Photochemical reaction

What is the most important thing in Photochemical reaction?

• Light

• temperature

• pressure

• catalyst

Photochemical reaction is

• A reaction which is catalyzed by light or dependent on light for the reaction to occur

• A reaction which is catalyzed by catalyst or dependent on catalyst for the reaction to occur

• A reaction which is reacted by additional chemical substance or dependent on that substance for the reaction to occur

• A reaction which is independent on light for the reaction to occur

What will happen if the intensity of light shined to the photochemical reaction low ?

• get faster

• get slower

• remain constant

• nothing happen

what is the role of using light in photochemical reaction ? (it can be more than 1 answers)

• catalyst

• preservative

• flavor

• energy

Which one is example of photochemical reaction? (it could be more than one answers)

• the use of silver salts in photography

• Polymerization

• chromatography

• Photosynthesis

In the use of silver salts in phottography, what substance covering in the layer of film ?

• CuBr

• FeBr

• AgBr

• AgCl

When light hits on the film of photography, Some of the silver bromide decomposes to ...... and .....

• Ag and Cl

• Ag and Br

• Fe and Cl

• Cu and Br

what color appears when light hits the film in the high intensity condition ?

• white

• dark grey

• light grey

• colourless

what color appears when light hits the film in the low intensity condition ?

• white

• dark grey

• light grey

• black

in the photography, there exists redox reaction on silver and bromide. which statement is true ?

• Silver ion gets reduced and bromide ion is oxidized

• Bromide ion gets reduced and silver ion is oxidized

• Silver gets reduced and bromide is oxidized