KCET · Chemistry · Alcohols Phenols and Ethers
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
Answer & Solution
Correct Answer
(B) Two primary and one secondary alcoholic groups
Step-by-step Solution
Detailed explanation
The chemical formula of glycerol is \(CH_2(OH)-CH(OH)-CH_2(OH)\).
The two terminal \(-OH\) groups are attached to primary carbon atoms (\(-CH_2-\)), making them primary alcoholic groups.
The middle \(-OH\) group is attached to a secondary carbon atom (\(-CH-\)), making it a secondary alcoholic group.
Therefore, glycerol contains two primary and one secondary alcoholic groups.
Answer: Two primary and one secondary alcoholic groups
The two terminal \(-OH\) groups are attached to primary carbon atoms (\(-CH_2-\)), making them primary alcoholic groups.
The middle \(-OH\) group is attached to a secondary carbon atom (\(-CH-\)), making it a secondary alcoholic group.
Therefore, glycerol contains two primary and one secondary alcoholic groups.
Answer: Two primary and one secondary alcoholic groups
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