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Which of the following oxide is amphoteric ?(a) SnO2 (b) CaO (c) SiO2 (d) CO2 |
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Answer» (a) SnO2 is an amphoteric oxide because it reacts with acids as well as with bases to form corresponding salts. SnO2 + 2H2 SO4 (conc) → Sn(SO4 ) 2 + 2H2O , SnO2 + 2NaOH → Na2 SnO3 + H2O |
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