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When an element ‘X’ reacts with water, it starts floating. Identify the element 'X' :
- (a)Potassium
- (b)Calcium
- (c)Sodium
- (d)Iron
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(B) / Calcium (1 Mark)
When an element ‘X’ reacts with water, it starts floating. Identify the element 'X' :
CBSE Class 10 Science PYQ · Metals and Non-metals · Chemical properties of metals · 1 Mark · March 2026 · Standard
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