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  1. Problems
  2. /Organic Chemistry: Some Basic Principles and Techniques

Organic Chemistry: Some Basic Principles and Techniques

Chemistry

IUPAC names, isomerism, electronic effects, reaction intermediates, and purifying and analysing organic compounds.

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38 problems
Exam:
Type:
1.
A compound has 54.5 % carbon, 9.1 % hydrogen and 36.4 % oxygen… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IB, NEETStemPy LabStemPy Lab
Hard
2.
A 0.185 g sample of an organic compound is heated in a Carius tube with fuming nitric acid and… New
High School (11–12) · Purification and Analysis of Organic CompoundsStemPy LabStemPy Lab
Medium
3.
The ammonia from 0.45 g of a compound is passed into 40 mL of 0.10 mol/L sulphuric acid… New
High School (11–12) · Purification and Analysis of Organic CompoundsStemPy LabStemPy Lab
Hard
4.
In a Dumas determination, 0.28 g of a compound gives 43 mL of nitrogen… New
High School (11–12) · Purification and Analysis of Organic CompoundsStemPy LabStemPy Lab
Hard
5.
A 0.40 g sample of an organic compound is burnt completely… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IB, NEETStemPy LabStemPy Lab
Medium
6.
A 0.175 g sample of a compound holds 16 % nitrogen by mass… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IB, NEETStemPy LabStemPy Lab
Hard
7.
A student adds silver nitrate straight to the sodium fusion extract of a compound that has both… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IB, NEETStemPy LabStemPy Lab
Medium
8.
Two compounds are fused with sodium, and the extract is tested… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IB, NEETStemPy LabStemPy Lab
Medium
9.
Aniline, M = 93 g/mol, is steam distilled… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IB, NEETStemPy LabStemPy Lab
Hard
10.
On a TLC plate the solvent front rose 7.5 cm above the starting line… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IB, NEETStemPy LabStemPy Lab
Medium
11.
Name the best method of purification for each case, and give the reason… New
High School (11–12) · Purification and Analysis of Organic CompoundsA-Level, IBStemPy LabStemPy Lab
Easy
12.
Propene, CH₃CH=CH₂, reacts with bromine to give 1,2-dibromopropane, CH₃CHBrCH₂Br… New
High School (11–12) · Electronic Effects and Reaction IntermediatesStemPy LabStemPy Lab
Medium
13.
Name the type of each reaction, and give the evidence… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IB, JEE MainStemPy LabStemPy Lab
Medium
14.
Say whether each species is a nucleophile or an electrophile, and give a reason… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IBStemPy LabStemPy Lab
Easy
15.
Phenol, C₆H₅OH, is a much stronger acid than ethanol, CH₃CH₂OH… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IB, JEE MainStemPy LabStemPy Lab
Hard
16.
In the nitrate ion, NO₃⁻, the nitrogen atom is joined to three oxygen atoms… New
High School (11–12) · Electronic Effects and Reaction IntermediatesStemPy LabStemPy Lab
Medium
17.
Use a simple model. Each bond of a carbon chain passes on 0.4 of the electron pull it receives… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IB, JEE MainStemPy LabStemPy Lab
Medium
18.
Arrange these acids in order of increasing strength: CH₃COOH, Cl₃CCOOH, ClCH₂COOH and Cl₂CHCOOH… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IB, JEE MainStemPy LabStemPy Lab
Medium
19.
The 3-methylbutan-2-yl cation, (CH₃)₂CH-CH⁺-CH₃, is a secondary carbocation… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IB, JEE MainStemPy LabStemPy Lab
Hard
20.
Find the number of C-H bonds on the carbon atoms next to the positive carbon, in each of these… New
High School (11–12) · Electronic Effects and Reaction IntermediatesStemPy LabStemPy Lab
Medium
21.
Arrange these free radicals from the most stable to the least stable: CH₃ᵇᵘˡˡᵉᵗ, (CH₃)₃Cᵇᵘˡˡᵉᵗ… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IB, JEE MainStemPy LabStemPy Lab
Medium
22.
Three bonds break as shown below. For each, say whether the fission is homolytic or heterolytic… New
High School (11–12) · Electronic Effects and Reaction IntermediatesA-Level, IBStemPy LabStemPy Lab
Easy
23.
For each compound, say whether it has cis and trans forms, a pair of enantiomers, or neither: (a)… New
High School (11–12) · Classification, IUPAC Nomenclature and IsomerismA-Level, IBStemPy LabStemPy Lab
Medium
24.
A hydrocarbon has the formula C₄H₈. Find its degrees of unsaturation… New
High School (11–12) · Classification, IUPAC Nomenclature and IsomerismStemPy LabStemPy Lab
Hard
25.
Name the kind of isomerism between each pair: (a) butan-1-ol and butan-2-ol; (b) butan-1-ol and… New
High School (11–12) · Classification, IUPAC Nomenclature and IsomerismA-Level, IBStemPy LabStemPy Lab
Medium
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