The two forms of oxygen, o2(g) and o3(g), have
(1) different molecular structures and identical properties
(2) different molecular structures and different properties
(3) identical molecular structures and identical properties
(4) identical molecular structures and different properties

option (2) different molecular structures and different properties.


Justification:


O₂(g) and O₃(g) are different forms of oxygen in gaseous state. That is what is called allotropes.


Allotropes are forms of the same element, in the same physical state (solid, liquid or gas), that have different structures and different properties.


O₂ (diatomic oxygen) and O₃ (ozone) are both gases at room temperature, but one molecule has 2 atoms and the other has 3 atoms. That make them different in structure and properties.


Another example of allotropes is graphite and diamonds.

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different.  let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones).  now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first.  for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours.  so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia.