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Q.

Which substance is used in black and white photography?

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a

AgNO3

b

Ag Br

c

HBr

d

None

answer is A.

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Detailed Solution

AgBr is used in black and white photography. AgBr decomposes on exposure to light due to which the light-exposed area turns black and the non-exposed area remains white.

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Which substance is used in black and white photography?