Haloalkane Quiz » Chemistry-Papers

In SN 1 reaction, the first step involves the formation of -

Free radical

Carbocation

Carbanion

Which of the following is an example of vic-dihalide?

1'1, -dichloroethane

Ethylidene chloride

1,2 -dichloroethane

Which reagent cannot be used to prepare an alkyl halide from an alcohol?

HCl + ZnCl2

SOCl2

NaCl

When ethyl bromide is treated with moist Ag2O the product is -

Ethoxy ethane

Ethyl ether

Ethanol

Which is most reactive for SN2 reactions?

CH3-Br

C3H7-I

C2H5-I

The Reagent used in the gattermann reaction for the preparation of aryl halide

HNO2

Cu/HCl

CuCl/HCl

The ease of dehydrohalogenation of alkyl halides with alcoholic KOH is:

None of these

3∘ > 2∘ > 1∘

3∘ < 2∘ < 1∘

C2H5Cl on heating with alcoholic KOH will produce

C2H2

C2H4

C2H5-OH

A strong solution of alcoholic alkali will preferentially promote alkyl halide into an alkene by -

Elimination

Addition

Substitution

Which would be least reactive towards bromine?

Nitrobenzene

Anisole

Chlorobenzene

The reactivity order of alkyl halides depends upon:

Nature of halogen atom only

Nature of alkyl group only

Nature of both alkyl group and a halogen atom

The reaction of silver carboxylates with bromine dissolved in carbon tetrachloride is called -

Borodine - Hunsdiecker reaction

Hofmann reaction

Borodine reaction

C2H5Cl + AgF ------- C2H5 F + AgCl The above reaction is called -

Swart Rxn

Hunsdiecker

Wurtz

Fluorobenzene is prepared by treating benzene diazonium chloride with fluoroboric acid and heating the product obtained. This reaction is known as:

Gattermann reaction

Schiemann reaction

Sandmeyer reaction

Decreasing order of reactivity of HX in the reaction ROH + HX  RX + H2O--------

HF > HBr > HCl > Hl

HI > HBr > HCl > HF

HBr > HCl > HI > HF

Chlorobenzene can be obtained from benzene diazonium chloride by-

Wurtz reaction

Gattermann's reaction

Fittig reaction.

Ethylidene chloride is a/an______.

gem-dihalide

vic-dihalide

vinylic halide

Which of the following statement is correct -

Decreasing order of density of alkyl halides is RI > RBr > RCI > RF

All are correct

Among isomeric alkyl halides the decrease in boiling point 1º > 2º > 3º

The stability order of alkyl halides is RF > RCl > RBr >RI

Which chloride is the most reactive towards aqueous NaOH in -

Benzyl chloride

Methyl chloride

Chlorobenzene

The alkyl halide that can not give a white precipitate with an alcoholic AgNO3 solution is:

Allyl chloride

Vinyl chloride

Ethyl chloride

An alkyl halide is insoluble in water because-

Alkyl halide does not form hydrogen bond with water

Alkyl halide is non polar & H2O is polar

None of these

When an alkyl halide reacts with an alkoxide, the product is-

Ether

Alcohol

Ester

Which reaction is termed as Darzen's Reaction--

ROH + HCl

ROH + PCl3

ROH + SOCl2

C6H5Cl is prepared by aniline with

Cu2Cl2 + HCl

both

HNO2 and then heated with Cu2Cl2

Benzene reacts with methyl chloride in the presence of anhydrous AlCl3 to give

n-Propylbenzene

methylbenzene

No reaction

In Finkelstein Reaction, which reactants are used

NaI + acetone

NaI + ethanol

KI + ethanol

What would be the major product when Ethyl bromide reacts with silver nitrite

Ethane

Ethyl nitrite

Nitroethane

SN-2 reaction will be fastest in:

CH3CH2-Cl

CH3-Cl