Correct Answer: Ammonium hydroxide - Cleaning agents
Subject: chemistry
Explanation: • <b>Key Fact</b> Ammonium hydroxide (NH₄OH) is specifically used in cleaning agents and fertilizers. • <b>Supporting Detail</b> Magnesium hydroxide acts as an antacid, neutralizing stomach acid. • <b>Related Concept</b> Calcium hydroxide is slaked lime, used for whitewashing walls. • <b>Why wrong options are wrong</b> Sodium and Potassium hydroxides are used in soap/battery manufacturing, not whitewashing. • <b>Exam Trick</b> NH₄OH is a weak base, making it safe for household window cleaners. • <b>Additional Info</b> A base that is soluble in water is called an alkali.
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