A compound 'z' decolorizes bromine water and produces white ppt. The compound 'z' is:
Correct answer: B. Phenol
- A. Alkane
- B. Phenol
- C. Alcohol
- D. Benzene
Explanation
Option B is correct.Yes, the compound 'z' is phenol. Phenol is an aromatic compound with the formula C6H5OH. It is a white, crystalline solid that is soluble in water and alcohol. Phenol is a strong acid and can be corrosive to skin and eyes. Phenol decolorizes bromine water due to its ability to oxidize bromine. When phenol is added to bromine water, the bromine reacts with the phenol to form a white precipitate of 2,4,6-tribromophenol. The reaction can be represented by the following equation: C6H5OH + 3Br2 → C6H2(Br3)OH + 3H2O Phenol also produces a white precipitate when it is added to a solution of sodium hydroxide. This is due to the formation of sodium phenoxide, which is a white, crystalline solid.
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About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary alcohols.
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