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Statement-1: Equimolar mixture of conc. ...

Statement-1: Equimolar mixture of conc. HCl and anhydrous zinc chlorie is called Lucas reagent.
Statement-2: Lucas reagent can be used to distinguish between methanol and ethanol.

A

Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1.

B

Statement-1 is true,s tatement-2 is true, statement-2 is not a correct explanation for statement-1.

C

Statement-1 is true, statement-2 is false.

D

Statement-1 is false, statement-2 is true.

Text Solution

AI Generated Solution

The correct Answer is:
To determine the validity of the statements provided, we will analyze each statement step by step. ### Step 1: Analyze Statement 1 **Statement 1:** "Equimolar mixture of conc. HCl and anhydrous zinc chloride is called Lucas reagent." - **Explanation:** The Lucas reagent is indeed an equimolar mixture of concentrated hydrochloric acid (HCl) and anhydrous zinc chloride (ZnCl₂). This reagent is commonly used in organic chemistry to test for the presence of alcohols, particularly to differentiate between primary, secondary, and tertiary alcohols. **Conclusion for Statement 1:** True. ### Step 2: Analyze Statement 2 **Statement 2:** "Lucas reagent can be used to distinguish between methanol and ethanol." - **Explanation:** The Lucas test is used to differentiate between alcohols based on their reactivity with the reagent. Methanol (a primary alcohol) does not react readily with Lucas reagent at room temperature, while ethanol (a secondary alcohol) reacts to form an alkyl chloride and produces a cloudy solution after some time. This difference in reactivity allows for the distinction between methanol and ethanol. **Conclusion for Statement 2:** True. ### Final Conclusion Both statements are true. - **Statement 1 is true** because the Lucas reagent is indeed an equimolar mixture of concentrated HCl and anhydrous zinc chloride. - **Statement 2 is true** because the Lucas reagent can distinguish between methanol and ethanol based on their different reactivities.

To determine the validity of the statements provided, we will analyze each statement step by step. ### Step 1: Analyze Statement 1 **Statement 1:** "Equimolar mixture of conc. HCl and anhydrous zinc chloride is called Lucas reagent." - **Explanation:** The Lucas reagent is indeed an equimolar mixture of concentrated hydrochloric acid (HCl) and anhydrous zinc chloride (ZnCl₂). This reagent is commonly used in organic chemistry to test for the presence of alcohols, particularly to differentiate between primary, secondary, and tertiary alcohols. **Conclusion for Statement 1:** True. ...
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Knowledge Check

  • Assertion: equimolar mixture of conc. HCI and anhydrous zinc chloride is called Lucas reagent. Reason: Lucas reeagent can be used to distinguish between methanol and ethanol.

    A
    If both assertion and reason are true and the reason is the correct explanantion of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanantion of the asseriton.
    C
    If assertion is true but reason is false.
    D
    If assertion if false but reason is ture.
  • Lucas test can be used to distinguished between

    A
    Phenol and p-cresol
    B
    Propan-1-ol and ethanol
    C
    Butan-1-ol and 2-methylpropan-2-ol
    D
    Ethanol and glycol
  • Hinsberg reagent can be used to distinguish between

    A
    primary and secondary amine.
    B
    primary and secondary alcohol.
    C
    cyanide and isocyanide.
    D
    aldehyde and ketone.
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