Formula of Chile saltpetre is__________________?
Correct answer: A. NaNO3
- A. NaNO3
- B. CaCO3
- C. Ba (NO3)2
- D. NH4Cl
Explanation
Chile saltpetre is the mineral name for sodium nitrate, NaNO3, a naturally occurring nitrate deposit from Chile. Calcium carbonate is limestone, barium nitrate is a different nitrate salt, and ammonium chloride is sal ammoniac. Students may select a by recognizing the nitrate group but forgetting that Chile saltpetre specifically means sodium nitrate.
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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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