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Science (English Medium) इयत्ता १२ - CBSE Important Questions for Chemistry

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Chemistry
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Convert the following:

Chloroethane to methanamine.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Polyhalogen Compounds

Which one of the following compounds is more reactive towards SN1 reaction?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Give reason for the following:

During the electrophilic substitution reaction of haloarenes, para-substituted derivative is the major product.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Electrophilic Substitution Reactions

Give reason for the following:

The product formed during SN1 reaction is a racemic mixture.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Out of the Chloromethane and Fluoromethane, which one is has higher dipole moment and why?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Introduction to Haloalkanes and Haloarenes >> Nature of C-X Bond

Identify the major product formed when 2-cyclohexylchloroethane undergoes a dehydrohalogenation reaction. Name the reagent which is used to carry out the reaction.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Elimination Reactions

Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes and vinylic halides?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Classification of Haloalkanes and Haloarenes

Give reasons for the following statement:

Copper does not displace hydrogen from acids.

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Electrochemical Principles of Metallurgy

In which reaction mechanism carbocation is formed?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

The conversion of an alkyl halide into an alkene by alcoholic KOH is classified as ______.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Elimination Reactions

Racemisation occurs in ______.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Assertion (A) : Nucleophilic substitution of iodoethane is easier than chloroethane.

Reason (R) : Bond enthalpy of C-I bond is less than that of C-Cl bond.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Which of the following belongs to the class of vinyl halides?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Classification of Haloalkanes and Haloarenes

Retention of configuration is observed in ______.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Assertion (A): Chlorobenzene is resistant to electrophilic substitution reaction.

Reason (R): C-Cl bond in chlorobenzene acquires partial double bond characters due to resonance.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Electrophilic Substitution Reactions

Inversion of configuration occurs in ______.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Assertion: Chlorobenzene is resistant to nucleophilic substitution reaction at room temperature.

Reason (R): C–Cl bond gets weaker due, to resonance.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Nucleophilic Substitution

Why is the boiling point of o-dichlorobenzene higher than p-dichlorobenzene, but the melting point of para-isomer is higher than ortho-isomer?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Physical Properties of Haloalkanes and Haloarenes

Write the equation for the following:

Oxidation of chloroform by air and light.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Polyhalogen Compounds

Why haloarenes are not reactive towards nucleophilic substitution reaction? Give two reactions.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Nucleophilic Substitution
< prev  1141 to 1160 of 1512  next > 
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CBSE Science (English Medium) इयत्ता १२ Important Questions
Important Questions for CBSE Science (English Medium) इयत्ता १२ Biology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Chemistry
Important Questions for CBSE Science (English Medium) इयत्ता १२ Computer Science (C++)
Important Questions for CBSE Science (English Medium) इयत्ता १२ Computer Science (Python)
Important Questions for CBSE Science (English Medium) इयत्ता १२ English Core
Important Questions for CBSE Science (English Medium) इयत्ता १२ English Elective - NCERT
Important Questions for CBSE Science (English Medium) इयत्ता १२ Entrepreneurship
Important Questions for CBSE Science (English Medium) इयत्ता १२ Geography
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Core)
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Elective)
Important Questions for CBSE Science (English Medium) इयत्ता १२ History
Important Questions for CBSE Science (English Medium) इयत्ता १२ Informatics Practices
Important Questions for CBSE Science (English Medium) इयत्ता १२ Mathematics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physical Education
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Political Science
Important Questions for CBSE Science (English Medium) इयत्ता १२ Psychology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Sociology
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