Assertion and Reason Type question chapter 3 electro chemistry class 12

CLASS IX, X , XI , XII , NEET and JEE Assertion and Reason Type question chapter :-3 electro chemistry class 12

1. . Assertion : Cu is less reactive than hydrogen.
 Reason : Cu2+/Cu EΘ is negative.

(i) Both assertion and reason are true and the reason is the correct explanation of assertion
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion
(iii) Assertion is true but the reason is false
(iv) Both assertion and reason are false
((v) Assertion is false but reason is true.

... Answer is iii)
(iii) Assertion is true but the reason is false"

2. Assertion : ECell should have a positive value for the cell to function. 

Reason : Ecathode more positive or less negative compare to Eanode

(i) Both assertion and reason are true and the reason is the correct explanation of assertion
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion.
(iii) Assertion is true but the reason is false.
(iv) Both assertion and reason are false
(v) Assertion is false but reason is true

... Answer is i)
(i) Both assertion and reason are true and the reason is the correct explanation of assertion".

 3. Assertion : Conductivity of all electrolytes decreases on dilution. 
Reason : On dilution number of ions per unit volume decreases. :

(i) Both assertion and reason are true and the reason is the correct explanation of assertion.
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion
(iii) Assertion is true but the reason is false.
(iv) Both assertion and reason are false.
(v) Assertion is false but reason is true

... Answer is i)
. (i) Both assertion and reason are true and the reason is the correct explanation of assertion.".

4. Assertion : Λm for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Reason : For weak electrolytes degree of dissociation increases with dilution of solution. :

(i) Both assertion and reason are true and the reason is the correct explanation of assertion
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion.
(iii) Assertion is true but the reason is false
(iv) Both assertion and reason are false
(v) Assertion is false but reason is true.

... Answer is i)
(i) Both assertion and reason are true and the reason is the correct explanation of assertion ".

5. Assertion : Mercury cell does not give steady potential.
 Reason : In the cell reaction, ions are not involved in solution.

(i) Both assertion and reason are true and the reason is the correct explanation of assertion.
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion
(iii) Assertion is true but the reason is false
(iv) Both assertion and reason are false.
(v) Assertion is false but reason is true.

... Answer is v)
(v) Assertion is false but reason is true".

6. Assertion : Electrolysis of NaCl solution gives chlorine at anode instead of O2.
 Reason : Formation of oxygen at anode requires overvoltage.

(i) Both assertion and reason are true and the reason is the correct explanation of assertion
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion
(iii) Assertion is true but the reason is false.
(iv) Both assertion and reason are false.
(v) Assertion is false but reason is true.

... Answer is i)
(i) Both assertion and reason are true and the reason is the correct explanation of assertion ".

7. Assertion : For measuring resistance of an ionic solution an AC source is used.
 Reason : Concentration of ionic solution will change if DC source is used.

(i) Both assertion and reason are true and the reason is the correct explanation of assertion
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion
(iii) Assertion is true but the reason is false
(iv) Both assertion and reason are false
(v) Assertion is false but reason is true.

... Answer is i)
(i) Both assertion and reason are true and the reason is the correct explanation of assertion".

8. Assertion : Current stops flowing when ECell = 0. 
Reason : Equilibrium of the cell reaction is attained

(i) Both assertion and reason are true and the reason is the correct explanation of assertion.
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion
(iii) Assertion is true but the reason is false
((iv) Both assertion and reason are false
(v) Assertion is false but reason is true.

... Answer is i)
(i) Both assertion and reason are true and the reason is the correct explanation of assertion.".

9. Assertion : EAg+/Ag increases with increase in concentration of Ag+ ions.
 Reason : EAg+/Ag has a positive value ?

(i) Both assertion and reason are true and the reason is the correct explanation of assertion
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion.
(iii) Assertion is true but the reason is false
(iv) Both assertion and reason are false.
(v) Assertion is false but reason is true.

... Answer is ii)
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion.".

10. Assertion : Copper sulphate can be stored in zinc vessel.
 Reason : Zinc is less reactive than copper

(i) Both assertion and reason are true and the reason is the correct explanation of assertion
(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion.
(iii) Assertion is true but the reason is false.
(iv) Both assertion and reason are false.
(v) Assertion is false but reason is true..

... Answer is iv)
(iv) Both assertion and reason are false".