C10 Chemistry of the environment

What is the chemical test for the presence of water using anhydrous cobalt(II) chloride?

• It turns blue

• It turns pink

• It turns green

• It turns yellow

Why is distilled water used in practical chemistry rather than tap water?

• It is cheaper

• It is more readily available

• It contains fewer chemical impurities

• It has a better taste

What is the approximate composition of clean, dry air?

• 78% oxygen, 21% nitrogen

• 78% nitrogen, 21% oxygen

• 50% nitrogen, 50% oxygen

• 60% nitrogen, 40% oxygen

Which gas is produced from the complete combustion of carbon-containing fuels?

• Carbon monoxide

• Methane

• Carbon dioxide

• Sulfur dioxide

What is a major source of carbon monoxide in the atmosphere?

• Decomposition of vegetation

• Incomplete combustion of carbon-containing fuels

• Combustion of fossil fuels

• Livestock farming

Which air pollutant is associated with increased global warming due to higher levels of carbon dioxide?

• Carbon monoxide

• Methane

• Particulates

• Oxides of nitrogen

What is one strategy to reduce the effects of climate change?

• Increasing use of fossil fuels

• Planting trees

• Increasing livestock farming

• Reducing renewable energy use

How can the effects of acid rain be reduced?

• Increasing sulfur dioxide emissions

• Using high-sulfur fuels

• Using low-sulfur fuels

• Increasing fossil fuel use

What is the role of catalytic converters in car engines?

• Increase fuel efficiency

• Remove oxides of nitrogen

• Increase engine power

• Reduce carbon dioxide emissions

Which gas is a toxic gas associated with car engines?

• Carbon dioxide

• Methane

• Carbon monoxide

• Sulfur dioxide