ECAT Pre Engineering Chemistry Chapter 21 MCQ Test With Answer

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

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Mehreen Ather 19 - Dec - 2024 07 Min 45 Sec 85/120
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GOVT. SUFFA EDUCATION CENTER GIRLS MURIDKE 01 - Jun - 2024 08 Min 45 Sec 85/120
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Huzaifa Asim 30 - May - 2024 06 Min 34 Sec 60/120
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Nauman Iqbal 12 - Apr - 2024 13 Min 49 Sec 60/120
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Namers studio 13 - May - 2024 07 Min 23 Sec 55/120
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Rabbia Munir 10 - Mar - 2024 07 Min 28 Sec 55/120
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Tamshi Sohail 04 - May - 2024 08 Min 28 Sec 55/120
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Gulfam Ahmad 06 - May - 2024 09 Min 34 Sec 55/120
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Zoya Zoya 27 - May - 2024 18 Min 52 Sec 55/120
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Rana waqar 02 - Jun - 2024 09 Min 52 Sec 50/120
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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	The order of reactivity of an alkyl halide (R-X) for a particular alkyl group is	A. Iodide > bromide > chloride B. Chloride > bromide > iodide C. Bromide > chloride > iodide D. Bromide > iodide > chloride
2	Reation of which with Grignard's reagent gives primary alcohol:	A. Formaldehyde B. Aldehyde C. Ketones D. Acetone
3	To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H₂SO₄	A. Trichloroethane B. Dichloroacetone C. Dichloroacetaldehyde D. Trichloroacetealdehyde
4	When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is	A. Propane B. Propanoic acid C. Propanal D. Propanol
5	Grignard's reagent was prepared in:	A. 1900 B. 1910 C. 1920 D. 1930
6	Dehydrohalogenation of alkyl halides give	A. Alkanes B. Alkenes C. Alkynes D. Alkdehyde
7	How many monochlorobutanes will be possible on chlorination of n-butane?	A. 1 B. 2 C. 3 D. 5
8	When metallic sodium in ether is heated with ethyl chloride, which alkane is formed	A. Propane B. Ethane C. Iso-butane D. N-butane
9		A. Primary alkyl halide B. Secondary alkyl halide C. Tertiary alkyl halide D. None of these
10		A. Electronphilic substitution B. Electrophilic addition C. Free radical substitution D. Nuclephilic substitution

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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

Reaction of ethylamine with chloroform in alcoholic KOH produces

Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of

Catalyst in the reaction ROH + SOCl2-------> RCL+SO2+HCl is:

C6H6Cl6can be obtained from

Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated

The reactivity order of alkyl halides for a paricular alkyl group is

What is the total number of different chloroethanes of formula C2H6-nClnpossible (n may be 1 to 6)

Elimination bimolecular reactions involve:

Which of the following is a nucleophile

Grignard's reagent on treatment with dry CO2and HCI yields

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

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

General formula of alkyl halide is:

Which is a weak nucleophile

SN1 reaction of alkylhalides leads to

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

Thre rate of SN2 reaction depends upon the

Allyl chloride on dehydrochlorination gives

Alkyl halides on treatment with metallic Na give

Alkyl halides react with Mg in dry ether to form

Reaction of Griganard's reagent with CO2gives:

Alkyle magnesium halides are known as

On warming with silver powder,chloroform is converted into

Tetrabromoethane on treatment with alcoholic zinc gives

which one of the following is not a nucleophile?

The alkyl halide is converted into an alcohol by

In which of the following reactions is the inorganic reagent acting as a nucleophile

Carbon atom holding halogen in aryl halides is

Benzene hexachloride is used as

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

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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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Tertiary alkyl halides are practically inert to substitution by S_N2 mechanism because of

Catalyst in the reaction ROH + SOCl₂-------> RCL+SO₂+HCl is:

C₆H₆Cl₆can be obtained from

What is the total number of different chloroethanes of formula C₂H_6-nCl_npossible (n may be 1 to 6)

Grignard's reagent on treatment with dry CO₂and HCI yields

S_N1 reaction of alkylhalides leads to

Thre rate of S_N2 reaction depends upon the

Reaction of Griganard's reagent with CO₂gives: