Metal A reacts with oxygen to form an oxide. The oxide is dissolved in water to form a soluble hydroxide. What is the solution formed called and what is metal A

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.