An oxide X of carbon on treatment with oxygen gives Y which turns lime water milky and blue litmus to red. Predict the valencies of carbon in X and Y and what is the composition of milky precipitate formed?

Explanation

To solve the problem, we need to analyze the information given step by step.

### Step 1: Identify the Oxide X of Carbon
The question states that oxide X of carbon reacts with oxygen to form substance Y. We know that common oxides of carbon include carbon monoxide (CO) and carbon dioxide (CO2).

**Hint:** Think about the common oxides of carbon and their reactions with oxygen.

### Step 2: Determine the Product Y
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