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प्रश्न
Which of the following is not an alkali?
विकल्प
Ca(OH)2
KОН
NH4OH
Cu(OH)2
MCQ
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उत्तर
Cu(OH)2
Explanation:
Alkalis are specifically water-soluble bases. Copper hydroxide [Cu(OH)2] is completely insoluble in water, which means it is a base but cannot be called an alkali.
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