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.

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
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   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
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   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
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   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.

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