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प्रश्न
Calcium oxide reacts vigorously with water to produce slaked lime.
\[\ce{CaO{(s)} + H2O(l) -> Ca(OH)2(aq)}\]
This reaction can be classified as:
(A) Combination reaction
(B) Exothermic reaction
(C) Endothermic reaction
(D) Oxidation reaction
पर्याय
(A) and (C)
(C) and (D)
(A), (C) and (D)
(A) and (B)
उत्तर
When calcium oxide reacts with water it produces slaked lime and a huge amount of heat is released, this reaction can be classified as a combination reaction.
Hence, the correct answer is (A) and (B).
संबंधित प्रश्न
What type of chemical reaction take place when a magnesium wire is burnt in air?
Define a combination reaction.
What happens during a chemical reaction ?
Explain the terms with examples.
Combination reaction
(a) What is double displacement reaction? Explain with an example.
(b) A small amount of quick lime is added to water in a beaker.
(i) Name and define the type of reaction that has taken place.
(ii) Write balanced chemical equation for the above reaction and the chemical name of the product formed.
(iii) List two main observations of this reaction.
Define: Chemical combination reaction
H2(g) + Cl29(g) → 2HCl(g) is a ______
Which of the following are exothermic processes?
(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)
A clear solution of slaked lime is made by dissolving Ca(OH)2 in an excess of water. This solution is left exposed to air. The solution slowly goes milky as a faint white precipitate forms. Explain why a faint white precipitate forms, support your response with the help of a chemical equation.
- Assertion: Rusting of Iron is endothermic in nature.
- Reason: As the reaction is slow, the release of heat is barely evident.
