IMAT 2015 Q51 [Acidic Solutions]

IMAT Past Papers Solutions
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1

Which two of the following oxides would NOT give acidic solutions in water?

CO, CO_2, SO_2, NO

A. NO and SO_2
B. NO and CO_2
C. CO and SO_2
D. CO and CO_2
E. CO and NO

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  1. CO (g) + H_2O (l) → CO_2 (g) + H_2 (g)
    This is not an acidic solution in water.

  2. CO_2 + H_2O → H_2CO_3
    This produces carbonic acid and is so obviously an acidic solution in water.

  3. SO_2 (aq) + H_2O (l) → H_2SO_4 (aq)
    This produces sulphuric acid, which is also an acidic solution in water.

  4. 4 NO (g) + 6 H_2O (l) → 5 O_2 (g) + 4 NH_3 (aq)
    This is not an acidic solution in water.

Therefore the answer is NO and CO, option E.