ECAT Pre Engineering Chemistry Chapter 21 MCQ Test With Answer

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Abdullah Zubair 05 - Jan - 2025 11 Min 02 Sec 50/120

ECAT Chemistry Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	Grignard's reagent on treatment with chloramine give	A. Acetamide B. Primary amice C. Secondary amice D. Urea
2	Most reactive halide towards S_N1 reaction is	A. n-Butyl chloride B. sec-Butyl chloride C. tert-Butyl choride D. Allyl chloride
3	Metal used in the preparation of Grignard's reagent is:	A. Ca B. Na C. Mg D. Zn
4	CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.	A. CHF Cl C FCl B. CH Cl CF₂Cl C. CHF CF₂Cl D. C FCl CF₂Cl
5	Which one of the following is not a nuclelphile	A. H₂O B. H₂S C. BF₃ D. NH₃
6	Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with	A. Any aromatic amine B. Any primary amine C. Any amine D. Any aliphatic amine
7		A. Primary alkyl halide B. Secondary alkyl halide C. Tertiary alkyl halide D. None of these
8	Alkyl halides on treatment with Zn and HCI gives	A. Alkanes B. Alkenes C. Alkynes D. Alcohols
9	When ethyl iodide and n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is	A. Only one B. Two alkanes C. Three alkanes D. Four alkanes
10	The most reactive compound for electrophilic nitration will be	A. Benzyl chloride B. Benzoic acid C. Nitrobenzene D. Chlorobenzene

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ECAT Pre Engineering Chemistry Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 21 Alkyl Halides

ECAT Chemistry Chapter 21 Alkyl Halides

Which of the following is a nucleophile

Alkyl halides react with Mg in dry ether to form

How many monochlorobutanes will be possible on chlorination of n-butane?

Benzene hexachloride is used as

Alkyl halides on treatment with metallic Na give

Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

When CO2is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

When alkyl halide is heated with aqueous solution of ammonia at 100°C the major product is

To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H2SO4

The rate of E1reaction depends upon

The reaction of an alkyl halide with RCOOAg produces

Which is a weak nucleophile

Alkyl halides are considered to be very reactive compounds towards nucleophiles because

Ethyl chloride on treatment with aqueous alkali gives

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

Primary carbon attaches with other hydrogen atoms directly:

Metal used in the preparation of Grignard's reagent is:

Hydrolysis of Grignard's reagent gives:

When chloroform is boiled with NaOH, it gives

2-Bromopentane is heated with potassium ethoxide in ethanol . The major product obtained is

The rate of E1reaction depends upon:

The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to

Alkyl halides on treatment with Zn and HCI gives

By simply reacting Grignand's reagent with water we get

Elimination bimolecular reactions usually obey

When primary amine reacts with chloroform in ethanolic KOH, then the product is

Most reactive halide towards SN1 reaction is

SN1 reaction of alkylhalides leads to

Grignard reagent is prepared by the reaction of magnesium metal with alkyl halide in the presence of

The elimination of hydrogen halide from adjacent carbon atoms is called

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Top Scorers Of ECAT Chemistry Chapter 21 Alkyl Halides MCQ`s Test

ECAT Chemistry Chapter 21 Important MCQ's

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When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H₂SO₄

The rate of E₁reaction depends upon

The rate of E₁reaction depends upon:

Most reactive halide towards S_N1 reaction is

S_N1 reaction of alkylhalides leads to