A) \[N{{O}_{2}}C{{H}_{2}}COOH>\,NCC{{H}_{2}}COOH>\,FC{{H}_{2}}COOH>\,ClC{{H}_{2}}COOH\]
B) \[FC{{H}_{2}}COOH>\,NCC{{H}_{2}}COOH>N{{O}_{2}}CHCOOH>ClC{{H}_{2}}COOH\]
C) \[N{{O}_{2}}C{{H}_{2}}COOH>FC{{H}_{2}}COOH>\,NCC{{H}_{2}}COOH>\text{ClC}{{H}_{2}}COOH\]
D) \[NCC{{H}_{2}}COOH>{{O}_{2}}NC{{H}_{2}}COOH>FC{{H}_{2}}COOH>ClC{{H}_{2}}COOH\]
Correct Answer: A
Solution :
EWG increase acidic strength \[N{{O}_{2}}C{{H}_{2}}COOH\,\,>\,\,NCC{{H}_{2}}COOH\,\,>\,FC{{H}_{2}}COOH\,\,>\]\[ClC{{H}_{2}}COOH.\]
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