Which of the following represents the correct order of increasing pKa values of the given acids?
A
HClO4<HNO3<H2CO3<B(OH)3
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B
HNO3<HClO4<B(OH)3<H2CO3
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C
B(OH)3<H2CO3<HClO4<HNO3
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D
HClO4<HNO3<B(OH)3<H2CO3
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Solution
The correct option is AHClO4<HNO3<H2CO3<B(OH)3 As we know, acidic strength of acids as HClO4>HNO3>H2CO3>B(OH)3 +7 +5 +4 and as we know, more stronger acid have lower value of pKa so pKa order HClO4<HNO3<H2CO3<B(OH)3