Frequent question: Which alcohol forms turbidity immediately in Lucas test?

Tertiary alcohols react immediately with Lucas reagent as evidenced by turbidity owing to the low solubility of the organic chloride in the aqueous mixture. Secondary alcohols react within five or so minutes (depending on their solubility).

Which alcohol gives Lucas test immediately?

– 2-methyl propan-2-ol is tertiary alcohol and as we know that tertiary alcohols show turbidity immediately and they give Lucas test.

Which of the following alcohol will give immediate turbidity?

Butan-3-ol.

How many alcohols give immediate turbidity?

Correct answer is ‘5’.

Who will give turbidity faster in Lucas test?

Tertiary alcohols form the turbidity fastest in Lucas test while primary alcohols form slowest.

Which gives immediate turbidity?

Detailed Solution

The rate of reaction of alcohol with HCl is in the order 3 o > 2 o > 1 o. Hence, tertiary alcohol gives turbidity immediately. Hence the correct option is (CH 3) 3COH.

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Which alcohol is most reactive towards Lucas reagent?

Hence, tertiary butyl alcohol is most reactive with Lucas Reagent.

Does benzyl alcohol give Lucas test?

A. A screen for such alcohol is the Lucas reagent (concentrated HCl and ZnCl2). Like tertiary alcohols, benzyl alcohols (Ph-C-OH), allylic alcohols (C=C-C-OH), and propargyl alcohols (C-C-C-OH) also provide immediate results.

Which of the following alcohol will give immediate turbidity at room temperature when reacts with Lucas agent?

Tertiary alcohol gives turbidity immediately with Lucas reagent. 2-hydroxy-2-methyl propane is a tertiary alcohol.

Which among the following alcohol gives immediate turbidity with Lucas reagent conc HCl and ZnCl2 )?

Tertiary alcohol reacts fastest with Lucas reagent. The reagent, conc. HCl and anhydrous ZnCl2 is Lucas reagent, which is used to distinguish between 1°, 2° and 3° alcohols. 3° alcohol + Lucas reagent → Immediate turbidity.

Which of the following will not give any turbidity with Lucas reagent?

Primary alcohols do not react with Lucas reagent at room temperature and hence no turbidity is formed.

Which gives an immediate turbidity with zncl2 HCl?

butan-2-ol.

How many structural alcohol of formula c5h12o can give instant turbidity with Lucas?

– There are eight structural isomeric alcohols of pentanol. – Therefore, alcoholic structural isomers having the molecular formula, ${{C}_{5}}{{H}_{11}}OH$ are eight. Therefore, the correct answer is option C.

Which alcohol reacts fastest with HBr?

2-methyl propane-2-ol is tertiary alcohol and thus, reacts fastest with HBr.

Which of the following does react immediately with Lucas reagent?

Tertiary alcohols give turbidity immediately with Lucas reagent.

Is butanol a primary alcohol?

1-Butanol, or butyl alcohol, is a four-carbon chain, with the OH group on an end carbon. It is used as a solvent and a paint thinner, and has some potential use as a biofuel. Butyl alcohol is a primary (1º) alcohol, and is easily oxidized.

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