Chemistry
Which one of the following organic compound is used to remove stains of iron compounds?

Benzoic acid
Oxalic acid
Cinnamic acid
Phthalic acid

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Chemistry
Man dies in the atmosphere of CO, because it

Dries up the blood
Combines with O2 present in the body
Reduces the organic matter of tissues
Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2

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