When the nitrates of Na,Li,Ca and Sr were heated strongly in separate containers, all of them gave reddish brown colour except the nitrate of:
Correct answer: D. Li
- A. Na
- B. Ca
- C. Sr
- D. Li
Explanation
LiNO₃ → gives Li₂O + NO₂ (brown gas) + O₂.ng.
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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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