The reaction of calcium with cold water is :

The reaction of calcium with cold water is :
  1. Less violent, but the heat evolved is sufficient for the hydrogen to catch fire.
  2. Very violent and exothermic and hydrogen catches fire.
  3. Exothermic, but the heat evolved is not sufficient for the hydrogen to catch fire.
  4. Slow and endothermic.

Solution

Exothermic, but the heat evolved is not sufficient for the hydrogen to catch fire.

Asked in: CBSE

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