Sun August 12, 2012 By:
this ques. is for 2 marks....actually mam i'm confused that should i write both the equations one of AgCl and another of AgBr....??
is it necessary to write both of them to gain full marks...???

a light sensitive compound 'x' of silver is used in black and white photography on exposure to sunlight its colour changes to grey. (a) identify 'x'. (b) write a chemical equation to express the above change

Expert Reply
Mon August 13, 2012

a. X is silver bromide.

b. 2AgBr(s) ---(sunlight)----> 2Ag(s) + Br2(g)

c. Its photolytic decomposition reaction.

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