Compared with clouds, fogs are a. colder b. of a different composition c. at lower altitudes d. drier

Option (C) is the correct answer.

Explanation:

Clouds are basically condensed vapors and they can be formed at different altitudes and height.

For example, typically clouds appear between 6,500 feet to 20,000 feet.

Whereas when tiny droplets are suspended into the atmosphere then it is known as fog. And fog, generally appears at lower altitude than clouds.

Therefore, we can conclude that compared with clouds, fogs are at lower altitudes.

h let me think

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .