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Grade 11 Exam  >  Grade 11 Tests  >  Chemistry for Grade 11 (IGCSE)  >  Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Grade 11 MCQ

Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Grade 11 MCQ


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15 Questions MCQ Test Chemistry for Grade 11 (IGCSE) - Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases

Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases for Grade 11 2024 is part of Chemistry for Grade 11 (IGCSE) preparation. The Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases questions and answers have been prepared according to the Grade 11 exam syllabus.The Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases MCQs are made for Grade 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases below.
Solutions of Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases questions in English are available as part of our Chemistry for Grade 11 (IGCSE) for Grade 11 & Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases solutions in Hindi for Chemistry for Grade 11 (IGCSE) course. Download more important topics, notes, lectures and mock test series for Grade 11 Exam by signing up for free. Attempt Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases | 15 questions in 15 minutes | Mock test for Grade 11 preparation | Free important questions MCQ to study Chemistry for Grade 11 (IGCSE) for Grade 11 Exam | Download free PDF with solutions
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 1
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How are oxides of nitrogen primarily formed in car engines and blast furnaces?

Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 1
Oxides of nitrogen are primarily formed in car engines and blast furnaces by the reaction of nitrogen with oxygen under high pressure and temperature conditions. This reaction leads to the formation of NO and NO2, which are harmful pollutants.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 2
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What is the role of catalytic converters in car exhaust systems?

Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 2
Catalytic converters in car exhaust systems play a crucial role in decreasing the emission of harmful gases by facilitating various redox reactions that convert pollutants like carbon monoxide and oxides of nitrogen into less harmful substances like carbon dioxide and nitrogen gas.
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Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 3
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What is the composition of catalytic converters used in cars?

Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 3
Catalytic converters used in cars are composed of transition metal catalysts, such as platinum and rhodium. These metals serve as catalysts to promote the conversion of harmful pollutants in exhaust gases into less harmful substances.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 4
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How do catalytic converters help in reducing the pollution from car exhausts?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 4
Catalytic converters help in reducing pollution from car exhausts by facilitating chemical reactions that convert harmful pollutants like carbon monoxide and oxides of nitrogen into less harmful gases such as carbon dioxide, nitrogen gas, and water vapor. This process aids in mitigating the environmental impact of vehicle emissions.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 5
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What is the primary role of chlorophyll in the process of photosynthesis?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 5
Chlorophyll plays a critical role in photosynthesis by capturing light energy essential for the process to occur. This pigment, found in chloroplasts, absorbs light energy, which is then utilized to convert carbon dioxide and water into glucose, the primary energy source for plants. This process is fundamental for plant growth and development.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 6
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What are the main reactants involved in the process of photosynthesis?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 6
In photosynthesis, the main reactants are carbon dioxide and water. These substances are transformed through the process into glucose, the energy source for plants, and oxygen as a byproduct. This conversion is driven by light energy captured by chlorophyll, highlighting the interconnected steps in this essential biological process.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 7
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What is the key function of light energy in the process of photosynthesis?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 7
Light energy in photosynthesis serves the vital function of driving the chemical reactions that transform carbon dioxide and water into glucose and oxygen. This energy, captured by chlorophyll, is instrumental in facilitating the conversion process essential for plant survival and growth.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 8
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Which type of reaction is photosynthesis considered to be?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 8
Photosynthesis is classified as an endothermic reaction, meaning it absorbs energy from the surroundings to drive the process of converting carbon dioxide and water into glucose and oxygen. This energy, derived from light, is crucial for plants to produce their own food and sustain their growth and metabolic functions.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 9
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What is the balanced symbol equation for photosynthesis?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 9
The balanced symbol equation for photosynthesis is 6CO2 + 6H2O -> C6H12O6 + 6O2. This process involves the conversion of carbon dioxide and water into glucose and oxygen in the presence of sunlight and chlorophyll. It is a crucial process for producing energy-rich molecules that fuel the activities of plants and other organisms in the ecosystem.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 10
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How does the greenhouse effect contribute to keeping the Earth warm?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 10
The greenhouse effect traps thermal energy within the Earth's atmosphere by absorbing and re-emitting it in all directions. This phenomenon helps maintain the Earth's temperature at a level suitable for supporting life. As greenhouse gases like carbon dioxide and methane accumulate in the atmosphere, they enhance this effect, leading to global warming.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 11
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How does the enhanced greenhouse effect differ from the regular greenhouse effect?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 11
The enhanced greenhouse effect, caused by increased concentrations of greenhouse gases from human activities, leads to a higher retention of thermal energy within the Earth's atmosphere. This results in a rise in the average global temperature, a phenomenon known as global warming, which has significant implications for climate change and ecosystems worldwide.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 12
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How does global warming contribute to habitat loss and endanger various species?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 12
Global warming contributes to habitat loss and endangers various species by changing climates, which in turn threatens the habitats of many organisms. This disruption in ecosystems can lead to a loss of biodiversity and an increased risk of extinction for certain species.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 13
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What is one of the consequences of rising water levels due to global warming?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 13
One of the consequences of rising water levels due to global warming is the occurrence of floods in low-lying regions. As glaciers melt and sea levels rise, coastal areas face a higher risk of flooding, which can result in significant damage to infrastructure and displacement of communities.
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 14
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Why is the process of trapping thermal energy within the Earth's atmosphere essential for maintaining Earth's temperature?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 14
Trapping thermal energy within the Earth's atmosphere is crucial for maintaining a habitable environment for life on Earth. This process ensures that the planet retains enough warmth to support various ecosystems and sustain conditions suitable for living organisms.Response:
Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 15
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What happens to the thermal energy emitted from the Earth's surface that is absorbed by greenhouse gases?
Detailed Solution for Test: Reducing the effects of Environmental Issues & Photosynthesis & Greenhouse Gases - Question 15
When greenhouse gases absorb thermal energy emitted from the Earth's surface, they re-emit it in all directions. This process contributes to the trapping of heat within the Earth's atmosphere, playing a crucial role in regulating the planet's temperature.
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