What is “redox” reaction?

What is “redox” reaction?
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1 Answer

Answer :

Ans: “The reaction in which both reduction and oxidation takes place is called redox reaction.
Reduction: “Addition of electron in an atom”.
Oxidation: “Removal of electron from an atom”.
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Related questions

In Down’s cell, why the reaction between sodium metal and chlorine gas must be avoided? And how could we prevent reaction between them?

Description : In Down’s cell, why the reaction between sodium metal and chlorine gas must be avoided? And how could we prevent reaction between them?

Last Answer : Ans:In Down’s cell electrolysis of fused NaCl yields sodium metal and chlorine gas .If these are not separated these will react to form Nacl again. So to prevent these reaction in Down’s cell, we place a steel gauze between cathode and anode.

Why gold ,silver and pt are used in making ornaments?

Description : Why gold ,silver and pt are used in making ornaments?

Last Answer : Ans: Because these are nobel metals and therefore their rusting doesn,t occure and also these are very lustorous(shiny),so due to these qualities ,these are used for making ornaments.

Why for chromium plating iron is firstly platted by copper or nickel?

Description : Why for chromium plating iron is firstly platted by copper or nickel?

Last Answer : Ans: Because chromium metal doesn’t adhere directly to the iron properly so it is firstly plated with nickel or copper.

What is electroplating and what is its objective?

Description : What is electroplating and what is its objective?

Last Answer : Ans:The process in which one metal is deposited at other electrolytically. It is very useful process and following are objective of electroplating. (a) Deposition of Nobel metals on inferior metals. (b) Protection of different metals from corrosion. (c) Repair of broken machinery.

How could we prevent H+ ions to be discharged first than Na+ during electrolysis of aqueous solution of NaCl?

Description : How could we prevent H+ ions to be discharged first than Na+ during electrolysis of aqueous solution of NaCl?

Last Answer : Ans: This could be prevented by using mercury cathode during this kind of electrolysis, because H+ ions need high voltage to be discharged at mercury cathode. In this way sodium got discharged at cathode despite H+ ions.

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.

What is modern theory about the existence of the ionic compounds in solid state?

Description : What is modern theory about the existence of the ionic compounds in solid state?

Last Answer : Ans: According to modern theory these exist in form of ions even in solid state for example, sodium chloride exist as Na+ Cl- . Whereas according to the ionic theory it exists as NaCl.

Why sulphuric acid is added to the water during electrolysis of water?

Description : Why sulphuric acid is added to the water during electrolysis of water?

Last Answer : Ans: It is added to increase conduction of the water, because water is a weak electrolyte.

Why carbon electrode is used during electrolysis of Nacl, instead of Pt electrode?

Description : Why carbon electrode is used during electrolysis of Nacl, instead of Pt electrode?

Last Answer : Ans: During electrolysis of Nacl, chlorine gas is produced at anode. Thus to avoid it’s reaction with platinum we use carbon electrode.

Why an electrolyte in molten or fused state is electrically neutral?

Description : Why an electrolyte in molten or fused state is electrically neutral?

Last Answer : Ans: Because the number of + ve charges and –ve charges are equal , so as a result an electrolyte appears to be neutral in nature.

Why ionic compounds are non conductor in solid state and conductor in molten or fused state?

Description : Why ionic compounds are non conductor in solid state and conductor in molten or fused state?

Last Answer : Ans: This is because in solid state there are no free ions and their free movement isn’t possible but in molten or fused state the free movement of ions is possible, so these can conduct electric current.

What is difference between electrolytic and voltaic cell?

Description : What is difference between electrolytic and voltaic cell?

Last Answer : Ans:In electrolytic cell a non-spontaneous redox reaction is carried out with help of electrical energy. Wherease In voltaic cell a spontaneous redox reaction generates the electrical energy.

In a magnetic material, always there exist magnetic dipoles as well as monopoles. State True/False. a) True b) False

Description : In a magnetic material, always there exist magnetic dipoles as well as monopoles. State True/False. a) True b) False

Last Answer : b) False

In a static magnetic field only magnetic dipoles exist. State True/False. a) True b) False

Description : In a static magnetic field only magnetic dipoles exist. State True/False. a) True b) False

Last Answer : a) True

Ionic non polar solid dielectrics contain more than one type of atoms but no permanent dipoles. State True/False a) True b) False

Description : Ionic non polar solid dielectrics contain more than one type of atoms but no permanent dipoles. State True/False a) True b) False

Last Answer : a) True

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.

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.

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. 

Which of the following is/are redox reaction

Description : Which of the following is/are redox reaction

Last Answer : Which of the following is/are redox reaction A. `KCl+K_(2)Cr_(2)O_(7)+con. H_(2)SO_(4)rarrCrO_(2)Cl_(2 ... 2)Cr_(2)O_(7)+2KOHrarr2K_(2)CrO_(4)+H_(2)O`

In the redox reaction . `MnO_(4)^(-)+C^(2)O_(4)^(2-)+H^(+) rarr Mn^(2+)+CO_(2)+H_(2)O` (Unbalance equation) 20 mL of 0.1 M `KMnO_(4)` react quantitive

Description : In the redox reaction . `MnO_(4)^(-)+C^(2)O_(4)^(2-)+H^(+) rarr Mn^(2+)+CO_(2)+H_(2)O` (Unbalance equation) 20 mL of 0.1 M `KMnO_(4)` react quantitive

Last Answer : In the redox reaction . `MnO_(4)^(-)+C^(2)O_(4)^(2-)+H^(+) rarr Mn^(2+)+CO_(2)+H_(2)O` ( ... . 40 mL of 0.1 M oxalate D. 50 mL of 0.25 M oxalate

Assertion :- In a redox reaction, the oxidation number of the oxidant decreases while that of reductant increases. Reason :- Oxidant gains electron(s)

Description : Assertion :- In a redox reaction, the oxidation number of the oxidant decreases while that of reductant increases. Reason :- Oxidant gains electron(s)

Last Answer : Assertion :- In a redox reaction, the oxidation number of the oxidant decreases while that of reductant ... D. If both Assertion & Reason are False.

Which one of the following is not a redox reaction :-

Description : Which one of the following is not a redox reaction :-

Last Answer : Which one of the following is not a redox reaction :- A. `CaCO_(3)rarrCaO+CO_(2)` B. `2H_(2)+O_(2)rarr2H_ ... D. `MnCl_(3)rarr MnCl_(2)+(1)/(2)Cl_(2)`

For the redox reaction `Zn+NO_(3)^(-)rarr Zn^(2+)+NH_(4)^(-)` is basic medium, coefficients of `Zn, NO_(3)^(-) and OH^(-)` in the balanced equation re

Description : For the redox reaction `Zn+NO_(3)^(-)rarr Zn^(2+)+NH_(4)^(-)` is basic medium, coefficients of `Zn, NO_(3)^(-) and OH^(-)` in the balanced equation re

Last Answer : For the redox reaction `Zn+NO_(3)^(-)rarr Zn^(2+)+NH_(4)^(-)` is basic medium, coefficients of `Zn, NO_(3)^(-) ... . 7, 4, 1 C. 4, 1, 10 D. 1, 4, 10

Which is a redox reaction :

Description : Which is a redox reaction :

Last Answer : Which is a redox reaction : A. `2CuI_(2)rarrCuI+I_(2)` B. `NaCl+AgNO_(3)rarrAgCl+NaNO_(3)` C. `NH_(4)Cl ... (4))_(3)+6KOHrarr2Cr(OH)_(3)+3K_(2)SO_(4)`

Which one of the following is a redox reaction ?

Description : Which one of the following is a redox reaction ?

Last Answer : Which one of the following is a redox reaction ? A. `H_(2)+Br_(2)rarr2HBr` B. `2NaCl+H_(2)SO_(4) ... (3)rarrAgCl+HNO_(3)` D. `NaOH+HClrarrNaCl+H_(2)O`

How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii),"conc." H_(2)SO_(4) + KCl rarr),((iii),"conc." H_

Description : How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii),"conc." H_(2)SO_(4) + KCl rarr),((iii),"conc." H_

Last Answer : How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii)," ... ,((ix),"conc." H_(2)SO_(4) + Cu rarr,,):}`

How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii),"conc." H_(2)SO_(4) + KCl rarr),((iii),"conc." H_

Description : How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii),"conc." H_(2)SO_(4) + KCl rarr),((iii),"conc." H_

Last Answer : How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii)," ... ,((ix),"conc." H_(2)SO_(4) + Cu rarr,,):}`

In the redox reaction, `2MnO_(4)^(-)+5C_(2)O_(4)^(2-)+16H^(+) to 2Mn^(2+)+10CO_(2)+8H_(2)O` 20mL of 0.1 M `KMnO_(4)` reacts quantitatively with :

Description : In the redox reaction, `2MnO_(4)^(-)+5C_(2)O_(4)^(2-)+16H^(+) to 2Mn^(2+)+10CO_(2)+8H_(2)O` 20mL of 0.1 M `KMnO_(4)` reacts quantitatively with :

Last Answer : In the redox reaction, `2MnO_(4)^(-)+5C_(2)O_(4)^(2-)+16H^(+) to 2Mn^(2+)+10CO_(2)+8H_(2)O` 20mL ... 50 mL of 0.25 M oxalate D. 50 mL of 0.1 M oxalate

Which of the following is not a redox reaction ?

Description : Which of the following is not a redox reaction ?

Last Answer : Which of the following is not a redox reaction ? A. `KCN+Fe(CN)_(2)rarrK_(4)[Fe(CN)_(6)]` B. `Rb+H_( ... )O_(2)rarrH_(2)O+O` D. `CuI_(2)rarrCuI+I_(2)`

Find the number of compounds among the following whose hydrolysis is a non-redox reaction. `XeF_(2),XeF_(4),XeF_(6),XeO_(2)F_(2),XeOF_(4),Xe,XeO_(3)`

Description : Find the number of compounds among the following whose hydrolysis is a non-redox reaction. `XeF_(2),XeF_(4),XeF_(6),XeO_(2)F_(2),XeOF_(4),Xe,XeO_(3)`

Last Answer : Find the number of compounds among the following whose hydrolysis is a non-redox reaction. `XeF_(2),XeF_(4),XeF_(6),XeO_(2)F_(2),XeOF_(4),Xe,XeO_(3)`

In the redox reaction agno3 plus makes and gtnano3 plus ag which element has been oxidized?

Description : In the redox reaction agno3 plus makes and gtnano3 plus ag which element has been oxidized?

Last Answer : Need answer

How can you justify that a reaction between magnesium and oxygen is a redox reaction w hile the reaction shows only addition of oxygen 2mg plus O 2mgo?

Description : How can you justify that a reaction between magnesium and oxygen is a redox reaction w hile the reaction shows only addition of oxygen 2mg plus O 2mgo?

Last Answer : Oxidation is a redox reaction.

What can be said about a redox reaction that has a positive pontential?

Description : What can be said about a redox reaction that has a positive pontential?

Last Answer : What is the answer ?

How can one determine that a redox reaction will be non spontaneous?

Description : How can one determine that a redox reaction will be non spontaneous?

Last Answer : The reduction potential plus oxidation potential is negative

What is a redox reaction?

Description : What is a redox reaction?

Last Answer : A reaction in which electrons have been transferred from one atom to another.

REDOX REACTION

Description : REDOX REACTION

Last Answer : REDOX REACTION: When oxidation and reduction takes place simultaneously in a given chemical reaction. It is known as redox reaction.

The Classical example of redox reaction is Combustion of fossil fuel. During combustion of fossil fuels, the carbon compound in the fossil fuel reacts with oxygen in the presence of a heat source to form carbon dioxide (CO 2 ) and water. Energy is also needed for the fossil fuel to react with oxygen, so the energy used in portion of combustion is an endothermic reaction.

Description : The Classical example of redox reaction is Combustion of fossil fuel. During combustion of fossil fuels, the carbon compound in the fossil fuel reacts with oxygen in the presence of a heat source to ... to react with oxygen, so the energy used in portion of combustion is an endothermic reaction.

Last Answer : Combustion of fossil fuel

The chemical reaction between Hydrogen sulphide and iodine to give Hydrogen iodide and sulphur is given below: The oxidizing and reducing agents involved in this redox reaction are: (a) Iodine and sulphur respectively (b) Iodine and hydrogen sulphide respectively (c) Sulphur and iodine respectively (d) Hydrogen sulphide and sulphur

Description : The chemical reaction between Hydrogen sulphide and iodine to give Hydrogen iodide and sulphur is given below: The oxidizing and reducing agents involved in this redox reaction are: (a) ... and hydrogen sulphide respectively (c) Sulphur and iodine respectively (d) Hydrogen sulphide and sulphur

Last Answer : (b) Iodine and hydrogen sulphide respectively

What is non-redox sales ? Explain in detail.

Description : What is non-redox sales ? Explain in detail.

Last Answer : When new compounds are formed from one or more reactants, the reaction is called non-redox reaction if electrons are not exchanged between the existing elements.

CuO + H2 = Cu + H2O. This equation is an example of - (1) Oxidation (2) Decomposition (3) Reduction (4) Redox

Description : CuO + H2 = Cu + H2O. This equation is an example of - (1) Oxidation (2) Decomposition (3) Reduction (4) Redox

Last Answer : (4) Redox

What do you mean by redox couple .

Description : What do you mean by redox couple .

Last Answer : Ans.:- Having together oxidised and reduced forms of a substance taking part in oxidation or reduction half reaction .

How many types of non-redox reactions ?

Last Answer : 2 types of non-redox reactions

How many types of redox reactions ?

Last Answer : Redox reaction 2 types

For the redox reation `MnO_(4)^(-)+C_(2)O_(4)^(2-)+H^(+)rarrMn^(2+)CO_(2)+H_(2)O` The correct stoichiometric coefficients of `Mno_(4)^(-),C_(2)O_(4)^(

Description : For the redox reation `MnO_(4)^(-)+C_(2)O_(4)^(2-)+H^(+)rarrMn^(2+)CO_(2)+H_(2)O` The correct stoichiometric coefficients of `Mno_(4)^(-),C_(2)O_(4)^(

Last Answer : For the redox reation `MnO_(4)^(-)+C_(2)O_(4)^(2-)+H^(+)rarrMn^(2+)CO_(2)+H_(2)O` The correct stoichiometric ... . 16, 5, 2 C. 2, 16, 5 D. 5, 2, 16

Which of the following is not a redox change ?

Description : Which of the following is not a redox change ?

Last Answer : Which of the following is not a redox change ? A. `2H_(2)S+SO_(2)rarr2H_(2)O+3S` B. `2BaO+O_(2) ... )+H_(2)O_(2)` D. `2KClO_(3)rarr2KCl+3O_(2)`

Why does it takes several redox reactions in a cell to water from hydrogen and oxygen?

Description : Why does it takes several redox reactions in a cell to water from hydrogen and oxygen?

Last Answer : hydrogen and oxygen combine explosively in a single reaction

What purpose does the cell use energy from redox reactions in cellular respiration?

Description : What purpose does the cell use energy from redox reactions in cellular respiration?

Last Answer : The purpose of cellular respiration is to draw energy, oxygen and also to have carbon dioxide.

In the redox reactions of cellular respiration a cell of uses both?

Description : In the redox reactions of cellular respiration a cell of uses both?

Last Answer : A cell uses both glucose and oxygen in the redox reactions ofcellular respiration.

What purpose does the cell use energy from redox reactions in cellular respiration?

Description : What purpose does the cell use energy from redox reactions in cellular respiration?

Last Answer : The purpose of cellular respiration is to draw energy, oxygen and also to have carbon dioxide.