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

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

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 # 3

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 # 4

Give mechanism of E1 elimination reaction in two steps.

Ans 1: .In E1 mechanism the first step is the slow ionization of the substrate to give a carbocation.In the second step the nucleophile attacks on hydrogen to give an alkene as a product.

Question # 5

Write down any two method for the preparation of Alkyl halides?

Ans 1: 1.Alchol may be converted to the corrosponding alkyl halide by the action of halogen acid in the presence of ZnCI₂ which acts as catslyst.
2.Alcholo reacts with th;onyl chloride in pyrindine as a solvent to give alkyl chlorides which escape leaving behind the pure product.

Question # 6

What is the role of stability of carbonium ion in deciding the Mechanism of substitution reaction.

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

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

Why does SN₂mechanism give a product with inversion of configuration?

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

Question # 9

Explain terms Leaving Group and Electrophile.

Ans 1: Leaving group:leaving group is nucleophile which leave during substitution reaction of alkyl halide,It departs with an unshared pair of electron If we wish a S_nreaction to proceed in the forward direction the incoming nucleophile must be stronger than the departing one,CI,Br,I are goof nucleophile as well as a goof leaving group.
Electrophile: It is a specie which attracts electrons.The carbon atom of an alkyl group attaches with the halogen atom and bearing a partial positive charged is called an electrophile center,An electrophile may be neutral or positively charged.

Question # 10

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.

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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?

Give importance of Grignard reagents?

What are elimination reaction?

Give mechanism of E1 elimination reaction in two steps.

Write down any two method for the preparation of Alkyl halides?

What is the role of stability of carbonium ion in deciding the Mechanism of substitution reaction.

How will you prepare Ethyl chloride using thionylchloride.

Why does SN2mechanism give a product with inversion of configuration?

Explain terms Leaving Group and Electrophile.

What is Grignard reagent ?How it is prepared?

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?

Give importance of Grignard reagents?

What are elimination reaction?

Give mechanism of E1 elimination reaction in two steps.

Write down any two method for the preparation of Alkyl halides?

What is the role of stability of carbonium ion in deciding the Mechanism of substitution reaction.

How will you prepare Ethyl chloride using thionylchloride.

Why does SN2mechanism give a product with inversion of configuration?

Explain terms Leaving Group and Electrophile.

What is Grignard reagent ?How it is prepared?

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

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

Convert C2H5CI to T.E.L.

Discuss E2 mechanism.

Why the reactivity of Alkyl halides depend upon Bind Energy.

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

How will you prepare Ethyl chloride using thionylchloride.

Give mechanism of E1 elimination reaction in two steps.

What is the role of stability of carbonium ion in deciding the Mechanism of substitution reaction.

Why does SN2mechanism give a product with inversion of configuration?

Write down any two method for the preparation of Alkyl halides?

12th Class Chemistry Chapter 10 Preparation

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Give general mechanism pattern of S_n2 reaction?

Why does SN₂mechanism give a product with inversion of configuration?

Give general mechanism pattern of S_n2 reaction?

Why does SN₂mechanism give a product with inversion of configuration?

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

Convert C₂H₅CI to T.E.L.

Why does SN₂mechanism give a product with inversion of configuration?