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Science · 2025 · 2 marks
CBSE 2025 · Region 2 · Set 1 · Q22
(a) Select from the following the members of same homologous series: (1) (2) (3) (4) (b) What happens to (i) the melting point, and (ii) the…
(a)
Select from the following the members of same homologous series :
(1)
(2)
(3)
(4)
(b)
What happens to (i) the melting point, and (ii) the solubility of compounds as the molecular mass of the compounds in a homologous series increases?
Marking-scheme solution
(a)(1)
and
(b)(i)
melting point increases with increasing molecular mass.
(ii)
Solubility shows regular gradation/ decreases with increase in molecular mass.
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.