Electro Metallurgy and Corrosion Mid - I, September - 2014

1.Specific conductance will _______________ with dilution.
  • Increases
  • decreases
  • First increases then decreases
  • First deceases then increases
Answer: B
2._____________ process provides protection against corrosion.
  • Electro winning
  • Electroplating
  • Electro refining
  • Electroforming
Answer: B
3.Galvanizing is aimed to _______________
  • Improve the corrosion resistance
  • to coat the surface
  • To decorate the surface
  • to act as a primary coating for another coating
Answer: A
4.If 2 Faradays of charge passed through CuSO4 solution then the amount of Cu deposited at Cathode is _____
  • Its equivalent weight
  • its atomic weight
  • Its molecular weight
  • its electrochemical equivalent weight
Answer: B
5.Standard EMF of the Cell Fe/Fe++ is +0.44 and that of Cu/Cu2+ is -0.32 then _____
  • Cu reduces Fe 2+ ions
  • Cu2+ oxides Fe
  • Fe reduces Cu2+
  • Cu2+ reduces Fe
Answer: B
6.Electro chemistry principles are also used in calculation of ___________ properties.
  • Thermo dynamic
  • Electrical
  • Chemical
  • Mechanical
Answer: A
7.The electro-chemical effects are due to conversion of ________ into electrical energy.
  • Mechanical energy
  • Chemical energy
  • Electrical energy
  • Heat energy
Answer: B
8.The discovery of electro kinetic phenomena is due to
  • F
  • Eo
  • EMF
  • Power
Answer: D
9._____________ phenomena reflect the relation between the relative motion of two phases and the electrical properties of the interface between them.
  • Electro kinetic
  • Electro refining
  • Electro winning
  • Electro forming
Answer: A
10.The phenomena of over voltage is attributed to slow attainment of equilibrium at _____.
  • Anode
  • Electrolyte
  • Cathode
  • Electrodes
Answer: D
11.According to Faradays laws, when same amount of charge is passed through different electrolyte solutions the metal deposited is proportional to ___________________________
Answer: Electrochemical equivalent
12.Principle of electrochemical cell is to convert _____________ energy to electrical energy.
Answer: Chemical
13. Over voltage is defined as ____________ voltage applied to overcome polarization.
Answer: Excess
14.Role of salt bridge in an electrochemical cell is to maintain _________
Answer: Electrical neutrality
15.Expression for total standard cell potential____________________
Answer: E0 cell = E0 cathode – E0 Anode
16.Electron positivity means tendency to ______________.
Answer: Loose Electrons
17.______________ series is a classification of metals in order of their electro positivity.
Answer: Electro chemical
18.Electrophoresis is a ______________Phenomena.
Answer: Electro kinetics
19.The phenomena of over voltage is attributed to slow attainment of equilibrium at ______________ and cathode.
Answer: Anode
20.____________ is a electro kinetic phenomena.
Answer: Electrophoresis