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	Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to	A. The formation of less stable carbonium ion B. Resonance stabilization C. Larger carbon-halogen bond D. The inductive effect
2	Ethyl alcohol gives ethyl chloride with the help of	A. SOCl₂ B. NaCl C. Cl₂ D. KCl
3	Ethyl bromide is formed by the reaction of HBr with	A. Ethane B. Ethene C. Ethyne D. Propane
4	Halogens on treating with silver salts of acids give	A. Alcohol B. Ester C. Phenol D. Alkyl halide
5	Cyanoform is ________ acid in nature than the chloroform. The missing word is	A. Stronger B. Weaker C. Amphoteric D. Neutral
6	Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?	A. HCl + anhyd. Zncl₂ B. NaCl C. PCl₅ D. SOCl₂
7	Replacement of Cl of Chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because	A. NO₂makes the electron rich ring at ortho and para positions B. NO₂withdraws electrons at metaposition C. NO₂donate electrons at m-position D. NO₂withdraws electrons at ortho and para position
8	1-Chlorobutane on reaction with alcoholic potash gives	A. But 1-ene B. Butan-1-ol C. But-2-ene D. Butan-2-ol
9	The reactivity order of alkyl halides for a particular alkyl group is:	A. F >Cl>Br>I B. Cl>Br>F>l C. l>Br>Cl>F D. Br>l>Cl>F
10	When primary amine reacts with chloroform in ethanolic KOH, then the product is	A. An isocyanide B. An aldehyde C. A cyanide D. An alcohol

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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 order of reactivity of an alkyl halide (R-X) for a particular alkyl group is

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

For the carbylamine reaction we need hot alc.KOH and

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

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

The general formula of alkyl halides is

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

Which one of the following will have the maximum dipole moment

Among the following the most reactive towards alcoholic KOH is

Grignard reagent is not prepared in aqueous medium but prepared in ether medium because

Which one of the following is not a nucleophile

Ethyl alcohol gives ethyl chloride with the help of

Which bond is most stable

Grignad reagent is reactive due to

Which is a good nucleophile?

Grignard's reagent on treatment with carbonyl compounds yield

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

Reactivity of alkyl halides with magnisium is of the order:

Grignard's reagent on treatment with dry CO2and HCI yields

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

Dehydrohalogenation of alkyl halides give

E1mechanism is generally shown by

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

Which reaction is example of nucleophilic substitution

On warming with silver powder,chloroform is converted into

Reation of which with Grignard's reagent gives primary alcohol:

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF2Cl.

When CO2 is made to react with ethyl megnesium iodine, followed by hydrolysis, the product formed is:

1, 3-Dibromopropane reacts with metallic zinc to form

The most reactive compound for electrophilic nitration will be

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

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

Grignard's reagent on treatment with dry CO₂and HCI yields

E₁mechanism is generally shown by

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

When CO₂is made to react with ethyl megnesium iodine, followed by hydrolysis, the product formed is: