Home
Class 12
CHEMISTRY
In the following questions, a statement ...

In the following questions, a statement of assertion (A) is following by a statement of reason (R )
A : when chloroform is obtained from bleaching powder and ethanol then chlorine acts as oxidising agent only.
R : It oxidises ethanol into acetic acid.

A

If both Assertion & Reason are the reason is the correct explanation of the assertion, then mark (1).

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark(2).

C

If Assertion is true statement but Reason is false , then mark (3)

D

If both Assertion and Reason are false statements, then mark (4)

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the assertion (A) and reason (R) provided in the question, let's break down the information step by step. ### Step 1: Understanding the Assertion **Assertion (A):** When chloroform is obtained from bleaching powder and ethanol, then chlorine acts as an oxidizing agent only. - **Explanation:** In the reaction involving bleaching powder (calcium oxychloride, Ca(OCl)2) and ethanol (C2H5OH), chlorine (Cl2) is generated. This chlorine acts as an oxidizing agent in the reaction. ### Step 2: Reaction of Chlorine with Ethanol - When chlorine reacts with ethanol, it oxidizes ethanol to acetaldehyde (CH3CHO) rather than acetic acid (CH3COOH). - The reaction can be represented as: \[ \text{C}_2\text{H}_5\text{OH} + \text{Cl}_2 \rightarrow \text{CH}_3\text{CHO} + 2\text{HCl} \] - Here, ethanol is oxidized to acetaldehyde, and hydrochloric acid (HCl) is formed. ### Step 3: Formation of Chloroform - The acetaldehyde formed can further undergo a haloform reaction with bleaching powder to produce chloroform (CHCl3). - The reaction can be represented as: \[ \text{CH}_3\text{CHO} + \text{Ca(OCl)}_2 \rightarrow \text{CHCl}_3 + \text{Ca(OH)}_2 + \text{other products} \] - This shows that chloroform is indeed formed from the reaction of acetaldehyde with bleaching powder. ### Step 4: Evaluating the Reason **Reason (R):** It oxidizes ethanol into acetic acid. - **Explanation:** This statement is incorrect because chlorine oxidizes ethanol to acetaldehyde, not acetic acid. Therefore, the reason provided does not support the assertion. ### Conclusion - The assertion (A) is correct because chlorine acts as an oxidizing agent in the formation of chloroform from ethanol. - The reason (R) is incorrect because it states that ethanol is oxidized to acetic acid, while it is actually oxidized to acetaldehyde. ### Final Answer - The correct option is: **Assertion is true, Reason is false.** ---
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • HALOALKANES AND HALOARENES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - C|39 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    AAKASH INSTITUTE ENGLISH|Exercise Try Yourself|33 Videos

  • HYDROCARBONS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment(Section - C) (Previous Years Questions)|60 Videos

Similar Questions

Explore conceptually related problems

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : O_(2) is paramagnetic . R : N_(2) is paramagnetic .

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : Both methane and tetrachloromethane are nonpolar. R : C-Cl bond is polar bond.

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : PCl_(5) exist but NCl_(5) does not R : Nitrogen is highly inert.

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : H-F forms stronger hydrogen bond than H_(2)O . R : F is more electronegative than oxygen.

In the following questions a statement of assertion (A) is followed by a statement of reason ( R) A : Cu, Ag, Au are known as coinage metal. R: Coinage metals are d-block metals .

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : LiCl is more covalent than BeCl_(2) R : Li^(*) ion is smaller than Be^(2+) .

In the following questions, a statement of assertion (A) is following by a statement of reason (R ) A: on reaction with alcoholic KOH gives R: Bond energy of C-D bond is less than of C-H bond.

In the following questions , a statement of assertion (A) is followed by a statement of reason (R). A: Bond order of CO_3^-2 is 1.33 R: Carbonate ion is isoelectronic with nitrate ion.

In the following questions a statement of assertion (A) is followed by a statement of reason ( R) A : Lanthanum ( Z: 57) is lanthanoid . R : Valence electrons are present in 4 f orbital.

In the following question a statement of assertion (A) is followed by a statement of reason (R ) A: Absolute value of potential is not defined R : Two equipotential lines cannot intersect each other.

Home
Profile