A small amount of quick lime is taken in a beaker. Water is added slowly to the
beaker. Which of the following observations were noted ?
(a) Hissing sound and the solution becomes hot
(b) No characteristic sound and solution turns cold
(c) Hissing sound and the solution becomes cold.
(d) No characteristic sound and the solution becomes hot.
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(A) Hissing sound and the solution becomes hot.
malavikasr11:
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(a) Hissing sound and the solution becomes hot.
- Equation: CaO + H2O -> Ca(OH)2 + Heat
- This is a combination reaction in which two or more reactants combine to form a single product.
- Calcium oxide (quick lime) reacts vigorously when reacts with water produces slaked lime is calcium hydroxide.
- A large amount of heat is evolved so this is an exothermic reaction.
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