Which of the following statements is/are correct? (a) \( \mathrm{pK}_{\mathrm{al}} \) of maleic ...

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Which of the following statements is/are correct?
(a) \( \mathrm{pK}_{\mathrm{al}} \) of maleic acid is less than \( \mathrm{pK}_{\mathrm{al}} \) of fumaric acid.
(b) \( \mathrm{pK}_{\mathrm{a} 2} \) of maleic acid is less than \( \mathrm{pK}_{\mathrm{a} 2} \) of fumaric acid.
(c) Phthalic acid is a stronger acid than isophthalic acid.
(d) Isopthalic acid is a stronger acid than terephthalic acid.
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