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question_answer1)
Direction (1-14): In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
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Assertion: Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols.
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Reason: Thionyl chloride give pure alkyl halides.
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A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer2)
Assertion: The boiling points of alkyl halides decrease in the order : \[RI\text{ }>\text{ }RBr\text{ }>\text{ }RCl\text{ }>\text{ }RF\]. |
Reason: The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer3)
Assertion: KCN reacts with methyl chloride to give methyl isocyanide |
Reason: \[C{{N}^{-}}\] is an ambident nucleophile. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer4)
Assertion: tert-Butyl bromide undergoes Wurtz reaction to give 2, 2, 3, 3-tetramethylbutane. |
Reason: In Wurtz reaction, alkyi halides react with sodium in dry ether to give hydrocarbon containing double the number of carbon atoms present in the halide. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer5)
Assertion: Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution. |
Reason: Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer6)
Assertion: In monohaloarenes, further electrophilic substitution occurs at ortho and para positions. |
Reason: Halogen atom is a ring deactivator. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer7)
Assertion: Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent. |
Reason: Oxidising agent oxidises \[{{I}_{2}}\] into HI. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer8)
Assertion: It is difficult to replace chlorine by -OH in chlorobenzene in comparison to that in chloroethane. |
Reason: Chlorine-carbon (C-Cl) bond in chlorobenzene has a partial double bond character due to resonance. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer9)
Assertion: Hydrolysis of (-) -2- bromooctane proceeds with inversion of configuration. |
Reason: This reaction proceeds through the formation of a carbocation. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer10)
Assertion: Nitration of benzene leads to the formation of m-nitro benzene. |
Reason: - \[N{{O}_{2}}\] group is a m-directing group. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer11)
Assertion: In monohaloarenes, further electrophilic substitution occurs at ortho and para positions. |
Reason: Halogen atom is a ring deactivator. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer12)
Assertion: But-1-ene on reaction with HBr in the presence of peroxide produces 1-bromobutane. |
Reason: It involves the formation of a primary free radical. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer13)
Assertion: \[C{{H}_{3}}CHClC{{H}_{2}}C{{H}_{3}}\xrightarrow[Acetone]{Nal\,in}\]A |
A is a racemic mixture. |
Reason: The reaction involves Walden Inversion and the product is a mixture of dextro and laevo isomers. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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question_answer14)
Assertion: Aryl halides undergo nucleophilic substitution reactions with ease. |
Reason: The carbon halogen bond in aryl halides has partial double bond character. |
A)
Assertion and reason both are correct and reason is correct explanation of assertion. done
clear
B)
Assertion and reason both are correct statements but reason is not correct explanation for assertion. done
clear
C)
Assertion is correct but reason is wrong statement. done
clear
D)
Assertion is wrong but reason is correct statement. done
clear
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