CHEMISTRY IMPORTANT QUESTIONS FOR CLASS 12th

CHEMISTRY IMPORTANT QUESTIONS FOR CLASS 12th

chapter – 3




Question no. : 1


Calculate the standard cell potential of a galvanic

 cell with the following reactions.

            2Cr (s)    3cd 2+ (aq)  2Cr 3+ (aq) + 3cd 

Question no. : 2


What is galvanization Explain


Question no. : 3


What is the difference between metallic conduction 

and electrolytic conduction ?

Question no. : 4


How to find the unit of molecular conductivity ,

 specific conductivity and equivalent conductivity.

Question no. : 5


Explain the effect of thinness on different conductivity.

Question no. : 6


What is a standard hydrogen electrode? Explain

Question no. : 7


How does an electrolytic cell work ?

Question no. : 8


The different conductivity of the solution of an 

electrolyte depends on which factors ?

Question no. : 9


What is specific conductivity and cell constant ?

 And what is the relationship between them ?

Question no. : 10


Oxidation and reduction in a reaction with a – with is Explain.

Question no. : 11


Conductivity of acetic acid Is. 

Calculate its molar conductivity. If for acetic acid 

Value of So what is its dissociation constant?

Question no. : 12


List the metals which have electrolytic extraction  ?

Question no. : 13


How would you know the standard electrode

 potential of the body Mg2 + Mg  ?

Question no. : 14


Can you put a solution of copper sulphate in a

 zinc container  ?

Question no. : 15


If a current of 0-5 amperes flows for 2 hours

 in a metal wire, how many electrons will flow 

in the wire  ?

Question no. : 16


List the metals that have electrolytic extraction  ?

Question no. : 17


Explain how an electrochemical cell is supposed 

to form due to corrosion of iron  ?

Question no. : 18


Define the solubility conductivity and molar 

conductivity of an electrolyte. Discuss their 

change with concentration  ?

Question no. : 19


Why does the conductivity of a solution

 decrease with dilution ? 

Question no. : 20


Write the definition of electrochemical cell  ?

Question no. : 21


What is an electrolytic cell called  ?

Question no. : 22


 What is electrode potential  ?

Question no. : 23


What is called strong electrolysis, write two examples ? 

Question no. : 24


Write two examples of what is called double electrolysis ? 

Question no. : 25


What is meant by standard electrode potential  ?

Question no. : 26


Write the law of ohm ? 

Question no. : 27


Explain what is galvanization ? 

Question no. : 28


What is a salt bridge Write its two functions  ? 

Question no. : 29


Show the relationship between standard electrical 

conductive force and common constant ? 

Question no. : 30


What do you understand by oxidation catabolism ? 

Question no. : 31


What is the specific conductivity and its unit  ?

Question no. : 32


What is the resistivity of a solution ? 

Question no. : 33


Explain the difference between electrochemical 

cell and electrolytic cell ? 

Question no. : 34


What is the conductivity of the balance ? 

Question no. : 35


What is called molecular conductivity ? 

Question no. : 36


What is a cell constant called what is the relationship

 between the specific conductivity vasel-constant ? 

Question no. : 37


What are the factors affecting the electrical conductivity

 of an electrolytic substance ? 

Question no. : 38


The different conductivity of the solution of an electrolyte 

depends on which factors ? 

Question no. : 39


What is an electrolytic cell and how does it work  ?

Question no. : 40


What is the electromotive force of an electrochemical cell ? 

Question no. : 41


What is a standard hydrogen electrode, how is it made ? 

Question no. : 42


Write Farode’s law of electrolysis ? 

Question no. : 43


What is corrosion, explain the electrochemical principle

 of corrosion ? 

Question no. : 44


Derive the nernst equation for single electrode potential  ?

Question no. : 1


Explain the working system of a cell in which chemical

 energy is converted into electrical energy.

Question no. : 2


Explain how a voltage cell differs from an electrolytic cell.

Question no. : 3


Write Faraday’s rules of electrical updating.


Question no. : 4


Iron doors and windows rust. How rust occurs.

Question no. : 5


What type of cells are used in watches and batteries?

Question no. : 6


(a)        such electrolytes that are fully ainikrta is what is called explain  ?   

(b) Find the molar conductivity at the infinite dilution of 

aqueous solution of BaCl 2 .  The molecular conductivity of Ba 2+

 and Cl  ions is 127.30 s cm 2 mol -1 and 76.34 s cm 2 mol -1 respectively .

Question no. : 7


 


Question no. : 8


 


Question no. : 9


It is not possible to find the value of the molecular conductivity

 of a weakly electrolytic at infinity with a graph why?

Question no. : 10


How is the anode negative electrode in a galvanic cell?


Question no. : 11


Most people drink by keeping water in a copper pot 

why?

Question no. : 12


Lead accumulator cell to be used to bring the  2 SO 4 

 the density is low, then at any time – time to put it to distilled water why?

Question no. : 13


Once the process of corrosion of iron starts it happens very 

fast. Explain the cause and mechanism?

Question no. : 14


Briefly describe the method used to apply a layer of silve

r on an iron spoon  ?

Question no. : 15


Describe a process in which chemical energy is converted

 into electrical energy   ?

Question no. : 16


Explain the name and mechanism of such a device which has a 

device to convert fuel energy into electrical energy without using heat engine  ?

Question no. : 17


Cells in which they get recharged when electric current flows 

what are they called and how do they work  ?

Question no. : 18


Explain the reason –

  1. The density of an electrolyte in a lead accumulator cell decreases 
  2. and the cell becomes discharged why?
  3. Why is it not possible to measure a single electrode potential? 

Leave a Comment