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23. _______________ is an example of a dialdehyde compound.

25. A positively charged particle in the nucleus of an atom is called:

19. The chemical process in which a substance is broken down by the addition of water.

8. This physical property is the ratio of the mass of a substance to its volume:

4. Formaldehyde in a dry powdered form is also known as:

8. The general formula R-OH identifies as:

24. Which of the following is NOT a chemical change?

22. What is the basic unit of all aromatic compounds?

18. Ether is a very flammable and can form some explosive mixtures with air. Its general formula is:

17. Amides are derived from the dehydration of organic acids and ammonia. What is its general formula?