Air quality and climate：練習題

Which gas makes up approximately 78% of clean, dry air?

Which strategy is specifically used to reduce the amount of sulfur dioxide released into the atmosphere from power stations?

A sample of clean, dry air contains several gases. Which statement correctly identifies the order of abundance (from most to least) and a correct property of one of these gases?

Which process is a major source of sulfur dioxide in the atmosphere?

Which is the correct balanced symbol equation for photosynthesis?

State the names of the two most abundant gases in clean, dry air and provide their approximate percentages by volume.

Explain why carbon monoxide is classified as a toxic gas in the context of human health.

Describe the mechanism by which greenhouse gases such as carbon dioxide and methane cause global warming.

The Earth's atmosphere consists of a mixture of gases.
(a) State the approximate percentages by volume of the following gases in clean, dry air:
i. Nitrogen, \( \text{N}_2 \)
ii. Oxygen, \( \text{O}_2 \)
iii. The mixture of noble gases and carbon dioxide.
(b) Name one air pollutant produced from the incomplete combustion of carbon-containing fuels.

Photosynthesis is a vital process that regulates the levels of carbon dioxide and oxygen in the atmosphere.
(a) Write the word equation for photosynthesis.
(b) State the two essential conditions required for this reaction to occur in plants.
(c) Write the balanced symbol equation for photosynthesis.