Discussion Forum



1)

A compound is soluble in conc. H2SO4. 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 ether

Answer:

Option A

Explanation:

Solubility of the compound in conc.H2SO4 indicates that it can be an alkene, alcohol or ether. The inability to discharge bromine colour indicates the absence of an alkene. Hence. the compound is alcohol which should be primary because it is readily (within 2 seconds) oxidised byCrO3 in sulphuric acid.