ICSE BoardEnglish MediumSTD 10ChemistrySulphuric Acid1 Mark
MCQ
$H _2 SO _4$ is a _______ .
A
Monobasic acid
B
Diacidic base
C
Monoacidic base
D
Dibasic acid
✓
Answer
D. Dibasic acid Explanation: $H _2 SO _4$ when dissolved in water shows the following reactions: $\begin{array}{l} H_2 SO_4+H_2 O=H_3 O^{+}+HSO_4^{-} \\ HSO_4^{-}+H_2 O=H_3 O^{+}+SO_4^{2-} \end{array}$ Since it forms hydronium ion with water, i.e., it donates $H ^{+}$ion. Therefore, it is acidic in nature. Also, it donates two $H ^{+}$in two stages; therefore, it is dibasic in nature. Hence, sulphuric acid is a dibasic acid.
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