The word Alkali means__________________?
Correct answer: C. Ashes
- A. Base
- B. Basic salt
- C. Ashes
- D. Spirit
Explanation
The term alkali comes from an Arabic word referring to the ashes of plants, from which alkaline substances such as carbonates were historically obtained. The word later became associated with soluble bases, but its original meaning is ashes. Students may choose base because alkalis are soluble bases, but that is the later chemical meaning rather than the word's origin.
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About Reactions of Group I Elements
Group I elements have one valence electron, so their reactivity increases down the group as ionisation energy decreases. Their reactions with water, oxygen, hydrogen and halogens produce hydroxides, oxides, hydrides and halides, while the behaviour of lithium differs from the heavier metals because of its small ionic size.
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