MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryGOCPrevious Year Questions

Which of the following represents the correct order of the acidity in the given compounds ? (AIPMT 2007)

A.CH3COOH >BrCH2COOH >ClCH2COOH
B.FCH2COOH > CH3COOH > BrCH2COOH
C.BrCH2COOH >ClCH2COOH > FCH2COOH
D.FCH2COOH >ClCH2COOH >BrCH2COOH✓ Correct
Explanation

The order of acidity of compounds depends on the electron withdrawing substituent. Among halogens, the order of electronegativity is as follows- 3 F>Cl>Br>CH Thus, the –I effect decreases and hence the acidity decreases Thus, the correct option is (d) 2 2 2 3 FCH COOH>ClCH COOH>BrCH COOH>CH COOH

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