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Science · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 1 · Q23
When an element 'X' reacts with water, it starts floating. Identify the element 'X':
When an element 'X' reacts with water, it starts floating. Identify the element 'X' :
Official answer
(B)
Calcium
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CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.