Chemistry
Which one of the following elements is least likely to be found in commercial fertilisers?

Phosphorous
Nitrogen
Potassium
Silicon

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Chemistry
Man dies in the atmosphere of CO, because it

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

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