Q33 / 120 · NTA Abhyas (JEE Main) 2020 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

How many monobasic acids are there ?

$H_{3} P O_{2}, H_{3} P O_{3}, H_{2} C O_{3}, H_{2} S O_{4}, H_{2} S_{2} O_{4}, H_{2} C r O_{4}, H_{3} B O_{3}, H N O_{2}$

Correct answer: 3

Solution

Here

H N O_{2}, H_{3} P O_{2}

and

H_{3} B O_{3}

are monobasic

\begin{array}{l} H \\ | \\ H - P - O - H - H - O - N = O \\ | | \\ O \end{array}

H

given as

H^{+}

H_{3} B O_{3} + H O H \to [B {(O H)_{4}]}^{-} + H_{3} O

Hence, the correct answer is 3.

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