and electrolyte used is silver plating. Pure metal are more reactive.

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Define molar conductivity of a solution and explain how molar conductivity changes with change in concentration of a solution for a weak and a strong electrolyte.
Limiting molar conductivity of `NH_(4)OH` [i.e., `Lambda_(m)^(@)(NH_(4)OH)`] is equal to:A. `Lambda_(m (NH_(4)Cl ))^(@) + Lambda_(m (NaCl))^(@) - Lambda_(m(NaOH))^(@)`B. `Lambda_(m (NaOH))^(@) + Lambda_(m(NaCl))^(@) - Lambda_(m(NH_(4)Cl))^(@)`C. `Lambda_(m(NH_(4)OH))^(@) + Lambda_(m (NH_(4)Cl))^(@) - Lambda_(m(HCl))^(@)`D. `Lambda_(m (NH_(4)Cl))^(@) + Lambda_(m (NaOH))^(@) - Lambda_(m(NaCl))^(@)`
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Based on the data given below, the correcy order of reducing power is: `Fe_((aq.))^(3+) + e rarr Fe_((aq.))^(2+), E^(@) = +0.77 V` `Al_((aq.))^(3+) + 3e rarr Al_((s)), E^(@) = -1.66 V` `Br_(2(aq.)) + 2e rarr 2Br_((aq.))^(-), E^(@) = +1.08 V`A. `Br^(-) lt Fe^(2+) lt Al`B. `Fe^(2+) lt Al lt Br^(-)`C. `Al lt Br^(-) lt Fe^(2+)`D. `Al lt Fe^(2+) lt Br^(-)`
Based on the data given below, the correcy order of reducing power is: `Fe_((aq.))^(3+) + e rarr Fe_((aq.))^(2+), E^(@) = +0.77 V` `Al_((aq.))^(3+) + 3e rarr Al_((s)), E^(@) = -1.66 V` `Br_(2(aq.)) + 2e rarr 2Br_((aq.))^(-), E^(@) = +1.08 V`A. `Br^(-) lt Fe^(2+) lt Al`B. `Fe^(2+) lt Al lt Br^-`C. `Al lt Br^(-) lt Fe^(2+)`D. `Al lt Fe^(2+) lt Br^(-)`
What are elementary reactions ?

Select the correct statements:A. Presence of `CO_(2)` increase rate of rustingB. Silver plating is done with the help of `K[Ag(CN)_(2)]`C. In saline water, rate of rusting is retardedD. Pure metals undergo corrosion faster than impure metlas.

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