Structural isomers
This type of question, asked 3 times: 2023, 2025, 2026. All 5 questions below, oldest first.
Try each one first, then open its answer.
Question 1
2023
36 (a)(i) Butane had both Carbon – Carbon bonds as well as Carbon – Hydrogen bonds. Draw its structural formula and state the number of (1) C – H bonds and (2) C – C bonds in it. (ii) You have two carbon compounds with the molecular formula . Name two compounds with this formula and also draw their structural formula.Question 2
2023
34 (a)(i) What are isomers ? Write the structures of two compounds having molecular formula and give their names. (ii) What are soaps ? How are they chemically different from detergents ? Why do soaps not work effectively in hard water ?Question 3
2025
Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.17Assertion (A) : Propanal and propanone are structural isomers. Reason (R) : Propanal and propanone both have the same molecular formula.Tap an option to check your answer.
Question 4
2025
4Given below are the structures of some hydrocarbons. Select the two structures which are related to each other from the given options :Tap an option to check your answer.
Question 5
2026
20Consider the structures ‘X’ and ‘Y’ given below : Which of the following statements are correct ? (i) ‘X’ and ‘Y’ are homologues. (ii) ‘X’ and ‘Y’ have the same structural formula, but different molecular formula. (iii) ‘X’ and ‘Y’ have the same molecular formula, but different structural formula. (iv) ‘X’ and ‘Y’ are structural isomers.Tap an option to check your answer.