Question

i. Combustion of coke is a combination reaction. CO2 is not a pollutant. Then why is
combustion of coke harmful?
ii. Which reaction followed by two combination reactions are involved in white wash
of walls?
iii. Give one use of tin plating in daily life.
iv. How photochemical reactions have played an important role in photography?​

Answer 1

Answer:

i. becz it increases the concentration of CO2 in the atmosphere causes global warming

ii. A solution of slaked lime produced by the reaction is used for white washing walls. Calcium hydroxide reacts slowly with the carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Calcium carbonate is formed after two to three days of white washing and gives a shiny finish to the walls.

iii.The tin plating process is used for various purposes,but the most common use of tin plating is to produce a corrosion proof metal surface which is very useful in our daily lifestyle. The tin plated corrosion resistance is effective,cheap and light weight which is ideal for daily usage.

iv.Photography involves a photochemical process which converts silver bromide to metallic silver by the action of photochemical reaction. ... On exposure to light silver bromide is decomposed to metallic silver and it preserves the photographic image

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