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Science · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 1 · Q20
Consider the structures 'X' and 'Y' given below: and Which of the following statements are correct? (i) 'X' and 'Y' are homologues. (ii) 'X' and 'Y'…
Consider the structures 'X' and 'Y' given below :
and 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.
Official answer
(D)
(iii) and (iv)
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CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.