ECAT Pre Engineering Chemistry Chapter 21 MCQ Test With Answer

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ECAT Chemistry Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	2-Bromopentane is heated with potassium ethoxide in ethanol . The major product obtained is	A. 2-Ethoxypentane B. Pent-1-ene C. cis-Pent-2-ene D. trans-Pent-2-ene
2	Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called	A. Primary alkyl halides B. Secondary alkyl halides C. Tertiary alkyl halides D. Quaternary alkyl halides
3		A. NH₃ HCl B. KCN in C₂H₅OH NaOH C. KCN in C₂H₅OH HCl D. HCN NaOH
4	An electrophile may be	A. Positive B. Negative C. Neutral D. Both c and a
5	Which one of the following is not a nucleophile	A. H₂O B. H₂S C. BF₃ D. NH₃
6	Ethyl bromide on treatment with alcoholic KOH gives	A. Ethylene B. Ethanol C. Acetic Acid D. Ethane
7	Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?	A. HCl + anhyd. Zncl₂ B. NaCl C. PCl₅ D. SOCl₂
8	Thre rate of S_N2 reaction depends upon the	A. Concentration of alkyl halides B. Concentration of nucleophile C. Concentration of alkyl halides and nucleophile D. None of the above
9	Grignard's reagent on treatment with dry CO₂and HCI yields	A. Ester B. Alcohol C. Carboxylic acid D. Aldehyde
10	Ethyl bromide is formed by the reaction of HBr with	A. Ethane B. Ethene C. Ethyne D. Propane

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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

The chloroform reacts with NaOH to give

Alcohol can be prepared from Grignard's reagent with an aldehyde: If we start with formaldehyde the product alcohol with be

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

The order of reactivity for a given halogen in Grignard's reagent is:

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

Hydrolysis of Grignard's reagent gives:

Which responds to +ve iodoform test?

An electrophile may be

Ethyl chloride on treatment with aqueous alkali gives

Which halide among the following is used as methylating agent?

Alkyl halides on treatment with metallic Na give

Organic compounds containing halogen atom are called:

SN2reactions can be best carried out with:

When an alcohol reacts with SOCI2an alkyl halide is formed. What are two other products

Cyanoform is ________ acid in nature than the chloroform. The missing word is

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

The rate of E1reaction depends upon

Among the following the most reactive towards alcoholic KOH is

Which of the following compounds gives trichoromethane on distilling with bleaching power?

Alkyl halides react with Mg in dry ether to form

Which one of the following will have the maximum dipole moment

E2has molecularity :

Which bond is most stable

1, 3-Dibromopropane reacts with metallic zinc to form

Hydrolysis of Grignard's reagent yields

Any other aldehyde except formaldehyde on reaction with Grignard's will produce

Chlorobenzene on heating with aqueous NH3under pressure in the presence of cuprous chloride gives

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

Ethyl bromide is formed by the reaction of HBr with

What is the total number of different chloroethanes, formula C2H6-nCln, where n can be any integer from 1 to 4

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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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SN₂reactions can be best carried out with:

When an alcohol reacts with SOCI₂an alkyl halide is formed. What are two other products

The rate of E₁reaction depends upon

E₂has molecularity :

Chlorobenzene on heating with aqueous NH₃under pressure in the presence of cuprous chloride gives

What is the total number of different chloroethanes, formula C₂H_6-nCl_n, where n can be any integer from 1 to 4