#1
Which of the following is an example of a chemical reaction?
Burning of wood
ExplanationCombustion reactions involve the burning of a substance, such as wood.
#2
What is the chemical formula for water?
H2O
ExplanationThe chemical formula for water is H2O, indicating two hydrogen atoms and one oxygen atom.
#3
What is the chemical symbol for iron?
Fe
ExplanationThe chemical symbol for iron is Fe.
#4
Which gas is commonly known as laughing gas?
Nitrous oxide
ExplanationNitrous oxide is commonly known as laughing gas.
#5
Which of the following is an example of a combustion reaction?
Burning of gasoline
ExplanationThe burning of gasoline is an example of a combustion reaction, producing heat and light.
#6
Which gas is responsible for the depletion of the ozone layer?
Chlorofluorocarbons (CFCs)
ExplanationChlorofluorocarbons (CFCs) are known for causing ozone layer depletion.
#7
What is the primary environmental impact of acid rain?
Corrosion of buildings and monuments
ExplanationAcid rain leads to the corrosion of buildings and monuments due to its acidic nature.
#8
What type of reaction is photosynthesis?
Redox
ExplanationPhotosynthesis is a redox (oxidation-reduction) reaction, involving the transfer of electrons.
#9
Which pollutant is primarily responsible for smog formation?
Nitrogen oxides
ExplanationNitrogen oxides are the primary pollutants responsible for smog formation.
#10
Which greenhouse gas has the highest global warming potential?
Methane
ExplanationMethane has a high global warming potential, contributing significantly to climate change.
#11
Which chemical compound is responsible for ocean acidification?
Carbon dioxide
ExplanationCarbon dioxide contributes to ocean acidification, altering the pH of seawater.
#12
What is the chemical formula for ozone?
O3
ExplanationThe chemical formula for ozone is O3, consisting of three oxygen atoms.
#13
Which chemical compound is primarily responsible for the greenhouse effect?
Carbon dioxide
ExplanationCarbon dioxide is the primary greenhouse gas responsible for the greenhouse effect.
#14
Which of the following is a greenhouse gas with the highest concentration in the Earth's atmosphere?
Water vapor
ExplanationWater vapor is the most abundant greenhouse gas in the Earth's atmosphere.
#15
Which of the following is a greenhouse gas with the strongest infrared absorption capability per molecule?
Sulfur hexafluoride
ExplanationSulfur hexafluoride has the strongest infrared absorption capability per molecule among greenhouse gases.