Question

The incomplete combustion of firewood in homes produces a very poisonous gas X. When inhaled, gas X combines with the substance Y present in blood and reduces the capacity of blood to carry gas Z causing respiratory problems and suffocation. What are X, Y and Z?

Answer 1

X = carbon monoxide CO

Y = haemoglobin

Z = Oxygen

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Answer 2

X = Carbon monoxide

Y = Haemoglobin

Z = Oxygen

Explanation:

• Carbon monoxide is a poisonous gas and inhalation of this gas causes brain dead.
• Haemoglobin is a blood cell and it is red in colour. This protein helps the blood to carry oxygen to all part of the body.
• When carbon monoxide reacts with oxygen in the blood, it produces carbon dioxide which causes suffocation and lack to oxygen causes brain dead.
• The chemical reaction given below:

$2 C O+O_{2} \rightarrow 2 C O_{2}$