Advertisements
Advertisements
Question
Assertion (A): Reaction of Quicklime with water is an exothermic reaction.
Reason (R): Quicklime reacts vigorously with water releasing a large amount of heat.
Options
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.
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
What is the common name of the compound CaOCl2?
Name the substance obtained by the action of chlorine on solid (dry) slaked lime.
State two uses of the following compound:
Chlorine
How is bleaching powder prepared? Write a chemical equation of the reaction involved in the preparation of bleaching powder.
What happens when bleaching powder reacts with dilute sulphuric acid? Give equation of the reaction involved.
State two important uses of bleaching powder.
A white powdery substance having strong smell of chlorine is used for disinfecting drinking water supply at waterworks. Identify the substance. Give its chemical name and write the chemical reaction for its preparation.
Give a scientific explanation.
Bleaching powder has the odour of chlorine.
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:
