Q50.Consider the following reactions A (i)CH3MBr B 573KCu 2 −methyl −2 −butene . The mass percentage of (ii)H3O+ carbon in A is _____________.
What This Question Tests
This question requires identifying the starting reactant 'A' by working backward through a two-step organic synthesis involving Grignard reaction and alcohol dehydration, then calculating the mass percentage of carbon in 'A'.
Concepts Tested
Formulas Used
Mass percentage = (Mass of element / Molar mass of compound) * 100
📚 NCERT Sections This Tests
7.7 — Predict The Major Product Of Acid Catalysed Dehydration Of
Chemistry Class 12 · Chapter 7
7.7 Predict the major product of acid catalysed dehydration of (i) 1-methylcyclohexanol and (ii) butan-1-ol
7.21 — Name The Reagents Used In The Following Reactions:
Chemistry Class 12 · Chapter 7
7.21 Name the reagents used in the following reactions: (i) Oxidation of a primary alcohol to carboxylic acid. (ii) Oxidation of a primary alcohol to aldehyde. (iii) Bromination of phenol to 2,4,6-tribromophenol. (iv) Benzyl alcohol to benzoic acid. (v) Dehydration of propan-2-ol to propene. (vi) Butan-2-one to butan-2-ol.
7.20 — How Are The Following Conversions Carried Out?
Chemistry Class 12 · Chapter 7
7.20 How are the following conversions carried out? (i) Propene ® Propan-2-ol. (ii) Benzyl chloride ® Benzyl alcohol. (iii) Ethyl magnesium chloride ® Propan-1-ol. (iv) Methyl magnesium bromide ® 2-Methylpropan-2-ol.
📋 Question Details
- Chapter
- Aldehydes Ketones Carboxylic Acids
- Topic
- Grignard reaction, Dehydration of alcohols, Alkene synthesis
- Year
- 2020
- Shift
- 09 Jan Shift 2
- Q Number
- Q50
- Type
- Numerical
- NCERT Ref
- Class 12 Chemistry Ch 12: Aldehydes Ketones Carboxylic Acids; Class 12 Chemistry Ch 11: Alcohols Phenols Ethers
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