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Per NCERT §3.7.3, oxides of elements show what acid–base trend across a period?
AAlways basic
BNo periodic trend
CAlways acidic
DMost BASIC at the extreme left (e.g. Na₂O); AMPHOTERIC in the centre (Al₂O₃); most ACIDIC at the extreme right (Cl₂O₇)
Answer & Solution
Correct answer: D. Most BASIC at the extreme left (e.g. Na₂O); AMPHOTERIC in the centre (Al₂O₃); most ACIDIC at the extreme right (Cl₂O₇)
Per NCERT §3.7.3 + Problem 3.10, Na₂O + H₂O → NaOH (basic); Cl₂O₇ + H₂O → HClO₄ (acidic). Al₂O₃ amphoteric.
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