Online Short Questions For Chapter 10 "11th Class Chemistry Short Questions Chapter 10 Preparation "

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Chemistry - 11th Class Chemistry Short Questions Chapter 10 Preparation

Question # 1

What is Anodized Aluminum?

Ans 1: When a thin layer of oxide is formed over the surface of aluminium metal it is called anodized aluminium.Anodized aluminium is prepared by making it anode in an electrolyte cell containing sulphuric acid or chromic acid, Which costs a thin layer of oxide on it.Aluminium oxide layer resist the attack by corrosive agents.

Question # 2

Define the electrochemical serie?

Ans 1: The elements are arranged in the order of their standard electrode potentials on the hydrogen scale, the resulting list is known as electrochemical series. This list have been prepared by comparison with standard hydrogen electrode (SHE).In this list, elements above SHE have negative reduction potential while below have positive reduction potential .

Question # 3

Differentiate between electrolysis and electrolytic conduction?

Ans 1: Electrolysis; The process in which electricity is used to carry out a non-spontaneous redox reaction is called electrolysis.
Electrolytic Conduction: The conduction of electricity carried out by ions present in fused or aqueous solution of an electrolyte is called electrolytic conduction.

Question # 4

Na and K can displace hydrogen from acids but Pt, Pd and See you cannot.Comment on it?

Ans 1: Greater the value of standard reduction potential , lesser is the ability to loose electrons.Hence its reactivity is less. Na and K are highly reactive metals.They can easily displace hydrogen from acid whereas Pt, Pd See you are least reactive metal.Therefore cannot easily displace hydrogen.

Question # 5

What is meant by electromotive force (emf) of cell?

Ans 1: Electromotive force (emf): The electric current obtained from galvanic cell is a result of electrons being pushed or forced from the negative electrode, throughout an external wire, to positive electrode. The force with which these electrons move throughout the wire is called electromotive force. It is also called potential . It measured in volts.

Question # 6

Give four rules for assigning of oxidation number?

Ans 1:
1. The oxidation number of free elements is zero.For example H, Mg, Na.as charge on the ion.
2. Oxidation number of hydrogen in all its compounds is +1 except metal hydride where it is -1
3. In neutral molecules, the algebric sum of oxidation number of all the elements is zero.

Question # 7

How relative chemical reactivity of metals is studied with the help of electrochemical series.

Ans 1: The value of the reduction potential of a metal or a non metal tells us the tendency to lose electrons and act a reducing agent.It also gives the information about the tendency of a specie to gain electrons and act as oxidizing agent. Greater the value of standard reduction potential of a given specie, greater is its tendency to accept electrons to undergo reduction and hence to act as oxidizing agent.

Question # 8

Give some advantages of fuel cells?

Ans 1:
1. These cell run continuously as long as reactants are available.
2. Theses are light, portable and source of electricity.
3. These are very efficient.They convert about 75% of fuels energy into electricity.

Question # 9

Differentiate between a cell and battery?

Ans 1: Cell: The arrangement in which electrical energy is converted into chemical energy or chemical energy is converted into electrical energy is called cell.
Battery: The combination of two or more cells is called battery.

Question # 10

What is the difference between metallic conduction and electrolytic conduction?

Ans 1: Electrolytic Conduction: The conduction of electricity carried out by ions present is fused or in an aqueous solution of an electrolyte is called electrolytic conduction.
Metallic Conduction: The conduction of electricity through a metal due to free electrons is called metallic conduction.

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Prepare Complete Set Wise Questions For Chapter 10 "11th Class Chemistry Short Questions Chapter 10 Preparation "

Set 1

10 Questions
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Set 2

10 Questions
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11th Class Chemistry Short Questions Chapter 10 Preparation - Set 1

Question # 1

What is Anodized Aluminum?

Ans 1: When a thin layer of oxide is formed over the surface of aluminium metal it is called anodized aluminium.Anodized aluminium is prepared by making it anode in an electrolyte cell containing sulphuric acid or chromic acid, Which costs a thin layer of oxide on it.Aluminium oxide layer resist the attack by corrosive agents.

Question # 2

Define the electrochemical serie?

Ans 1: The elements are arranged in the order of their standard electrode potentials on the hydrogen scale, the resulting list is known as electrochemical series. This list have been prepared by comparison with standard hydrogen electrode (SHE).In this list, elements above SHE have negative reduction potential while below have positive reduction potential .

Question # 3

Differentiate between electrolysis and electrolytic conduction?

Ans 1: Electrolysis; The process in which electricity is used to carry out a non-spontaneous redox reaction is called electrolysis.
Electrolytic Conduction: The conduction of electricity carried out by ions present in fused or aqueous solution of an electrolyte is called electrolytic conduction.

Question # 4

Na and K can displace hydrogen from acids but Pt, Pd and See you cannot.Comment on it?

Ans 1: Greater the value of standard reduction potential , lesser is the ability to loose electrons.Hence its reactivity is less. Na and K are highly reactive metals.They can easily displace hydrogen from acid whereas Pt, Pd See you are least reactive metal.Therefore cannot easily displace hydrogen.

Question # 5

What is meant by electromotive force (emf) of cell?

Ans 1: Electromotive force (emf): The electric current obtained from galvanic cell is a result of electrons being pushed or forced from the negative electrode, throughout an external wire, to positive electrode. The force with which these electrons move throughout the wire is called electromotive force. It is also called potential . It measured in volts.

Question # 6

Give four rules for assigning of oxidation number?

Ans 1:
1. The oxidation number of free elements is zero.For example H, Mg, Na.as charge on the ion.
2. Oxidation number of hydrogen in all its compounds is +1 except metal hydride where it is -1
3. In neutral molecules, the algebric sum of oxidation number of all the elements is zero.

Question # 7

How relative chemical reactivity of metals is studied with the help of electrochemical series.

Ans 1: The value of the reduction potential of a metal or a non metal tells us the tendency to lose electrons and act a reducing agent.It also gives the information about the tendency of a specie to gain electrons and act as oxidizing agent. Greater the value of standard reduction potential of a given specie, greater is its tendency to accept electrons to undergo reduction and hence to act as oxidizing agent.

Question # 8

Give some advantages of fuel cells?

Ans 1:
1. These cell run continuously as long as reactants are available.
2. Theses are light, portable and source of electricity.
3. These are very efficient.They convert about 75% of fuels energy into electricity.

Question # 9

Differentiate between a cell and battery?

Ans 1: Cell: The arrangement in which electrical energy is converted into chemical energy or chemical energy is converted into electrical energy is called cell.
Battery: The combination of two or more cells is called battery.

Question # 10

What is the difference between metallic conduction and electrolytic conduction?

Ans 1: Electrolytic Conduction: The conduction of electricity carried out by ions present is fused or in an aqueous solution of an electrolyte is called electrolytic conduction.
Metallic Conduction: The conduction of electricity through a metal due to free electrons is called metallic conduction.

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11th Class Chemistry Short Questions Chapter 10 Preparation - Set 2

Question # 1

Define electrolytic cell.Give example?

Ans 1: Electrolytic cell: A cell is which electric current is used to carry out a non-spontaneous reaction is called electrolytic cell.
Example:
- Down's cell
- Nelson cell

Question # 2

Describe the relative chemical reactivity of metals?

Ans 1: Metals react by forming their positive ions.If the value of standard reduction potential is greater, the tendency to form positive ions is smaller and therefore less reactivity.It means the elements with greater reduction potential are least reactive where as the elements with smaller reduction potential are more reactive.

Question # 3

What is meant by electromotive force (emf) of cell?

Ans 1: Electromotive force (emf): The electric current obtained from galvanic cell is a result of electrons being pushed or forced from the negative electrode, throughout an external wire, to positive electrode. The force with which these electrons move throughout the wire is called electromotive force. It is also called potential . It measured in volts.

Question # 4

Differentiate between a cell and battery?

Ans 1: Cell: The arrangement in which electrical energy is converted into chemical energy or chemical energy is converted into electrical energy is called cell.
Battery: The combination of two or more cells is called battery.

Question # 5

Define Electrochemistry?

Ans 1: It is the branch of chemistry which deals with the conversion of electrical energy into chemical energy in electrolytic cells as well as the conversion of chemical energy into electrical energy in galvanic or voltaic cell,

Question # 6

How relative chemical reactivity of metals is studied with the help of electrochemical series.

Ans 1: The value of the reduction potential of a metal or a non metal tells us the tendency to lose electrons and act a reducing agent.It also gives the information about the tendency of a specie to gain electrons and act as oxidizing agent. Greater the value of standard reduction potential of a given specie, greater is its tendency to accept electrons to undergo reduction and hence to act as oxidizing agent.

Question # 7

A porous plate or a salt bridge is not required in lead storage cell.Give reason?

Ans 1: A porous plate or salt bridge is used in those cells where two different electrolytes are used and are required to keep separate.In case of lead storage cell, only dil.H₂SO_{4 is used as an electrolyte. Hence, no separation is required by porous plate or salt bridge.}

Question # 8

Give some advantages of fuel cells?

Ans 1:
1. These cell run continuously as long as reactants are available.
2. Theses are light, portable and source of electricity.
3. These are very efficient.They convert about 75% of fuels energy into electricity.

Question # 9

Na and K can displace hydrogen from acids but Pt, Pd and See you cannot.Comment on it?

Ans 1: Greater the value of standard reduction potential , lesser is the ability to loose electrons.Hence its reactivity is less. Na and K are highly reactive metals.They can easily displace hydrogen from acid whereas Pt, Pd See you are least reactive metal.Therefore cannot easily displace hydrogen.

Question # 10

What is Anodized Aluminum?

Ans 1: When a thin layer of oxide is formed over the surface of aluminium metal it is called anodized aluminium.Anodized aluminium is prepared by making it anode in an electrolyte cell containing sulphuric acid or chromic acid, Which costs a thin layer of oxide on it.Aluminium oxide layer resist the attack by corrosive agents.

Submit

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Online Short Questions Preparations

Online Short Questions For Chapter 10 "11th Class Chemistry Short Questions Chapter 10 Preparation "

Chemistry - 11th Class Chemistry Short Questions Chapter 10 Preparation

What is Anodized Aluminum?

Define the electrochemical serie?

Differentiate between electrolysis and electrolytic conduction?

Na and K can displace hydrogen from acids but Pt, Pd and See you cannot.Comment on it?

What is meant by electromotive force (emf) of cell?

Give four rules for assigning of oxidation number?

How relative chemical reactivity of metals is studied with the help of electrochemical series.

Give some advantages of fuel cells?

Differentiate between a cell and battery?

What is the difference between metallic conduction and electrolytic conduction?

Prepare Complete Set Wise Questions For Chapter 10 "11th Class Chemistry Short Questions Chapter 10 Preparation "

Set 1

Set 2

11th Class Chemistry Short Questions Chapter 10 Preparation - Set 1

What is Anodized Aluminum?

Define the electrochemical serie?

Differentiate between electrolysis and electrolytic conduction?

Na and K can displace hydrogen from acids but Pt, Pd and See you cannot.Comment on it?

What is meant by electromotive force (emf) of cell?

Give four rules for assigning of oxidation number?

How relative chemical reactivity of metals is studied with the help of electrochemical series.

Give some advantages of fuel cells?

Differentiate between a cell and battery?

What is the difference between metallic conduction and electrolytic conduction?

11th Class Chemistry Short Questions Chapter 10 Preparation - Set 2

Define electrolytic cell.Give example?

Describe the relative chemical reactivity of metals?

What is meant by electromotive force (emf) of cell?

Differentiate between a cell and battery?

Define Electrochemistry?

How relative chemical reactivity of metals is studied with the help of electrochemical series.

A porous plate or a salt bridge is not required in lead storage cell.Give reason?

Give some advantages of fuel cells?

Na and K can displace hydrogen from acids but Pt, Pd and See you cannot.Comment on it?

What is Anodized Aluminum?

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