Question

A compound is soluble in conc. H\(_2\)SO\(_4\). It does not decolourise bromine in carbon tetrachloride but is oxidised by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is

• A. a primary alcohol
• B. a tertiary alcohol
• C. an alkane
• D. an alkene

Hint:

Primary alcohols are easily oxidized to aldehydes and carboxylic acids, as shown in the reaction with chromic anhydride.

Answer 1

The Correct Option is A

Step 1: Understand the chemical reactions.
The compound undergoes oxidation with chromic anhydride and changes color, which suggests it is a primary alcohol. Primary alcohols are oxidized to aldehydes and then to carboxylic acids.
Step 2: Conclusion.
Thus, the original compound is a primary alcohol.
Final Answer: \[ \boxed{\text{a primary alcohol}} \]