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In an electrochemical cell, the negative terminal of the battery is connected to-

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Important Questions on Electrolysis and Chemical Reaction

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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis

Consider the metals and solutions given in the box.

Zn, Mg, Cu, Ag, CuSO4 Solution, MgSO4 Solution

(a) Which of the above metals have to be selected to construct a Galvanic Cell? 
(b)Identify the anode and cathode of the cell. 

[Reactivity order Mg > Zn > Cu > Ag]

(c) Write the redox reaction taking place in the cell. 

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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis

An aqueous solution of nickel (II) sulphate was electrolyzed using nickel electrodes. Observe the diagram and answer the question that follows:

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  • Which equation for the reaction at the anode is correct?
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
During electrolysis, which electrode is called as cathode?
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
During electrolysis, the reaction at the anode is:
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
An electrolytic cell consists of
(i) positively charged cathode
(ii) negatively charged anode
(iii) positively charged anode
(iv) negatively charged cathode
MEDIUM
Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
What is meant by electrochemistry?
MEDIUM
Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
The detection of alcohol in drunken drivers is possible through the electrochemical _____ reaction of ethanol. 
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
Biochemistry is a branch of chemistry that deals with the relation between electrical energy and chemical change.
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
During extraction of metals from their ores using the chemical effects of electric current, metal is always produced at the _____. (anode/ cathode)
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
Which statement is true for an electrochemical cell?
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
What are the significance of electrochemistry?
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
In the galvanic cell, which process occurs at the positive terminal, and what is it called?
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
An electrolytic cell consists of
(a) Positively charged cathode
(b) Negatively charged anode
(c) Positively charged anode
(d) Negatively charged cathode
MEDIUM
Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
Define: Electrochemistry
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
An electrolytic cell consists of
(i) positively charged cathode
(ii) negatively charged anode
(iii) positively charged anode
(iv) negatively charged cathode
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
Production of metals like aluminium and titanium from their ores involves electrochemical reactions.
MEDIUM
Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
Match the following columns:
  Column I   Column II
(i) Electrode connected to positive terminal of battery. (a) Cathode
(ii) Electrode connected to negative terminal of battery. (b) Anode
(iii) Substance which undergoes decomposition in aqueous solution, when current is passed (c) Non–electrolyte
(iv) Substance which does not allow electric current to pass through it neither in aqueous not in molten state. (d) Electrolyte
MEDIUM
Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
List out the instruments that use electrochemical cells. What are the merits and demerits of using such cells? 
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
Batteries that are used in the mobile phone can be recharged. Likewise, can you recharge the batteries used in watches? Justify your answer.
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Physical Science>Chemistry>Electrolysis and Chemical Reaction>Important Terms Used in Electrolysis
Cell Instrument in which it is used
Dry cell Radios
Cameras
Clocks
Toys
Mercury cell Watches
Calculator
Electronic instruments
Nickel- cadmium cell Rechargeable torches 
Cameras
Lithium ion cell Mobile phone
Laptops
  • What do we do with these types of cells after their use?
  • Which among these cells can be recharged and reused? 
  • Do they cause environmental pollution?