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Assertion : Change in colour of the acid...

Assertion : Change in colour of the acidic solution of breath is used as a test for drunken driver.
Reason : Change in colour is due to complexation of alcohol with potassium dichromate.

A

if both Assertion and Reason are true and reason is the correct explanation of the assertion.

B

if both assertion and reason are true but reason is not the correct expalanation of the assertion

C

if assertion is true, reason is false

D

both assertion and reason are false statements.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given assertion and reason, we will break down the statements and evaluate their correctness step by step. ### Step 1: Understanding the Assertion **Assertion**: Change in color of the acidic solution of breath is used as a test for drunken drivers. - This statement is true. The breathalyzer test is indeed used to determine the blood alcohol content (BAC) of a driver by measuring the alcohol content in their breath. The color change in the solution indicates the presence of alcohol. **Hint**: Think about how breathalyzer tests work and their purpose in detecting alcohol levels. ### Step 2: Understanding the Reason **Reason**: Change in color is due to the complexation of alcohol with potassium dichromate. - This statement is false. The color change observed in the breathalyzer test is not due to complexation. Instead, it is due to the oxidation of alcohol by potassium dichromate (K2Cr2O7) in an acidic medium (usually sulfuric acid, H2SO4). The potassium dichromate changes from orange to green as it gets reduced during the oxidation of alcohol to acetic acid. **Hint**: Consider the chemical reactions involved when alcohol is oxidized and how potassium dichromate behaves in acidic conditions. ### Step 3: Conclusion - Since the assertion is true and the reason is false, we conclude that the correct answer is that the assertion is true, but the reason is false. ### Final Answer - The correct option is: **Assertion is true, reason is false.** ### Summary of Steps: 1. **Evaluate the assertion**: Confirmed it is true. 2. **Evaluate the reason**: Confirmed it is false. 3. **Conclude the relationship**: Assertion true, reason false.
To analyze the given assertion and reason, we will break down the statements and evaluate their correctness step by step. ### Step 1: Understanding the Assertion **Assertion**: Change in color of the acidic solution of breath is used as a test for drunken drivers. - This statement is true. The breathalyzer test is indeed used to determine the blood alcohol content (BAC) of a driver by measuring the alcohol content in their breath. The color change in the solution indicates the presence of alcohol. **Hint**: Think about how breathalyzer tests work and their purpose in detecting alcohol levels. ...
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