_The correct order of acidic strength is :.

1) CH3 CH2 CHFCOOH > CH3 CHFCH2 COOH > FCH2 CH2 CH2 COOH

2) CH3 CH2 CHFCOOH < CH3 CHFCH2 COOH < FCH2 CH2 CH2 COOH

3) CH3 CH2 CHFCOOH > CH3 CHFCH2 COOH < FCH2 CH2 CH2 COOH


_Which of the following is the strongest acid ?
a) CL3 CCOOH
b) CL2 CHFCOOH
c) CLCH2 COOH
d) CH3 COOH
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