Which of the following is True for carbon monoxide.
It is a colourless and odourless gas
Carbon monoxide is toxic in nature
It gives a blue flame when burns in air
It reacts with metals to form metal carbonyls
To answer this question,let's recall the properties of carbon.
1.Carbon monoxide is a colourless and obourless gas.
2.CO is toxic in nature as it reacts with haemoglobin in the blood and forums a comples called carboxyhaeglobin which is about 300 times more stable than the complex formed by the reaction of oxygen(air) and haemoglobin in the lungs.
Haemoglobin + CO → Carboxyhaemoglobin.
Haemoglobin + O2⇌ Oxyhaemoglobin.
This prevents the haemoglobin present in the RBC (red blood cells) from carrying oxygen from the lungs to all parts of the body.This leads to oxygen deficiency causing unconsciousness and ultimately leads to death.
3.In CO molecule , here is one σ and two π bonds between carbon and oxygen because of the presence of lone pair onC,CO acts as a donor and reacts with many metals to form metal carbonyls.
Ni+4CO330−350−−−−−→(Ni(CO)4
Fe+5CO→Fe(CO)5
4.Co is am important fuel,bacuse it involves a considerable amount of heat when it burns in air to give a blue flame.
2CO+O2→2CO2