Fsc part 2 Online Preparation for Chemistry Chapter 10 (Alkhl Halidies)

Online Short Questions For Chapter 10 "12th Class Chemistry Chapter 10 Short Questions Preparation "

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Chemistry - 12th Class Chemistry Chapter 10 Short Questions Preparation

Question # 1

Give general mechanism pattern of S_n2 reaction?

Ans 1: In nucleophilic substitution bimolecular the reaction of attack of the attaching nucleophile is from the side which is opposite to the leaving group.In order to give the nucleophile enough room to attack the substrate carbons atom changes its state of hybridization from tetrahedral to planner sp².

Question # 2

Convert C₂H₅CI to T.E.L.

Ans 1: Ethyl chloride react with sodium lead alloy giving tetraethyl lead ,This compound is important anti knock agent and used in gasoline.
C₂H₅CI + Na₄Pb ----(C₂H₅)₄PB + 4 NaCI

Question # 3

Define Primary Alkyl Halides and secondary alkyl Halides.

Ans 1: The alkyl halides in which halogen atom halogen atom is attached with carbon which is further atached to one or no carbon atom is called primary alkyl halide.
Secondry alkyl Halide:The alkyl halides in which halogen atom is attached with a carbon which is durther attached to two carbon atom is called secondry alkyl halide.

Question # 4

Reaction of ethyl bromide with OH nucleophile is S_n2 justify?

Ans 1: In nucleophilic substitution bimolecular the direction of attack of OH^-,the attaching nucleophile is from the side which is opposite to the leaving group ,in order to give to the nucleophile enough room to attack on ethyl bromide the substrate carbon atom changes its state of hybridization from tetrahedral.

Question # 5

Give reason for reactivity Grignard reagent?

Ans 1: The reactivity of Grignard reagent is due to the nature of C-mg Bond which is highly polar,Magnesium is more electropositive than carbons and the C-mg bond though covalent is highly polar ,giving alkyl carbons the partial negative charge,This negative charge is unusual character which makes the alkyl group highly reactive towards electrophile center. Mostly reaction shown by Grignard reagent are exothermic.

Question # 6

Why the reactivity of Alkyl halides depend upon Bind Energy.

Ans 1: The strength of bond shows that iodo compound with the weakest bonds would be the most reactive one whlefluor compound will be the leat reactive i.e the order of reactivity of alkyl halid should be R-I>R-Br>R-CI>R-F

Question # 7

Why alkyl halides are more reactive than alkanes?

Ans 1: An alkyl halides molecule consists of two parts,an alkyl group with a partial positive charge on the carbon atom attached to halogen atom and the halide atom with partial negative charge,While alkanes have no partial position or negative charged sites in their molecules.Halogens atom attached to alkyl groups is more electronegative which makes the alkyl and halide weak bonds.

Question # 8

Give importance of Grignard reagents?

Ans 1: Grignard reagents is so important in organic synthesis that almost almost all the classes of organic compound can be prepared from them.,Due to their importance and application Victor Grignared was awarded Nobel Prize in chemistry.

Question # 9

During S_n1 reaction,What is the significance of first step?

Ans 1: The first step involved the breakage of a covalent bond so it is slow step as compared to the second step which involve the energetically favourable combination of ions,the first step is therefore called the rate determining step.The mechanism step is called unimolecular because only one molecule take part in the rate determining step.

Question # 10

What are elimination reaction?

Ans 1: When nucleophile attacks on hydrogen atom attached to the b carbon of the alkyl halide,we get an alkene such type of reaction are called elimination reaction.

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Prepare Complete Set Wise Questions For Chapter 10 "12th Class Chemistry Chapter 10 Short Questions Preparation "

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Set 2

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12th Class Chemistry Chapter 10 Short Questions Preparation - Set 1

Question # 1

Give general mechanism pattern of S_n2 reaction?

Ans 1: In nucleophilic substitution bimolecular the reaction of attack of the attaching nucleophile is from the side which is opposite to the leaving group.In order to give the nucleophile enough room to attack the substrate carbons atom changes its state of hybridization from tetrahedral to planner sp².

Question # 2

Convert C₂H₅CI to T.E.L.

Ans 1: Ethyl chloride react with sodium lead alloy giving tetraethyl lead ,This compound is important anti knock agent and used in gasoline.
C₂H₅CI + Na₄Pb ----(C₂H₅)₄PB + 4 NaCI

Question # 3

Define Primary Alkyl Halides and secondary alkyl Halides.

Ans 1: The alkyl halides in which halogen atom halogen atom is attached with carbon which is further atached to one or no carbon atom is called primary alkyl halide.
Secondry alkyl Halide:The alkyl halides in which halogen atom is attached with a carbon which is durther attached to two carbon atom is called secondry alkyl halide.

Question # 4

Reaction of ethyl bromide with OH nucleophile is S_n2 justify?

Ans 1: In nucleophilic substitution bimolecular the direction of attack of OH^-,the attaching nucleophile is from the side which is opposite to the leaving group ,in order to give to the nucleophile enough room to attack on ethyl bromide the substrate carbon atom changes its state of hybridization from tetrahedral.

Question # 5

Give reason for reactivity Grignard reagent?

Ans 1: The reactivity of Grignard reagent is due to the nature of C-mg Bond which is highly polar,Magnesium is more electropositive than carbons and the C-mg bond though covalent is highly polar ,giving alkyl carbons the partial negative charge,This negative charge is unusual character which makes the alkyl group highly reactive towards electrophile center. Mostly reaction shown by Grignard reagent are exothermic.

Question # 6

Why the reactivity of Alkyl halides depend upon Bind Energy.

Ans 1: The strength of bond shows that iodo compound with the weakest bonds would be the most reactive one whlefluor compound will be the leat reactive i.e the order of reactivity of alkyl halid should be R-I>R-Br>R-CI>R-F

Question # 7

Why alkyl halides are more reactive than alkanes?

Ans 1: An alkyl halides molecule consists of two parts,an alkyl group with a partial positive charge on the carbon atom attached to halogen atom and the halide atom with partial negative charge,While alkanes have no partial position or negative charged sites in their molecules.Halogens atom attached to alkyl groups is more electronegative which makes the alkyl and halide weak bonds.

Question # 8

Give importance of Grignard reagents?

Ans 1: Grignard reagents is so important in organic synthesis that almost almost all the classes of organic compound can be prepared from them.,Due to their importance and application Victor Grignared was awarded Nobel Prize in chemistry.

Question # 9

During S_n1 reaction,What is the significance of first step?

Ans 1: The first step involved the breakage of a covalent bond so it is slow step as compared to the second step which involve the energetically favourable combination of ions,the first step is therefore called the rate determining step.The mechanism step is called unimolecular because only one molecule take part in the rate determining step.

Question # 10

What are elimination reaction?

Ans 1: When nucleophile attacks on hydrogen atom attached to the b carbon of the alkyl halide,we get an alkene such type of reaction are called elimination reaction.

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12th Class Chemistry Chapter 10 Short Questions Preparation - Set 2

Question # 1

Define Nucleophile.

Ans 1: Nucleophile means nucleus loving ,It has an unshared electron paired available for bonding and in most cases it is basic in character,It may have negatively charged or neutral.

Question # 2

Define Primary Alkyl Halides and secondary alkyl Halides.

Ans 1: The alkyl halides in which halogen atom halogen atom is attached with carbon which is further atached to one or no carbon atom is called primary alkyl halide.
Secondry alkyl Halide:The alkyl halides in which halogen atom is attached with a carbon which is durther attached to two carbon atom is called secondry alkyl halide.

Question # 3

During S_n1 reaction,What is the significance of first step?

Ans 1: The first step involved the breakage of a covalent bond so it is slow step as compared to the second step which involve the energetically favourable combination of ions,the first step is therefore called the rate determining step.The mechanism step is called unimolecular because only one molecule take part in the rate determining step.

Question # 4

What is Grignard reagent ?How it is prepared?

Ans 1: R-Mg-X known as Grignard reagent ,These are derivatives of alkyl halided belonging to class of organo metallic compounds .Grignard reagent was first prepared by Victor Grignard in 1900. Grignard reagent is so important in organic synthesis that almost all the classes of organic compounds can be prepared from them,Due to their importance and organic compounds can be prepared from them.

Question # 5

Why alkyl halides are more reactive than alkanes?

Ans 1: An alkyl halides molecule consists of two parts,an alkyl group with a partial positive charge on the carbon atom attached to halogen atom and the halide atom with partial negative charge,While alkanes have no partial position or negative charged sites in their molecules.Halogens atom attached to alkyl groups is more electronegative which makes the alkyl and halide weak bonds.

Question # 6

What is the natural of C-mg bond in R-mg-X?

Ans 1: The reactivity of Grignard reagent is due to the nature of C-mg bond which is highly polar, Magnesium is more electropositive than carbons and the C-mg bond though covalent is highly polar ,giving alkyl carbons the partial negative charge,This negative charge is unusual character which makes the alkyl group highly reactive towards electrophile center.

Question # 7

How will you prepare Ethyl chloride using thionylchloride.

Ans 1: Alcholos reacts with thinoyl chloride in pyridine as a solving to give alkyl chlorides This method is especially useful since the by production are gases which escape leaving behind the pure product.

Question # 8

What are elimination reaction?

Ans 1: When nucleophile attacks on hydrogen atom attached to the b carbon of the alkyl halide,we get an alkene such type of reaction are called elimination reaction.

Question # 9

Give general mechanism pattern of S_n2 reaction?

Ans 1: In nucleophilic substitution bimolecular the reaction of attack of the attaching nucleophile is from the side which is opposite to the leaving group.In order to give the nucleophile enough room to attack the substrate carbons atom changes its state of hybridization from tetrahedral to planner sp².

Question # 10

Give importance of Grignard reagents?

Ans 1: Grignard reagents is so important in organic synthesis that almost almost all the classes of organic compound can be prepared from them.,Due to their importance and application Victor Grignared was awarded Nobel Prize in chemistry.

Submit

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12th Class Chemistry Chapter 10 Preparation

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Fsc part 2 Online Preparation for Chemistry Chapter 10 (Alkhl Halidies)

Online Short Questions For Chapter 10 "12th Class Chemistry Chapter 10 Short Questions Preparation "

Chemistry - 12th Class Chemistry Chapter 10 Short Questions Preparation

Give general mechanism pattern of Sn2 reaction?

Convert C2H5CI to T.E.L.

Define Primary Alkyl Halides and secondary alkyl Halides.

Reaction of ethyl bromide with OH nucleophile is Sn2 justify?

Give reason for reactivity Grignard reagent?

Why the reactivity of Alkyl halides depend upon Bind Energy.

Why alkyl halides are more reactive than alkanes?

Give importance of Grignard reagents?

During Sn1 reaction,What is the significance of first step?

What are elimination reaction?

Prepare Complete Set Wise Questions For Chapter 10 "12th Class Chemistry Chapter 10 Short Questions Preparation "

Set 1

Set 2

12th Class Chemistry Chapter 10 Short Questions Preparation - Set 1

Give general mechanism pattern of Sn2 reaction?

Convert C2H5CI to T.E.L.

Define Primary Alkyl Halides and secondary alkyl Halides.

Reaction of ethyl bromide with OH nucleophile is Sn2 justify?

Give reason for reactivity Grignard reagent?

Why the reactivity of Alkyl halides depend upon Bind Energy.

Why alkyl halides are more reactive than alkanes?

Give importance of Grignard reagents?

During Sn1 reaction,What is the significance of first step?

What are elimination reaction?

12th Class Chemistry Chapter 10 Short Questions Preparation - Set 2

Define Nucleophile.

Define Primary Alkyl Halides and secondary alkyl Halides.

During Sn1 reaction,What is the significance of first step?

What is Grignard reagent ?How it is prepared?

Why alkyl halides are more reactive than alkanes?

What is the natural of C-mg bond in R-mg-X?

How will you prepare Ethyl chloride using thionylchloride.

What are elimination reaction?

Give general mechanism pattern of Sn2 reaction?

Give importance of Grignard reagents?

12th Class Chemistry Chapter 10 Preparation

Is this page helpful?

Give general mechanism pattern of S_n2 reaction?

Convert C₂H₅CI to T.E.L.

Reaction of ethyl bromide with OH nucleophile is S_n2 justify?

During S_n1 reaction,What is the significance of first step?

Give general mechanism pattern of S_n2 reaction?

Convert C₂H₅CI to T.E.L.

Reaction of ethyl bromide with OH nucleophile is S_n2 justify?

During S_n1 reaction,What is the significance of first step?

During S_n1 reaction,What is the significance of first step?

Give general mechanism pattern of S_n2 reaction?