Chemistrymedium · Past Paper
Which of the following is not a property of an alkali?
AIt turns red litmus blue
BIt has a bitter taste
CIt reacts with acids to form salt and water
DIt reacts with metals to form hydrogen gas only if they are acidic
✓ Correct Answer: D — It reacts with metals to form hydrogen gas only if they are acidic
Alkalis react with certain amphoteric metals (like Zn, Al) to form hydrogen, but the phrasing 'only if they are acidic' is incorrect contextually.
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