Single Answer MCQ
Q-00001829
Write a balanced chemical equation for the reaction of calcium and potassium with water.
1
Ca + H2O -> Ca(OH)2 + H2
2
K + H2O -> KOH + H2
3
Ca + H2O -> CaO + H2
4
K + H2O -> K2O + H2
Answer and Solution
Answer
A. Ca + H2O -> Ca(OH)2 + H2
Solution:
When calcium reacts with water, it forms calcium hydroxide (Ca(OH)2) and hydrogen gas (H2). The balanced chemical equation for this reaction is Ca + 2H2O -> Ca(OH)2 + H2.
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