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प्रश्न
Assertion (A): Reaction of Quicklime with water is an exothermic reaction.
Reason (R): Quicklime reacts vigorously with water releasing a large amount of heat.
पर्याय
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
उत्तर
Both (A) and (R) are true and (R) is the correct explanation of (A).
Explanation:
Slaked lime is produced with the evolution of a great deal of heat when quicklime (calcium oxide) is treated with water. This reaction is therefore exothermic in nature.
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संबंधित प्रश्न
Give the molecular formula of bleaching powder.
Write the chemical name of bleaching powder and write its properties.
Name the substance obtained by the action of chlorine on solid (dry) slaked lime.
State two uses each of the following compounds:
Chlorine
Which of the following is treated with chlorine to obtain bleaching powder?
(a) CaSO4
(b) Ca(OH)2
(c) Mg(OH)2
(d) KOH
Give a scientific explanation.
Bleaching powder has the odour of chlorine.
Write the chemical formula.
Bleaching powder
Brine is an ____________.
The reaction between MnO2 with HCl is depicted in the following diagram. It was observed that gas with bleaching abilities was released.
The chemical reaction between MnO2 and HCl is an example of:
Chlorine gas reacts with ____________ to form bleaching powder.
