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Assertion & Reason Test: Electrochemistry - NEET MCQ


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12 Questions MCQ Test Chemistry Class 12 - Assertion & Reason Test: Electrochemistry

Assertion & Reason Test: Electrochemistry for NEET 2024 is part of Chemistry Class 12 preparation. The Assertion & Reason Test: Electrochemistry questions and answers have been prepared according to the NEET exam syllabus.The Assertion & Reason Test: Electrochemistry MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: Electrochemistry below.
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Assertion & Reason Test: Electrochemistry - Question 1

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Conductivity of an electrolyte increases with decrease in concentration.

Reason (R): Number of ions per unit volume decreases on dilution.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 1
Conductivity of an electrolyte decreases with decrease in concentration because of ions per unit volume decreases on dilution.
Assertion & Reason Test: Electrochemistry - Question 2

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Λm for weak electrolytes shows a sharp increase when the electrolytic solution is diluted.

Reason (R): For weak electrolytes degree of dissociation increases with dilution of solution.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 2
Weak electrolytes dissociate partially in concentrated solution. On dilution, their degree of dissociation increases hence, their Λm increases sharply.
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Assertion & Reason Test: Electrochemistry - Question 3

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Electrolytic conduction increases with increase in temperature.

Reason (R): Increase in temperature cause the electronic movement more rapid

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 3
As the temperature of electrolytic solution is increased, the kinetic energy of the ion increases. This results in the increase of electrical conductance of electrolytic solutions.
Assertion & Reason Test: Electrochemistry - Question 4

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Molar Conductivity of an ionic solution depends on temperature.

Reason (R): Molar Conductivity of an ionic solution depends on the concentration of electrolytes in the solution.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 4
Molar Conductivity of an ionic solution depends on the temperature as well as on the concentration of the electrolytes in the solution.
Assertion & Reason Test: Electrochemistry - Question 5

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Ecell should have a positive value for the cell to function.

Reason (R): Ecathode < Eanode.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 5
Ecell = Ecathode – Eanode.

To have a positive value of Ecell, Ecathode should be greater than Eanode.

Assertion & Reason Test: Electrochemistry - Question 6

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Cu is less reactive than hydrogen.

Reason (R): Eo Cu2+ / Cu is negative.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 6
Cu is less reactive than hydrogen because EΘCu2+/Cu is positive.
Assertion & Reason Test: Electrochemistry - Question 7

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Copper sulphate can be stored in a zinc vessel.

Reason (R): Zinc is more reactive than copper.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 7
Zinc will get dissolved in CuSO4 solution, since zinc is more reactive than copper.
Assertion & Reason Test: Electrochemistry - Question 8

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): EAg+/Ag increases with increase in concentration of Ag+ ions.

Reason (R): EAg+/Ag has a positive value.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 8

On increasing [Ag+], EAg+/ Ag will increase and it has a positive value.

Assertion & Reason Test: Electrochemistry - Question 9

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Electrolysis of NaCl solution gives chlorine at anode instead of O2.

Reason (R): Formation of oxygen at anode requires over voltage.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 9
Formation of oxygen has lower value of E° than formation of chlorine even then it is not formed because it requires over voltage.
Assertion & Reason Test: Electrochemistry - Question 10

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion: The resistivity for a substance is its resistance when it is one meter long and its area of cross section is one square meter.

Reason: The SI units of resistivity is ohm metre (m).

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 10
We know, R ∝ 1/A or R = ρ(1/A), where proportionality constant ρ is called resistivity. If l = 1m and A = 1m2 , then R = ρ i.e.,resistance = Resistivity.
Assertion & Reason Test: Electrochemistry - Question 11

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : On increasing dilution, the specific conductance keeps on increasing.

Reason : On increasing dilution, degree of ionisation of weak electrolyte increases and molality of ions also increases.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 11
The specific conductivity decreases while equivalent and molar conductivities increase with dilution.
Assertion & Reason Test: Electrochemistry - Question 12

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : Galvanised iron does not rust.

Reason : Zinc has a more negative electrode potential than iron.

Detailed Solution for Assertion & Reason Test: Electrochemistry - Question 12
Zinc metal which has a more negative electrode potential than iron will provide electrons in preference of the iron, and therefore corrodes first. Only when all the zinc has been oxidised, the iron starts to rust.
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