Tobacco smoke contains carbon monoxide, which

Reduces the oxygen-carrying capacity of blood

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Causes gastric ulcers

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Raises blood pressure

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Is carcinogenic

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Solution

The correct option is A Reduces the oxygen-carrying capacity of blood
Tobacco smoke ha 2-6% CO.The inhaled concentration is 400 ppm.The gas combines with haemoglobin and forms an stable complex called carboxyhaemoglobin (COHb), thus reducing the concentration of haem bound oxygen.This causes oxygen deficiency in body.
So, the correct answer is 'Reduces the oxygen-carrying capacity of blood'

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Similar questions

Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent?

(a) carbon dioxide

(b) nitrogen monoxide

(d) sulphur dioxide

Sulphur dioxide	a	1	Damage ozone layer
Carbon dioxide	b	2	Reduces the oxygen- carrying capacity of the blood
Carbon monoxide	c	3	Acid rain
Chlorofluoro-carbons	d	4	Greenhouse gas

Choose the correct option for the following given statements;

Statement 1: Carbon monoxide is a harmful air pollutant.

Statement 2: Carbon monoxide increases the oxygen absorption capacity of the blood.

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