Alkanes Quiz - CBSE Class 12 Chemistry

Free practice quiz: Alkanes (CBSE Class 12 Chemistry). 18 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 12 Chemistry practice quiz has 18 multiple-choice questions on Alkanes, and 18 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 an example of an alkane?

   1. C2H4
   2. C3H6
   3. C4H10
   4. C2H2
   Show answer

   Answer: C. C4H10

   Alkanes are saturated hydrocarbons with single bonds only. C4H10, or butane, is an example of an alkane.

2. What is the boiling point trend of alkanes as the number of carbons increases?

   1. Decreases
   2. Increases
   3. Remains constant
   4. Fluctuates
   Show answer

   Answer: B. Increases

   As the number of carbon atoms in alkanes increases, the boiling point also increases due to greater van der Waals forces.

3. What is the significance of isomerism in alkanes?

   1. Same molecular formula, different structural formula
   2. Different molecular formula
   3. Identical structures
   4. No significance
   Show answer

   Answer: A. Same molecular formula, different structural formula

   Isomerism in alkanes means different compounds can have the same molecular formula but different structural arrangements.

4. Which alkane is known for being used as a refrigerant?

   1. Butane
   2. Propane
   3. Hexane
   4. Isobutane
   Show answer

   Answer: D. Isobutane

   Isobutane is commonly used as a refrigerant due to its thermodynamic properties.

5. Which of the following reactions can alkanes undergo?

   1. Addition reactions
   2. Substitution reactions
   3. Elimination reactions
   4. Oxidation reactions
   Show answer

   Answer: B. Substitution reactions

   Alkanes primarily undergo substitution reactions, especially when reacting with halogens in the presence of UV light.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What type of bond connects the carbon atoms in alkanes?
2. What is the IUPAC name of CH3-CH2-CH2-CH3?
3. Which of the following alkanes has the highest boiling point?
4. What product is primarily obtained by the complete combustion of an alkane?
5. Why do alkanes have low reactivity compared to other organic compounds?
6. Which process leads to the conversion of alkanes to alkenes?
7. What is a major use of alkanes in everyday life?
8. How does the presence of branching in an alkanes affect its boiling point?
9. What carbon chain configuration is present in n-pentane?
10. What is the general formula for linear alkanes?
11. What is the role of alkanes in the petroleum industry?
12. What type of structural isomerism do alkanes show?
13. Which of the following compounds is not an alkane?

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