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ICSE Class 10 Chemistry Question 23 of 23

Solved 2025 Specimen Paper ICSE Class 10 Chemistry — Question 23

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Question

Question 8(iv)

The structures of six organic compounds are shown:

The structures of six organic compounds are shown: ICSE 2025 Chemistry Solved Question Paper.

(a) Identify two of the compounds that are members of the same homologous series but are not isomers.

(b) Which two compounds are isomers of each other?

(c) F can be prepared from D. Give a chemical equation for the reaction.

Answer

(a) A and F

(b) C and E

(c) C2H5OH →170°CConc. H2SO4\xrightarrow[170\degree\text{C}]{\text{Conc. H}_2\text{SO}_4} C2H4 ↑ + H2O

Reason

(a) Butene (C4H8) and Ethene (C2H4) are members of homologous series of alkenes and are not isomers.

(b) Both C and E have the same molecular formula (C4H10) but different structure. C is n-butane and E is iso-butane.

(c) Ethene (C2H4) can be prepared by the dehydration of ethyl alcohol (C2H5OH).