What is Electrochemical Equivalence ?

What is Electrochemical Equivalence ?
by

1 Answer

Answer :

One ampere conducts an electric current for one second, that is , one coulomb conducts an electric current.
by

Related questions

What is light equivalence ?

Description : What is light equivalence ?

Last Answer : If one of the two configurations having the same molecular and structural signal of the light active compound rotates clockwise on the surface of the polarized light and the other counterclockwise, they are called light isosceles and this is called light isosceles.

Why Equivalent Mass Can Be Called Chemical Equivalence ?

Description : Why Equivalent Mass Can Be Called Chemical Equivalence ?

Last Answer : One ampere conducts an electric current for one second, that is , one coulomb conducts an electric current. On the other hand , the amount of matter stored in the electric gate ( ... in the electrode, like the electrochemical equivalent. So equivalent mass can be called chemical equilibrium.

Using the electrochemical series, how can I explain why manufacturers coat steel nails with zinc rather than copper?

Description : Using the electrochemical series, how can I explain why manufacturers coat steel nails with zinc rather than copper?

Last Answer : Because the use of zinc is…......... Nah you do the work , or its called cheating :P

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e- ... the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → = Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V At cathode (reduction) : MnO-4(aq) + 8H+ ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere. -Chemistry

Description : The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere. -Chemistry

Last Answer : The mechanism of corrosion is explained on the basis of electrochemical theory. By taking example of rusting of iron, we Refer tothe formation of small electrochemical cells on the surface of iron. The redox reaction involves ... net resultant Redox reaction is 2Fe(s) + O2 (g) + 4H+ → 2Fe2+ + 2H2O

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox reaction equation from the two half-reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + ... -reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V Af cathode (reduction) : MnO-4(aq) + 8H+ ( ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

What is Electrochemical Cell ?

Description : What is Electrochemical Cell ?

Last Answer : Electrochemical cell is a type of cell through which electricity can be generated from chemical energy.

n electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a – (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator

Description : n electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a – (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator

Last Answer : (3) Uninterrupted power supply (UPS) Explanation: A Galvanic cell, also known as battery, is an electro-chemical cell that derives electrical energy from spontaneous redox reactions taking place within ... produce direct current. A battery is a set of galvanic cells that are connected in parallel.

The rusting of iron is a/an - (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Description : The rusting of iron is a/an - (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Last Answer : (2) electrochemical change Explanation: When iron is exposed to air and moisture, its surface gradually corroded and converted into a brown mass. The rusting of iron is due to the formation of hydrated ion. Rusting is an electro-chemical process.

The deterioration of a metal by an electrochemical process is commonly termed as – (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Description : The deterioration of a metal by an electrochemical process is commonly termed as – (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Last Answer : (2) Corrosion Explanation: Corrosion can be defined as the deterioration of materials by chemical processes.

What would happen if salt bridge is not used in electrochemical cell ?

Description : What would happen if salt bridge is not used in electrochemical cell ?

Last Answer : Ans. :- The cell works for short time .After that electrons stop flowing from anode to cathode due to accumulation of +ve ions at anode and no reduction will occur at cathode . The result is that current stops flowing and cell will not work .

What is meant by Electrochemical cell . Why is it called as galvanic cell and Voltaic cell ?

Description : What is meant by Electrochemical cell . Why is it called as galvanic cell and Voltaic cell ?

Last Answer : Ans. :- The cell which converts chemical energy into electrical energy . It is called as galvanic cell and Voltaic cell after the name of scientists who first tried to convert chemical energy into electrical energy .

What is the principle of electrochemical cell ?

Description : What is the principle of electrochemical cell ?

Last Answer : Ans .:- The cell works on the principle of redox reactions . One of the reactant undergoes oxidation while another undergoes reduction

Copper and Silver lie below in the electrochemical series and yet they are found in the combined state as sulphide in nature.Comment.

Description : Copper and Silver lie below in the electrochemical series and yet they are found in the combined state as sulphide in nature.Comment.

Last Answer : Ans. : Due to high polarizing power of Cu and Ag ions, their sulphides are even more stable than the metals. 

During electrolysis of aqeous solution of NaCl, there are two type of anions are present Cl- and –OH, Cl- is discharged first than –OH,although it is present below Cl- in electrochemical series. Give reason.

Description : During electrolysis of aqeous solution of NaCl, there are two type of anions are present Cl- and –OH, Cl- is discharged first than –OH,although it is present below Cl- in electrochemical series. Give reason.

Last Answer : Ans: During this electrolysis process Chloride ions come from NaCl, which is a strong electrolyte and ionize to large extent so concentration of chloride ions in solution will be high. ... chloride ions it is first discharged despite of its presence above than hydroxyl in electrochemical series.

Why cation present below in electrochemical series can discharge before the elements present above them in an electrochemical cell?

Description : Why cation present below in electrochemical series can discharge before the elements present above them in an electrochemical cell?

Last Answer : Ans: This is because their ability to be reduced (reduction potential) is more than the cation present above them in electrochemical series. So they take electrons before the other cations and get discharged.

Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have to measure the cell potential to obtain the difference in potential energy because the potential of half-reactions cannot be measured directly. C The direction of a redox reaction can only be determined experimentally. D Half-cell potentials for half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

Description : Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have ... half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

Last Answer : C The direction of a redox reaction can only be determined experimentally. 

What is the purpose of the salt bridge in an electrochemical cell? w) It allows ion migration. x) It allows electron flow. y) It prevents ion migration. z) It prevents electron flow.

Description : What is the purpose of the salt bridge in an electrochemical cell? w) It allows ion migration. x) It allows electron flow. y) It prevents ion migration. z) It prevents electron flow.

Last Answer : ANSWER: W -- IT ALLOWS ION MIGRATION

The deterioration of a metal by an electrochemical process is commonly termed as (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Description : The deterioration of a metal by an electrochemical process is commonly termed as (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Last Answer : Corrosion

An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a : (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator

Description : An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a : (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator

Last Answer : Battery

The rusting of iron is a/an (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Description : The rusting of iron is a/an (1) physical change (2) electrochemical change (3) electrical change (4) None of the above

Last Answer : electrochemical change

Name any four factors affecting electrochemical corrosion.

Description : Name any four factors affecting electrochemical corrosion.

Last Answer : A) Nature of metal:  1) Position of metal in a galvanic series: A metal having higher position in a galvanic series has more chemical reactivity and therefore, it gets attacked by gaseous and ... as a conducting medium and promotes corrosion. e.g:- Rusting of Fe is promoted in humid atmosphere.

Show that the relation ‘≅’ congruence on the set of all triangles in Euclidean plane geometry is an equivalence relation. -Maths 9th

Description : Show that the relation ‘≅’ congruence on the set of all triangles in Euclidean plane geometry is an equivalence relation. -Maths 9th

Last Answer : Reflexive : A ≅ A True Symmetric : if A ≅ B then B ≅ A True Transitive : if A ≅ B and B ≅ C, then A ≅ C True Therefore, the relation ‘≅’ is an equivalence relation.

Write ‘yes’ if each of the following relations is an equivalence relation. -Maths 9th

Description : Write ‘yes’ if each of the following relations is an equivalence relation. -Maths 9th

Last Answer : (i) is parallel to' is reflexive, because any line is parallel to itself. Symmetric, because if line l is parallel to line m, then line m is parallel to line l. Transitive, because if l || m ... y cannot be a factor of x. (v) No, because the relation is reflexive and transitive but not symmetric.

If R is a relation in N × N defined by (a, b) R (c, d) if and only if ad = bc, show that R is an equivalence relation. -Maths 9th

Description : If R is a relation in N × N defined by (a, b) R (c, d) if and only if ad = bc, show that R is an equivalence relation. -Maths 9th

Last Answer : (i) R is reflexive. For all (a, b) ∈ N N we have (a, b) R (a, b) because ab = ba ⇒ R is reflexive. (ii) R is symmetric. Suppose (a, b) R (c, d) Then (a, b) R (c, d) ⇒ ... ) R (e, f) ⇒ R is transitive. Since R is reflexive, symmetric and transitive, therefore, R is an equivalence relation on N N.

Which of the following is an equivalence relation defined on set A = {1, 2, 3} -Maths 9th

Description : Which of the following is an equivalence relation defined on set A = {1, 2, 3} -Maths 9th

Last Answer : (c) {(1, 1), (2, 2), (3, 1), (1, 3), (3, 3)} Option (c) satisfies all the conditions of an equivalence relation. (1, 1), (2, 2), (3, 3) ∈ R ⇒ (a, a) ∈ R V a ∈ A ⇒ R is reflexive (3, 1) ∈ R and (1, 3) ∈ R ... R and (1, 1) ∈ R ⇒ (a, b) ∈ R, (b, c) ∈ R ⇒ (a, c) ∈ R V a, b, c ∈ A ⇒ R is transitive.

What is equivalence ?

Description : What is equivalence ?

Last Answer : Equivalent Resistance: Using a single resistor instead of an insertion of a resistor, if there is no change in the current flow and voltage difference of the circuit , then that resistor is called a resistive resistor of that insertion.

The octal equivalence of 111010 is A) 81 B) 72 C) 71 D) None of above

Description : The octal equivalence of 111010 is A) 81 B) 72 C) 71 D) None of above

Last Answer : Answer : B

What is zone of equivalence ?

Description : What is zone of equivalence ?

Last Answer : In this, ratio of antigen-antibody is seen optimal which results in large multimolecular lattice, hence maximum precipitation is observed.

For spark ignition engine, the equivalence ratio of mixture entering the combustion chamber has values (A) for idling and for peak power conditions (B) for both idling and peak power conditions (C) for idling and for peak power conditions (D) for both idling and peak power conditions

Description : For spark ignition engine, the equivalence ratio of mixture entering the combustion chamber has values (A) for idling and for peak power conditions (B) for both idling and peak power conditions (C) for idling and for peak power conditions (D) for both idling and peak power conditions

Last Answer : ANSWER (B) for both idling and peak power conditions

Which are needed to compute the logical inference algorithm? a) Logical equivalence b) Validity c) Satisfiability d) All of the mentioned

Description : Which are needed to compute the logical inference algorithm? a) Logical equivalence b) Validity c) Satisfiability d) All of the mentioned

Last Answer : d) All of the mentioned

The idea that irrespective of how a government chooses to increase spending, either by debt financing or tax financing, the outcome will be the same and demand will remain unchanged, is popularly known as: a) Ricardian theory of equivalence b) Ricardian theory of competitive advantage c) Ricardian theory of stability d) None of the above

Description : The idea that irrespective of how a government chooses to increase spending, either by debt financing or tax financing, the outcome will be the same and demand will remain unchanged, is popularly ... b) Ricardian theory of competitive advantage c) Ricardian theory of stability d) None of the above

Last Answer : a) Ricardian theory of equivalence David Ricardo was a British political economist and his most famous theory was that of comparative advantage (along with above theory of Ricardian ... nation should use its resources solely in industries where it has the most international competitiveness

The octal equivalence of 111010 is a. 81 b. 72 c. 71 d. None of above

Description : The octal equivalence of 111010 is a. 81 b. 72 c. 71 d. None of above

Last Answer : b. 72

Which of the following is true about White and Black Box Testing Technique:- a) Equivalance partitioning, Decision Table and Control flow are White box Testing Techniques. b) Equivalence partitioning , Boundary Value Analysis , Data Flow are Black Box Testing Techniques. c) Equivalence partitioning , State Transition , Use Case Testing are black box Testing Techniques. d) Equivalence Partioning , State Transition , Use Case Testing and Decision Table are White Box Testing Techniques.

Description : Which of the following is true about White and Black Box Testing Technique:- a) Equivalance partitioning, Decision Table and Control flow are White box Testing Techniques. b) Equivalence partitioning ... , State Transition , Use Case Testing and Decision Table are White Box Testing Techniques.

Last Answer : c) Equivalence partitioning , State Transition , Use Case Testing are black box Testing Techniques.

One of the fields on a form contains a text box which accepts alphabets in lower or upper case. Identify the invalid Equivalence class value. a. CLASS b. cLASS c. CLass d. CLa01ss

Description : One of the fields on a form contains a text box which accepts alphabets in lower or upper case. Identify the invalid Equivalence class value. a. CLASS b. cLASS c. CLass d. CLa01ss

Last Answer : d. CLa01ss

In a system designed to work out the tax to be paid:An employee has £4000 of salary tax free. The next £1500 is taxed at 10% the next £28000 is taxed at 22%. Any further amount is taxed at 40% Which of these groups of numbers would fall into the same equivalence class? a) £4800; £14000; £28000 b) £5200; £5500; £28000 c) £28001; £32000; £35000 d) £5800; £28000; £32000

Description : In a system designed to work out the tax to be paid:An employee has £4000 of salary tax free. The next £1500 is taxed at 10% the next £28000 is taxed at 22%. Any further amount is taxed at 40% ... ) £4800; £14000; £28000 b) £5200; £5500; £28000 c) £28001; £32000; £35000 d) £5800; £28000; £32000

Last Answer : d) £5800; £28000; £32000

Evaluating testability of the requirements and system are a part of which phase:- a) Test Analysis and Design b) Test Planning and control c) Test Implementation and execution d) Evaluating exit criteria and reporting Q4. One of the fields on a form contains a text box which accepts alphabets in lower or upper case. Identify the invalid Equivalence class value.

Description : Evaluating testability of the requirements and system are a part of which phase:- a) Test Analysis and Design b) Test Planning and control c) Test Implementation and execution d) Evaluating ... text box which accepts alphabets in lower or upper case. Identify the invalid Equivalence class value.

Last Answer : a) Test Analysis and Design

Which technique can be used to achieve input and output coverage? It can be applied to human input, input via interfaces to a system, or interface parameters in integration testing. A. Error Guessing B. Boundary Value Analysis C. Decision Table testing D. Equivalence partitioning

Description : Which technique can be used to achieve input and output coverage? It can be applied to human input, input via interfaces to a system, or interface parameters in integration testing. A. Error Guessing B. Boundary Value Analysis C. Decision Table testing D. Equivalence partitioning

Last Answer : D. Equivalence partitioning

When testing a grade calculation system, a tester determines that all scores from 90 to 100 will yield a grade of A, but scores below 90 will not. This analysis is known as: A. Equivalence partitioning B. Boundary value analysis C. Decision table D. Hybrid analysis

Description : When testing a grade calculation system, a tester determines that all scores from 90 to 100 will yield a grade of A, but scores below 90 will not. This analysis is known as: A. Equivalence partitioning B. Boundary value analysis C. Decision table D. Hybrid analysis

Last Answer : A. Equivalence partitioning

When testing a grade calculation system, a tester determines that all scores from 90 to 100 will yield a grade of A, but scores below 90 will not. This analysis is known as: A. Equivalence partitioning B. Boundary value analysis C. Decision table D. Hybrid analysis

Description : When testing a grade calculation system, a tester determines that all scores from 90 to 100 will yield a grade of A, but scores below 90 will not. This analysis is known as: A. Equivalence partitioning B. Boundary value analysis C. Decision table D. Hybrid analysis

Last Answer : B. Boundary value analysis

Given the following specification, which of the following values for age are in the SAME equivalence partition? If you are less than 18, you are too young to be insured. Between 18 and 30 inclusive, you will receive a 20% discount. Anyone over 30 is not eligible for a discount. A. 17, 18, 19. B. 29, 30, 31. C. 18, 29, 30. D. 17, 29, 31.

Description : Given the following specification, which of the following values for age are in the SAME equivalence partition? If you are less than 18, you are too young to be insured. Between 18 and 30 inclusive, you will receive a 20% discount. Anyone ... 17, 18, 19. B. 29, 30, 31. C. 18, 29, 30. D. 17, 29, 31.

Last Answer : C. 18, 29, 30.

f the temperature falls below 18 degrees, the heating is switched on. When the temperature reaches 21 degrees, the heating is switched off. What is the minimum set of test input values to cover all valid equivalence partitions? A. 15, 19 and 25 degrees B. 17, 18, 20 and 21 degrees C. 18, 20 and 22 degrees D. 16 and 26 degrees

Description : f the temperature falls below 18 degrees, the heating is switched on. When the temperature reaches 21 degrees, the heating is switched off. What is the minimum set of test input values to cover all valid equivalence ... 17, 18, 20 and 21 degrees C. 18, 20 and 22 degrees D. 16 and 26 degrees

Last Answer : A. 15, 19 and 25 degrees

A thermometer measures temperature in whole degrees only. If the temperature falls below 18 degrees, the heating is switched off. It is switched on again when the temperature reaches 21 degrees. What are the best values in degrees to cover all equivalence partitions? A. 15,19 and 25. B. 17,18 and19. C. 18, 20 and22. D. 16, 26 and 32.

Description : A thermometer measures temperature in whole degrees only. If the temperature falls below 18 degrees, the heating is switched off. It is switched on again when the temperature reaches 21 degrees. What are the best values in degrees to ... and 25. B. 17,18 and19. C. 18, 20 and22. D. 16, 26 and 32.

Last Answer : A. 15,19 and 25.

One of the fields on a form contains a text box which accepts alpha numeric values. Identify the Valid Equivalence class A. BOOK B. Book C. Boo01k D. book

Description : One of the fields on a form contains a text box which accepts alpha numeric values. Identify the Valid Equivalence class A. BOOK B. Book C. Boo01k D. book

Last Answer : C. Boo01k

Which technique can be used to achieve input and output coverage? It can be applied to human input, input via interfaces to a system, or interface parameters in integration testing. a) Error Guessing b) Boundary Value Analysis c) Decision Table testing d) Equivalence partitioning

Description : Which technique can be used to achieve input and output coverage? It can be applied to human input, input via interfaces to a system, or interface parameters in integration testing. a) Error Guessing b) Boundary Value Analysis c) Decision Table testing d) Equivalence partitioning

Last Answer : d) Equivalence partitioning

Find the Equivalence class for the following test case Enter a number to test the validity of being accepting the numbers between 1 and 99 A. All numbers < 1 B. All numbers > 99 C. Number = 0 D. All numbers between 1 and 99

Description : Find the Equivalence class for the following test case Enter a number to test the validity of being accepting the numbers between 1 and 99 A. All numbers < 1 B. All numbers > 99 C. Number = 0 D. All numbers between 1 and 99

Last Answer : D. All numbers between 1 and 99

Find the invalid equivalence class for the following test case Draw a line up to the length of 4 inches A. Line with 1 dot-width B. Curve C. Line with 4 inches D. None of the above

Description : Find the invalid equivalence class for the following test case Draw a line up to the length of 4 inches A. Line with 1 dot-width B. Curve C. Line with 4 inches D. None of the above

Last Answer : B. Curve

One technique of Black Box testing is Equivalence Partitioning. In a programstatement that accepts only one choice from among 10 possible choices,numbered 1 through 10, the middle partition would be from _____ to _____ a) 4 to 6 b) 0 to 10 c) 1 to 10 d) None of the above

Description : One technique of Black Box testing is Equivalence Partitioning. In a programstatement that accepts only one choice from among 10 possible choices,numbered 1 through 10, the middle partition would be from _____ to _____ a) 4 to 6 b) 0 to 10 c) 1 to 10 d) None of the above

Last Answer : c) 1 to 10

Which of the following designs permits a comparison of pretest scores to determine the initial equivalence of groups on the pretest before the treatment variable is introduced into the research setting. a. One-group pretest-posttest design b. Pretest-posttest control group design c. Posttest-only design with nonequivalent groups d. Both b and c

Description : Which of the following designs permits a comparison of pretest scores to determine the initial equivalence of groups on the pretest before the treatment variable is introduced into the research setting. a. ... control group design c. Posttest-only design with nonequivalent groups d. Both b and c

Last Answer : b. Pretest-posttest control group design

The octal equivalence of 111010 is a. 81 b. 72 c. 71 d. None of above

Description : The octal equivalence of 111010 is a. 81 b. 72 c. 71 d. None of above

Last Answer : b. 72