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

Question # 1

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 # 2

Discuss E2 mechanism.

Ans 1: In E2 mechanism the nucleophile attacks and the leaving group leaves at the same time with formation of carbon carbon double bond.

Question # 3

What are b-elimination reaction?

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

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 # 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

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 # 8

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 # 9

What are primary and tertiary Alkyl Halides?

Ans 1: In a primary alkyl halide halogen atom is attached with carbon which is further attached to one or more carbon atom.In a tertiary alkyl halide halogen atom is attached with a carbon which is further attached to three carbon atom.

Question # 10

Write down the main factors on which reactivity of Alkyl halides depends.

Ans 1: There are two main factors which govern the reactivity of R-X bond.
C-X bonds: Strength of bond in compound would be the most reactive one while fluro compound will be the least reactive.
C-X bond polarity:The greatest electronegativity difference between carbon and fluorine atoms in alkyl fluorides,If an electrophile is the attaching reagent then this difference suggest that alkyl fluorides would be the most reactive alkyl halides.

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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

How will you prepare Ethyl chloride using thionylchloride.

Discuss E2 mechanism.

What are b-elimination reaction?

Give mechanism of E1 elimination reaction in two steps.

Why does SN2mechanism give a product with inversion of configuration?

Why the reactivity of Alkyl halides depend upon Bind Energy.

Give importance of Grignard reagents?

Explain terms Leaving Group and Electrophile.

What are primary and tertiary Alkyl Halides?

Write down the main factors on which reactivity of Alkyl halides depends.

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

How will you prepare Ethyl chloride using thionylchloride.

Discuss E2 mechanism.

What are b-elimination reaction?

Give mechanism of E1 elimination reaction in two steps.

Why does SN2mechanism give a product with inversion of configuration?

Why the reactivity of Alkyl halides depend upon Bind Energy.

Give importance of Grignard reagents?

Explain terms Leaving Group and Electrophile.

What are primary and tertiary Alkyl Halides?

Write down the main factors on which reactivity of Alkyl halides depends.

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

What is Grignard reagent ?How it is prepared?

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

Give reason for reactivity Grignard reagent?

Discuss E2 mechanism.

Give importance of Grignard reagents?

Inversion of configuration is 50% in Sn1.Explain?

How will you prepare Ethyl chloride using thionylchloride.

Why alkyl halides are more reactive than alkanes?

Give general mechanism pattern of Sn2 reaction?

Define Primary Alkyl Halides and secondary alkyl Halides.

12th Class Chemistry Chapter 10 Preparation

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Why does SN₂mechanism give a product with inversion of configuration?

Why does SN₂mechanism give a product with inversion of configuration?

Inversion of configuration is 50% in S_n1.Explain?

Give general mechanism pattern of S_n2 reaction?