Which two of the oxides (CO2, SiO, BeO, NO, ZnO) react neither with KOH nor with HCl?

Answer 1

#CO_2 and NO# most likely. A problem exists in the assumption of reaction conditions.

For example, both of these go through an intermediate form before the actual reaction. The #CO_2# forms carbonic acid/carbonates in water, and THOSE react with a base. The NO is undergoing an auto-redox into #NO_2 and N_2O# before reacting as well. Carbon can form chlorides, but not by reacting with HCl.
The reaction mechanism of #SiCl_4# favors formation of an oxide, so the HCl reaction is unlikely. However, two possible reactions proceed with KOH. #KOH + CO_2 → KHCO_3# #2KOH + CO_2 → K_2CO_3 + H_2O# No reaction with HCl.
The following examples are not SiO, but it would be even more reactive than #SiO_2# #6KOH + 5SiO_2 → K_4SiO_4 + K_2Si_4O_9 + 3H_2O# #4KOH + 2SiO_2 → K_2SiO_3 + K_2Si_4O_5 + 2H_2O# No reaction with HCl.
#BeO + 2KOH → K_2BeO_2 + H_2O# #BeO + 2HCl → BeCl_2 + H_2O#
#ZnO + 2HCl → ZnCl_2 + H_2O# No reaction with KOH. https://tutor.hix.ai

There is no reaction with HCl. At room temperature, potassium hydroxide slowly reacts with nitric oxide to produce potassium nitrite, nitrogen dioxide, and water (https://tutor.hix.ai).

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Answer 2

The two oxides that react neither with KOH nor with HCl are SiO (silicon dioxide) and BeO (beryllium oxide).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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