SCIENCE
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- Question 1 of 5
1. Question
1 pointsBrass gets discoloured in air because of the presence of which of the following gases in air?
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2. Question
1 pointsWhich of the following is a non metal that remains liquid at room temperature?
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3. Question
1 pointsChlorophyll is a naturally occurring chelate compound in which central metal is
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4. Question
1 pointsWhich of the following is used in pencils?
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5. Question
1 pointsWhich of the following metals forms an amalgam with other metals?
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