Organic Chemistry - Some Basic Principles and Techniques Quiz - CBSE Class 11 Science

Free practice quiz: Organic Chemistry - Some Basic Principles and Techniques (CBSE Class 11 Science). 17 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Science practice quiz has 17 multiple-choice questions on Organic Chemistry - Some Basic Principles and Techniques, and 17 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is NOT a characteristic of organic compounds?

   1. Generally contain carbon
   2. Usually flammable
   3. High melting and boiling points
   4. Covalent bonding
   Show answer

   Answer: C. High melting and boiling points

   Organic compounds typically have lower melting and boiling points compared to inorganic compounds due to weaker intermolecular forces.

2. Which technique is used to purify solids by repeated crystallization?

   1. Distillation
   2. Sublimation
   3. Recrystallization
   4. Chromatography
   Show answer

   Answer: C. Recrystallization

   Recrystallization involves dissolving the solid in a hot solvent, then cooling it to allow pure crystals to form.

3. What is the role of a dehydrating agent in organic reactions?

   1. To add water
   2. To remove water
   3. To add hydrogen
   4. To remove hydrogen
   Show answer

   Answer: B. To remove water

   Dehydrating agents, such as concentrated sulfuric acid, remove water molecules from reactants.

4. Explain the concept of electromeric effect.

   1. Shift of electrons in a covalent bond due to the presence of an electronegative atom
   2. Delocalization of electrons in a conjugated system
   3. Temporary shift of a shared electron pair under the influence of a reagent
   4. Permanent polarization of a covalent bond
   Show answer

   Answer: C. Temporary shift of a shared electron pair under the influence of a reagent

   The electromeric effect is a temporary displacement of electrons in a multiple bond caused by the approach of an attacking reagent.

5. Discuss the factors affecting the rate of SN1 and SN2 reactions.

   1. Substrate structure, leaving group, nucleophile, solvent
   2. Only substrate structure and leaving group
   3. Only nucleophile and solvent
   4. Only substrate structure
   Show answer

   Answer: A. Substrate structure, leaving group, nucleophile, solvent

   The rate of SN1 and SN2 reactions are influenced by various factors such as substrate structure, the nature of the leaving group, the nucleophile, and the solvent.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the general formula for alkanes?
2. What is the IUPAC name for CH₃CH₂CH₃?
3. What is the process of separating volatile liquids based on their boiling points?
4. What type of isomerism is exhibited by compounds with the same molecular formula but different structural formulas?
5. Which chromatographic technique is best suited for separating colored compounds?
6. Define the term 'homologous series' in organic chemistry.
7. What is the difference between inductive and resonance effect?
8. How does the presence of a chiral carbon atom affect the properties of a molecule?
9. Explain the difference between SN1 and SN2 reactions.
10. Explain the mechanism of electrophilic aromatic substitution.
11. Explain the concept of hyperconjugation and its effect on stability.
12. Describe the different types of isomerism found in organic compounds and provide examples for each.

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