Photochemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Photochemical Reactions starts at 10 and continues till grade 12.
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A solution of chlorine in water is exposed to sunlight and oxygen is evolved. Write the balanced chemical equation for this photochemical reaction.
Describe the difference between a photochemical and a thermal reaction.
Describe the effect of wavelength of light on the rate of a photochemical reaction.
Describe the importance of photochemical reactions in the synthesis of vitamin D in the human body.
Explain the role of chlorophyll in the photochemical reaction of photosynthesis.
Explain the term 'photosensitizer' in photochemical reactions.
A photochemical reaction has a quantum yield of 0.5. If 2 × 1020 photons are absorbed, how many molecules react?
A solution of chlorine in water is exposed to sunlight and oxygen is evolved. Write the balanced chemical equation for this photochemical reaction.
Which law states that each molecule absorbs one quantum of light in a photochemical reaction? (1) Grotthuss-Draper Law, (2) Stark-Einstein Law, (3) Hess's Law, (4) Dalton's Law
Which law states that only the light absorbed by a system can bring about a photochemical change? (1) Beer-Lambert Law, (2) Grotthuss-Draper Law, (3) Hess's Law, (4) Le Chatelier's Principle
Which of the following factors does NOT affect the rate of a photochemical reaction? (1) Intensity of light, (2) Wavelength of light, (3) Temperature, (4) Pressure of inert gas
Which of the following is a primary photochemical process? (1) Fluorescence, (2) Absorption of light, (3) Phosphorescence, (4) Emission of heat
Fill in the blank: The minimum amount of energy required to initiate a photochemical reaction is called the _______.
Fill in the blank: The photochemical reaction 2AgCl(s) → 2Ag(s) + Cl2(g) is used in _______.
Fill in the blank: The photochemical reaction 2HI(g) → H2(g) + I2(g) requires _______ as a source of energy.
Fill in the blank: The photochemical reaction between ethylene and chlorine produces _______ as the main product.
True or False: All photochemical reactions require a catalyst to proceed.
True or False: In a photochemical reaction, the reactants must absorb light of a specific wavelength to undergo a chemical change.
True or False: Photochemical reactions can occur in the absence of light.
True or False: The energy of a photon is directly proportional to its wavelength.
