Which of the following is necessary for the bromination of phenol?
CS₂ correct as per chemistry principle.
Ref: NCERT Chemistry Class XII — Organic Chemistry
#organic reaction
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A primary amine on treatment with carbon disulphide and HgCI₂ produces black ppt and
alkyl isothiocyanate correct as per chemistry principle.
Ref: NCERT Chemistry Class XI and XII
Hofmann bromamide degradation reaction is shown by _______
ArCONH₂ correct as per chemistry principle.
Ref: NCERT Chemistry Class XI and XII
Phenol on treatment with diethyl sulphate in presence of NaOH gives
phenetole correct as per chemistry principle.
Ref: NCERT Chemistry Class XII — Electrochemistry
In the reaction, 2A + dry silver oxide → ether + 2 AgX, A is a/an
alkyl halide correct as per chemistry principle.
Ref: NCERT Chemistry Class XII — Organic Chemistry
How many carbon atoms are in the product of CH₃CH₂NH₂ with CH₃COCl?
Ethylamine (CH₃CH₂NH₂, 2C) reacts with acetyl chloride (CH₃COCl, 2C) to form N-ethylacetamide (CH₃CONHCH₂CH₃, 4C), as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Physical Properties, Basic Character and Solubility
Which reaction of CH₃NH₂ produces a compound with a characteristic foul odor?
The carbylamine reaction of CH₃NH₂ with CHCl₃ and KOH forms methyl isocyanide (CH₃NC), known for its foul odor, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Nomenclature, Structure and Preparation - Ammonolysis and Gabriel Synthesis
The product of CH₃CH₂NH₂ reacting with CHCl₃ and alcoholic KOH is:
Ethylamine (CH₃CH₂NH₂) forms ethyl isocyanide (CH₃CH₂NC) in the carbylamine reaction, as per the PDF’s chemical properties.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Nomenclature, Structure and Preparation - Ammonolysis and Gabriel Synthesis
The product of CH₃CH₂CH₂NH₂ with CHCl₃ and alcoholic KOH is:
Propan-1-amine (CH₃CH₂CH₂NH₂) forms propyl isocyanide (CH₃CH₂CH₂NC) in the carbylamine reaction, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Nomenclature, Structure and Preparation - Ammonolysis and Gabriel Synthesis
The product of C₆H₅NH₂ reacting with CH₃COCl is:
Aniline (C₆H₅NH₂) reacts with acetyl chloride (CH₃COCl) to form acetanilide (C₆H₅NHCOCH₃), as per the PDF’s acetylation.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Nomenclature, Structure and Preparation - Ammonolysis and Gabriel Synthesis
What is the product when acetone is heated with calcium acetate?
Heating calcium acetate ((CH₃COO)₂Ca) decarboxylates it to acetone (CH₃COCH₃), so acetone remains unchanged in this context, but the reaction confirms its formation.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Reactions due to α-Hydrogen - Aldol, Cannizzaro and Acidity of Carboxylic Acids
Which species is most likely to act as a nucleophile in the conversion of CH₃CH₂Br to CH₃CH₂CN?
CN⁻ (cyanide ion) is a strong nucleophile that displaces Br⁻ in a substitution reaction to form CH₃CH₂CN (propanenitrile).
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Stereoisomerism - Geometrical and Optical Isomerism
