RRB Group D (Level-1 posts) 2022 · Question 61 of 598
In a homologous series, each consecutive member differs by a -CH2 group, which has a molecular mass of 14 (12 from carbon and 2 from hydrogen).
Source: RRB Group D 2022 Prev. Yr. Paper (17 Aug 2022) (Shift 1) - FreshersNow · reliable-secondary
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