Question

write about carbon dioxide.......

Answer 1

Answer:

Carbon dioxide (chemical formula CO

2) is a colorless gas with a density about 60% higher than that of dry air. Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas. The current concentration is about 0.04% (410 ppm) by volume, having risen from pre-industrial levels of 280 ppm.[8] Natural sources include volcanoes, hot springs and geysers, and it is freed from carbonate rocks by dissolution in water and acids. Because carbon dioxide is soluble in water, it occurs naturally in groundwater, rivers and lakes, ice caps, glaciers and seawater. It is present in deposits of petroleum and natural gas. Carbon dioxide is odorless at normally encountered concentrations, but at high concentrations, it has a sharp and acidic odor.[1] At such concentrations it generates the taste of soda water in the mouth.

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Answer 2

Answer:

Carbon dioxide from the air is taken through the tiny pores present on the lower surface of the leaves. These pores are known as stomata. The stomata are surrounded by a pair of guard cells that control the opening and closing of stomata.