_______ hydroxide is also known as 'Caustic Potash'.
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Calcium
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Magnesium
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Potassium
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Sodium
C
Correct answer
Explanation
Potassium hydroxide (KOH) is commonly known as 'Caustic Potash', just as sodium hydroxide (NaOH) is called 'Caustic Soda'. Both are strong alkalis used in various industrial applications. Calcium hydroxide is slaked lime, magnesium hydroxide is milk of magnesia.