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Chemistry Metals and Non-metals CBSE Board 2026 Easy

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’ :
  1. (a)Potassium
  2. (b)Calcium
  3. (c)Sodium
  4. (d)Iron

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