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Grade Upto college level Engineering Entrance Exams

Isopropyl alcohol is heated on a water bath with the suspension of bleaching powder. Which of the following products will be formed? A. Propene B. Ethanol C. Isopropyl chloride D. Trichloromethane

Profile image of Manvendra Singh chahar
12 Years agoGrade Upto college level
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2 Answers

Profile image of Saurabh Koranglekar
6 Years ago

When isopropyl alcohol is heated on a water bath with a suspension of bleaching powder, the primary reaction that occurs involves the chlorine that is present in the bleaching powder, which is often sodium hypochlorite or calcium hypochlorite. This reaction leads to the formation of isopropyl chloride. Therefore, the correct answer is C. Isopropyl chloride.

Understanding the Reaction Mechanism

To delve deeper into why isopropyl chloride is the product, let’s break down the process:

  • Starting Material: Isopropyl alcohol (C3H8O) is a secondary alcohol.
  • Bleaching Powder: This compound contains chlorine, which is a key reactant in this scenario.

The Role of Chlorination

When isopropyl alcohol is treated with chlorine in the presence of heat, a substitution reaction occurs. Here’s how it works:

  1. Chlorine interacts with the hydroxyl group (-OH) of isopropyl alcohol.
  2. This interaction leads to the formation of a carbocation intermediate.
  3. The chlorine ion then replaces the hydroxyl group, converting isopropyl alcohol into isopropyl chloride (C3H7Cl).

Why Not the Other Options?

Let's discuss why the other options are not formed in this reaction:

  • Propene (A): Propene is an alkene that would form if isopropyl alcohol underwent dehydration, typically in the presence of an acid, not in this chlorination reaction.
  • Ethanol (B): Ethanol is a different alcohol and would not be produced from isopropyl alcohol under these conditions.
  • Trichloromethane (D): Also known as chloroform, this compound is typically formed from the chlorination of methane or other similar hydrocarbons, not from isopropyl alcohol.

Real-World Applications

Isopropyl chloride has various applications, including as a solvent and in organic synthesis. Understanding how it’s produced through chlorination of alcohols is crucial in fields like pharmaceuticals and chemical manufacturing.

In summary, heating isopropyl alcohol with bleaching powder primarily leads to the formation of isopropyl chloride due to the chlorination process. This illustrates the importance of reactants in determining the outcome of chemical reactions.

Profile image of Vikas TU
6 Years ago
CaOCl2 + H2O →Ca(OH)2 + Cl2
C2H5OH + [O] →CH3CHO
CH3CHO + Cl2 →CCl3HO
CCl3CHO + Ca(OH)2 → CHCl3 + (HCOO)2Ca

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