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 : Ethylidene chloride on alkaline hydrolysis gives acetaidehyde.
R: Two chlorine atoms attached with adjacent carbon atom in alkylidene chloride .

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 solve the question regarding the assertion and reason statements, we will analyze each part step by step. ### Step 1: Understanding the Assertion The assertion states that "Ethylidene chloride on alkaline hydrolysis gives acetaldehyde." - Ethylidene chloride (also known as 1,1-dichloroethane) has the structure CH3CCl2H. - When ethylidene chloride undergoes alkaline hydrolysis, it reacts with water in the presence of a base (OH⁻). ### Step 2: Reaction Mechanism In alkaline hydrolysis, the hydroxide ion (OH⁻) attacks the carbon atom bonded to the chlorine atoms: 1. The hydroxide ion attacks one of the carbon atoms, leading to the displacement of one chlorine atom. 2. This forms an intermediate compound where the remaining chlorine atom is still attached to the carbon. 3. The lone pair of electrons on the oxygen can then shift to form a double bond with the carbon, leading to the formation of acetaldehyde (CH3CHO). ### Step 3: Conclusion on Assertion Since the reaction indeed produces acetaldehyde, the assertion is **correct**. ### Step 4: Understanding the Reason The reason states that "Two chlorine atoms are attached to adjacent carbon atoms in alkylidene chloride." - In ethylidene chloride, the structure is CH3CCl2H, where both chlorine atoms are attached to the same carbon atom (the second carbon in the chain). - Therefore, the statement that the chlorine atoms are on adjacent carbon atoms is **incorrect**. ### Step 5: Conclusion on Reason Since the reason is incorrect, we conclude that the assertion is true but the reason is false. ### Final Conclusion - Assertion (A) is **true**. - Reason (R) is **false**. ### Answer The correct option is **C**: Assertion is true, but reason is false. ---
Promotional Banner

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 following by a statement of reason (R ) A : primary alkyl halides on oxidation with DMSO gives aldehydes. R : DMSO is used as polar aprotic solvent .

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 : Both methane and tetrachloromethane are nonpolar. R : C-Cl bond is polar bond.

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: The number of lone pairs in CO_2 molecule is zero. R: The formal charge of C atom in CO_2 is +4.

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.

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 : Halogen is deactivating group due to -I effect. R: Halogen is ortho -para directing due to +M effect .

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : Equal number of sigma and pi bonds are present in ethyne. R : pi Bond is stronger than sigma bond.