Jupiter
That sounds like a description of Venus.
Your thinking of Venus which does have a high Co2 atmosphere and sulphuric rain. Mars has very little atmosphere.
No. The Martian atmosphere is very thin, but it does consist mainly of carbon dioxide. Venus is the terrestrial planet with a dense atmosphere of carbon dioxide and sulfuric acid.
carbon dioxide
carbon dioxide
Earth's atmosphere is actually composed of about 0.038% carbon dioxide.
Venus
The atmosphere of Venus consists mainly of carbon dioxide, and a small amount of nitrogen. The thick cloud cover is composed of sulfur dioxide and sulfuric acid droplets. Due to the dense atmosphere, the surface temperature ranges from 750 to 930 degrees Fahrenheit (398 to 498 Celsius). The surface pressure is 90 times that of Earth. That's like being one kilometer (more than half a mile) under the ocean.
The atmosphere of Venus is the layer of gases surrounding Venus. It is composed primarily of carbon dioxide and is much denser and hotter than that of Earth.
Venus.
carbon dioxide, nitrogen, sulfuric acid and some other gases
It is composed of a periodic mixture made with carbon dioxide in a greenhouse effect.