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Test: Preparation and Properties of Monohalides - JEE MCQ


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20 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Preparation and Properties of Monohalides

Test: Preparation and Properties of Monohalides for JEE 2024 is part of Chemistry for JEE Main & Advanced preparation. The Test: Preparation and Properties of Monohalides questions and answers have been prepared according to the JEE exam syllabus.The Test: Preparation and Properties of Monohalides MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Preparation and Properties of Monohalides below.
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Test: Preparation and Properties of Monohalides - Question 1

Which of the following pairs of compounds are enantiomers?

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 1

Compound which are mirror image of each other and are non superimposable are termed as enantiomers.

These are enantiomers

Test: Preparation and Properties of Monohalides - Question 2

The correct order of SN2 E2 ration for the % yield of product of the following halide is

 

(R) CH3 — CH2 — I

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 2

The correct answer is Option A
Least hindered halides give the fastest SN2 reaction as the hindrance increases. As the hindrance increases, the occurrence of SN2 reaction decreases.

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Test: Preparation and Properties of Monohalides - Question 3

Among the following organic halides in the increasing order of their dehydrohalogenation reactions in the presence of alcoholic
(A) 
(B) 
(C) 
(D) 

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 3

The elimination reaction (dehydrohalogenation)
is favoured by those substrates that form a more stable carbocation intermediate.
Thus, the order of reactivity will be :-

Test: Preparation and Properties of Monohalides - Question 4
Which one of the following is more reactive towards reaction?
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 4
Bimolecular nucleophilic substitution reaction involves reaction between reactant and nucleophile simultaneously without the formation of carbocation. Less hindered species are more reactive towards reaction. As is least hindered alkyl halide, it will show more fast reaction towards reaction.
Test: Preparation and Properties of Monohalides - Question 5

Benzene reacts with -propyl chloride in the presence of anhydrous to give

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 5

Test: Preparation and Properties of Monohalides - Question 6
What is the product of the following reaction ?
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 6
Test: Preparation and Properties of Monohalides - Question 7
Identify and in the following reaction

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 7
Ethyl chloride can be converted into ethyl alcohol either by using aqueous alkali or by moist .

Test: Preparation and Properties of Monohalides - Question 8
Consider the reactions
(i)
(ii)
The mechanism of reactions (i) & (ii) are respectively
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 8
and
Since rearrangement do not occur in the given nucleophilic substitution reactions, therefore carbocations are not the intermediate in these reactions. Thus both the reactions occur by mechanism.
Test: Preparation and Properties of Monohalides - Question 9
How many stable alkenes on reaction with HCl will produce
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 9
Test: Preparation and Properties of Monohalides - Question 10
Number of ambidentate nucleophiles among the following
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 10
Test: Preparation and Properties of Monohalides - Question 11
Number of substrates which will show rearrangement is
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 11
By analyzing each substrate, we find that substrates (I), (II), (IV), (VI), (VII), (VIII), and (IX) can all undergo rearrangement. So number of substates is 6.
Test: Preparation and Properties of Monohalides - Question 12


How many structures for are possible?

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 12

Test: Preparation and Properties of Monohalides - Question 13
Which one of the following compounds most readily undrgoes substitution by mechanism?
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 13
The increasing order of the nucleophilic substitution by mechanism is tert
alkyl halide sec alkyl halide primary alkyl halide.
Compound B is primary alkyl halide.
Hence it most readily undergoes substitution by mechanism.
Note: compound is also primary alkyl halide but in it, the carbon attached to is more hindered.
Test: Preparation and Properties of Monohalides - Question 14
Which of the following is fast debrominated?
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 14
More the stabllity of tie product, faster is debromination of the parent compound.
Test: Preparation and Properties of Monohalides - Question 15

The organic compound (P) of the reaction:

is

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 15

We must know that the Haloalkane in the presence of alcoholic undergoes elimination reactions. For example:

Alcoholic potassium hydroxide, solution that functions as solvent gives alkoxide ions that act as a strong base. This base abstracts -Hydrogen atom from saturated substrate - alkyl halide.
Abstracted -Hydrogen atom is then transferred to the alkyl part to form an alkane and simultaneously a molecule of is eliminated.
The basicity of hydroxide ions is considerably lower than the basicity of alkoxide ions. Hydroxide ion is significantly getting hydrated in aqueous solution. Hence, hydroxide ions cannot abstract -hydrogen atoms of alkyl chloride to eliminate and form alkene.

Test: Preparation and Properties of Monohalides - Question 16
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 16
Test: Preparation and Properties of Monohalides - Question 17


Which statement is true for the above reaction?

Detailed Solution for Test: Preparation and Properties of Monohalides - Question 17

The correct option is B Inversion of configuration.

Here inversion of configuration occurs.

Test: Preparation and Properties of Monohalides - Question 18
On on heating diethyl ether with conc- HI, 2 moles of which of the following is formed
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 18
Firstly the HI given will get ionized:

The iodide ion produced will attack one of the Carbon-oxygen bonds, gets attached to carbon, the hydrogen ion produced in the first step will get attached to a negatively charged oxygen atom:

The ethanol produced in the above step still has a carbon-oxygen bond and we are provided with an excess of HI (concentrated), so the iodide ion will now attack the carbon-oxygen bond of ethanol similarly, and the hydrogen ion will get attached to hydroxide ion produced:

Thus, the overall reaction between diethyl ether and hot and concentrated HI will be:

Means, the given reaction will give two moles of ethyl iodide.
Test: Preparation and Properties of Monohalides - Question 19
Alkyl halide reacts with an alcoholic solution of ammonia to give a mixture of:
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 19
Acoholic solution of ammonia is heated in a sealed tube at 100
Test: Preparation and Properties of Monohalides - Question 20
Product-I Product-II The correct statement is
Detailed Solution for Test: Preparation and Properties of Monohalides - Question 20
(Product-I)
(Nucleophilic substitution reaction)
(Product-II)
(elimination reaction)
(Product-I) isomer is
denydration
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