See image — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Concept: Double Bond Equivalents (DBE), also called Degree of Unsaturation (DoU), is calculated using the formula: DBE = (2C + 2 + N - H - X) / 2, where oxygen (and sulfur) are not counted in the formula. Step 1: Identify the molecular formula components. C = 6, H = 12, O = 6, N = 0, X (halogens) = 0. Step 2: Apply the DBE formula (oxygen is ignored). DBE = (2×6 + 2 - 12) / 2 DBE = (12 + 2 - 12) / 2 DBE = 2 / 2 DBE = 1 Step 3: Interpret the result. A DBE of 1 means the compound has one degree of unsaturation — this could be one double bond (C=O, C=C) or one ring. A classic example of C6H12O6 is glucose, which exists predominantly as a cyclic hemiacetal (one ring, contributing 1 DBE), consistent with this result. Why other options fail: - (a) 0: Would require the formula to be fully saturated with no rings or double bonds; the formula gives DBE = 1, not 0. - (c) 2: Would require DBE = 2; the calculation yields only 1. - (d) 3: Would require DBE = 3; the calculation yields only 1. Therefore, the correct answer is B.