WAEC Chemistry 2025 Theory — Question 48

Question 48 of 70 from the West African Examinations Council (WAEC) Chemistry 2025 Theory paper, with the correct answer and a full explanation.

4(d)(iii). State one industrial use of hydrogen chloride gas.

Model answer

Used in the synthesis of chloroethane; used in removing rust/scales from metals (pickling); used in the tanning industry to convert animal hides/skins into leather.

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