Photochemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Photochemical Reactions starts at 10 and continues till grade 12.
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Describe one industrial application of photochemical reactions.
Describe the importance of photochemical reactions in the environment.
Describe the role of chlorophyll in photosynthesis.
Explain why photochemical reactions are generally faster than thermal reactions at room temperature.
Explain why photochemical reactions are important in the atmosphere.
Explain why photochemical reactions are used in photography.
Explain why silver chloride turns grey in sunlight.
State one difference between a thermal decomposition reaction and a photochemical decomposition reaction.
Which of the following is a necessary condition for a photochemical reaction? (1) Presence of light, (2) High temperature, (3) High pressure, (4) Presence of a base
Which of the following is a photochemical decomposition reaction? (1) 2AgCl (s) → 2Ag (s) + Cl2 (g), (2) 2H2O (l) → 2H2 (g) + O2 (g) by electrolysis, (3) C + O2 → CO2, (4) NaOH + HCl → NaCl + H2O
Which of the following is a photochemical reaction that occurs in the atmosphere? (1) Formation of ozone, (2) Combustion of coal, (3) Melting of ice, (4) Boiling of water
Which of the following is a photochemical reaction? (1) Decomposition of calcium carbonate by heat, (2) Decomposition of silver chloride by sunlight, (3) Reaction of sodium with water, (4) Neutralization of HCl and NaOH
Fill in the blank: The chemical formula for silver chloride is __________.
Fill in the blank: The decomposition of silver bromide in sunlight is used in __________ photography.
Fill in the blank: The decomposition of silver bromide in sunlight produces silver and __________ gas.
Fill in the blank: The minimum amount of energy required to initiate a photochemical reaction is called __________ energy.
True or False: All chemical reactions require light to proceed.
True or False: All decomposition reactions are photochemical reactions.
True or False: Photochemical reactions can be used to purify water by breaking down pollutants using sunlight.
True or False: Photochemical reactions can occur in the absence of light.
