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Properties of alcohol Questions in English
Class 12 Chemistry · Alcohols, Phenols and Ethers · Properties of alcohol
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MediumMCQ
$R - CH_2OH$ is converted into $R - CHO$ by reacting with . . . . . .
A
Alkaline $KMnO_4$
B
$LiAlH_4$
C
$Na/C_2H_5OH$
D
$PCC$ (Pyridinium Chlorochromate)
Solution
(D) $1$. $R - CH_2OH$ is a primary alcohol.
$2$. Alkaline $KMnO_4$ is a strong oxidizing agent that oxidizes primary alcohols directly to carboxylic acids.
$3$. $LiAlH_4$ and $Na/C_2H_5OH$ are reducing agents.
$4$. $PCC$ (Pyridinium Chlorochromate) is a mild oxidizing agent that selectively oxidizes primary alcohols to aldehydes without further oxidation to carboxylic acids.
$2$. Alkaline $KMnO_4$ is a strong oxidizing agent that oxidizes primary alcohols directly to carboxylic acids.
$3$. $LiAlH_4$ and $Na/C_2H_5OH$ are reducing agents.
$4$. $PCC$ (Pyridinium Chlorochromate) is a mild oxidizing agent that selectively oxidizes primary alcohols to aldehydes without further oxidation to carboxylic acids.
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View Solution902
MediumMCQ
Glycerol is a trihydric alcohol. It contains . . . . . .
A
One primary, one secondary and one tertiary alcoholic groups.
B
Two primary and one secondary alcoholic groups.
C
Two secondary and one primary alcoholic groups.
D
One primary and two tertiary alcoholic groups.
Solution
(B) The chemical structure of glycerol is $CH_2(OH)CH(OH)CH_2(OH)$.
In this structure, the two terminal carbon atoms are bonded to one $-OH$ group each, making them primary alcoholic groups.
The central carbon atom is bonded to one $-OH$ group and two other carbon atoms, making it a secondary alcoholic group.
Therefore, glycerol contains two primary and one secondary alcoholic groups.
In this structure, the two terminal carbon atoms are bonded to one $-OH$ group each, making them primary alcoholic groups.
The central carbon atom is bonded to one $-OH$ group and two other carbon atoms, making it a secondary alcoholic group.
Therefore, glycerol contains two primary and one secondary alcoholic groups.
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View SolutionAlcohols, Phenols and Ethers — Properties of alcohol · Frequently Asked Questions
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