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Which of these statements about carbon monoxide (CO) is accurate?

1. CO serves as a significant fuel source.
2. CO is a toxic gas and exhibits neutral oxide properties.
3. CO can be synthesized by removing water from formic acid using concentrated sulfuric acid.
4. All the given statements are incorrect.

Correct answer: CO is a toxic gas and exhibits neutral oxide properties.

Solution

Carbon monoxide is highly toxic and is classified as a neutral oxide. It does not show acidic or basic oxide behavior, so the second statement is correct.

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