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Consider the following reactions : NaCl + K2Cr2O7 + H2SO4 → (A) + side products (Conc.) (A) + NaOH → (B) + side products (B) + H2SO4 + H2O2 → (C) + Side products (dilute) The sum of the total number of atoms in one molecule each of (A), (B) and (C) is __________.

1. 15
2. 18
3. 20
4. 22

Correct answer: 18

Solution

The correct option is 18 because the molecular formulas of compounds A, B, and C contain a total of 18 atoms when combined, reflecting the stoichiometry of the reactions and the elements involved.

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