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JEE Main levelSingle correct optionDifficulty 2 of 3pb014

Which one of the following oxides is amphoteric?

A $CO$
B $SiO X_{2}$
C $SnO X_{2}$
D $CO X_{2}$

Answer: C

CO

is neutral, while

CO X_{2}

and

SiO X_{2}

are acidic.

SnO X_{2}

reacts with both acids and bases (forming stannate and stannic salts), so it is amphoteric.

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