
Bleaching powder loses its power on keeping for a long time because :
(A) It changes into calcium hypochlorite
(B) It changes into calcium chloride and calcium hydroxide
(C) It absorbs moisture
(D) It changes into calcium chloride and calcium chlorate
Answer
163.5k+ views
Hint: In this question, we will discuss the bleaching powder. First we understand some common properties of bleaching powder, then we discuss what happens when the bleaching powder is exposed to air and why it loses its power after a long time.
Complete Step by Step Solution:
Bleaching powder's chemical formula is CaOCl2 with a chemical name as Calcium hypochlorite This is a light yellowish powder and has a strong smell of chlorine. If bleaching powder is held exposed in the air, it reacts with carbon dioxide from the atmosphere to produce calcium carbonate $(CaC{{O}_{3}})$ and chlorine gas $(C{{l}_{2}})$
$CaOC{{l}_{2}}+C{{O}_{2}}\to CaC{{O}_{3}}+C{{l}_{2}}$
Calcium carbonate is a food fibre that is used when the calcium contained in the diet is not proper. Calcium is essential for healthy bones, muscles, nervous system and heart. Also, calcium carbonate is used as an antacid to mitigate heartburn, acid indigestion and stomach discomfort. Chlorine is a compound used in making goods for household washing. Chlorine is a gas, at room temperature. It is shown a yellow-green colour, and an unpleasant, pungent smell.
When the bleaching powder is exposed to air for a long time, it undergoes autoxidation into calcium chlorate and calcium chloride and loses its power.
$6CaOC{{l}_{2}}\to 6Ca{{(ClO{}_{3})}_{2}}+5CaC{{l}_{2}}$
Thus, Option (D) is correct.
Note: Bleaching powder has many uses in our daily life. It is used for bleaching dirty clothes in the laundry, and acts as a bleaching agent for cotton and linen in the textile industry. It is used as a purifier which is used for disinfecting water to make fresh water.
Complete Step by Step Solution:
Bleaching powder's chemical formula is CaOCl2 with a chemical name as Calcium hypochlorite This is a light yellowish powder and has a strong smell of chlorine. If bleaching powder is held exposed in the air, it reacts with carbon dioxide from the atmosphere to produce calcium carbonate $(CaC{{O}_{3}})$ and chlorine gas $(C{{l}_{2}})$
$CaOC{{l}_{2}}+C{{O}_{2}}\to CaC{{O}_{3}}+C{{l}_{2}}$
Calcium carbonate is a food fibre that is used when the calcium contained in the diet is not proper. Calcium is essential for healthy bones, muscles, nervous system and heart. Also, calcium carbonate is used as an antacid to mitigate heartburn, acid indigestion and stomach discomfort. Chlorine is a compound used in making goods for household washing. Chlorine is a gas, at room temperature. It is shown a yellow-green colour, and an unpleasant, pungent smell.
When the bleaching powder is exposed to air for a long time, it undergoes autoxidation into calcium chlorate and calcium chloride and loses its power.
$6CaOC{{l}_{2}}\to 6Ca{{(ClO{}_{3})}_{2}}+5CaC{{l}_{2}}$
Thus, Option (D) is correct.
Note: Bleaching powder has many uses in our daily life. It is used for bleaching dirty clothes in the laundry, and acts as a bleaching agent for cotton and linen in the textile industry. It is used as a purifier which is used for disinfecting water to make fresh water.
Recently Updated Pages
JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Chemical Properties of Hydrogen - Important Concepts for JEE Exam Preparation

JEE Energetics Important Concepts and Tips for Exam Preparation

JEE Isolation, Preparation and Properties of Non-metals Important Concepts and Tips for Exam Preparation

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Displacement-Time Graph and Velocity-Time Graph for JEE

Types of Solutions

Degree of Dissociation and Its Formula With Solved Example for JEE

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

JEE Advanced Weightage 2025 Chapter-Wise for Physics, Maths and Chemistry

NCERT Solutions for Class 11 Chemistry In Hindi Chapter 1 Some Basic Concepts of Chemistry

NCERT Solutions for Class 11 Chemistry Chapter 7 Redox Reaction

NEET 2025 – Every New Update You Need to Know

Verb Forms Guide: V1, V2, V3, V4, V5 Explained
