Electrochemistry RT

During electrolysis of KNO₃,H₂ is evolved

• Anode

• Cathode

• Both a and b   

• None

an oxidation process the oxidation number of the element

•  Increases

• Decreases

• Does not change

• None of these

Which element acts as a reducing agent in the reaction Zn+H₂SO₄↔ZnSO₄ + H₂

• Zn

• H

• S

• O

The reaction in galvanic cell is

• Spontaneous  

• Non-spontaneous

• Acid-base       

• None of these

Caustic soda is obtained by electrolysis of aqueous solution of NaCl in a cell called

• Daniell’s cell               

• Nelson’s cell

• Down’s cell

•  Voltaic cell

A process for converting one metal with thin layer of another metal is called

• Electrolysis

• Electroplating

• Electrode potential

• Standard electrode

Greater the value of standard reduction potential of species indicates

• Greater its tendency to accept electrons

• Lesser tendency to accept electrons

• Greater tendency to lose electrons

• None of these 

A cell in which the electrical current is passed through the redox reaction is called

• Dry cell        

• Electrolytic cell

• Voltaic cell

• Both A and C

Strongest reducing agent in the electrochemical series is

• Li

• F

•  H₂

•  I₂

The oxidation number of chromium in K₂Cr₂O₇ is

• 14

• 12

• 6

• None of these