1.Brass gets discoloured in air because of the presence of which of the following gases in air?
2.
Chlorophyll is a naturally occurring chelate compound in which central metal is
A. copper
B. magnesium
C. iron
D. calcium
3.
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Answer:
1.Brass gets discoloured in air because of the presence is Hydrogen sulphide
2. magnesium (Option B)
question number 3 is incomplete. and as well as 1
Explanation:
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