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NEET 2011

Exam: NEET
Year: 2011
Subject: Chemistry
Chapter: Classification of Elements and Periodicity in Properties

NEET 2011 · Chemistry · Classification of Elements and Periodicity in Properties

Which of the following oxide is amphoteric?

Which of the following oxide is amphoteric?

Options

A $\mathrm{SnO}_2$
B $\mathrm{CaO}$
C $\mathrm{SiO}_2$
D $\mathrm{CO}_2$

Correct answer

A. $\mathrm{SnO}_2$

Step-by-step solution

\mathrm{SnO}_2is an amphoteric oxide because it reacts with

acids as well as bases to form corresponding salts.

\begin{aligned} \mathrm{SnO}_{2}+4 \mathrm{HCl} \longrightarrow \mathrm{SnCl}_{4}+2 \mathrm{H}_{2} \mathrm{O}\\ & \mathrm{SnO}_{2}+2 \mathrm{NaOH} \longrightarrow \begin{array}{c} \mathrm{Na}_{2}\mathrm{SnO}_{3}+\mathrm{H}_{2}\mathrm{O}\\ \text{ sod. stannate } \end{array} \end{aligned}

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