JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall
JEE Main 24 February 2021, Shift 1, Chemistry Q40
Question 40 of 90 in this shift, Chemistry question 10 of 30, Section A.
Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. followed by treatment with NaOH ?
The figure, in words
Options 1 to 4 are drawn structures (benzene rings with OH / CH3 / zig-zag chain substituents); see option text.- (1)[figure: benzene ring with an OH substituent and, at the carbon directly opposite, a substituent chain drawn as a zig-zag of two CH2 bonds ending in CH3]
- (2)[figure: benzene ring with an OH substituent and, at the adjacent ring carbon, a zig-zag chain of two CH2 bonds ending in CH3]Official answer
- (3)[figure: benzene ring with three substituents: H3C, HO and OH, and a zig-zag chain of two CH2 bonds ending in CH3; the HO and OH are drawn at the two lower ring carbons and the H3C and the chain at the two upper ring carbons]
- (4)[figure: benzene ring with three substituents: HO and HO at the two left ring carbons, a zig-zag chain of two CH2 bonds ending in CH3 at the upper right ring carbon, and CH3 at the lower right ring carbon]
Official answer
Option 2
NTA final key.
- Chapter
- Alcohols, Phenols and Ethers
- Topic
- Alcohols and Phenols
- Idea tested
- Phthalein Dye Test