Question

Smoke of tobacco usually contains:

(i) Alcohol	(ii) Nicotine
(iii) Phenol	(iv) Tar

A. (i) and (ii) 
B. (i), (ii), and (iii)
C. (ii), (iii) and (iv)
D. All of the above

Answer 1

Hint: Smoke comes from the combustion of a tobacco product and smoke that is exhaled by smokers. Inhaling environmental tobacco smoke is known as passive or involuntary smoking. Smoking causes lung cancer. Lung cancer is characterised by uncontrollable cell growth within the tissues of the lung.

Complete step-by-step answer:

Tobacco is produced from leaves of tobacco plants. It includes nicotine, which is an addictive drug. When humans smoke tobacco in cigars, cigarettes, or pipes, they absorb toxic and cancer-causing chemical substances that affect their health. Tobacco smoke is a complex combination of several thousand chemical compounds (some in extremely small amounts) that are the product of burning constituents of the tobacco product. The main components of tobacco smoke which are most probable to cause disease are tar, nicotine, carbon monoxides, and polycyclic aromatic compounds. The chemicals in tobacco smoke cause damage to the sensitive lining of the lungs and can cause long-lasting damage that reduces the ability of the lungs to exchange air efficiently.
Alcohols are those organic mixtures that are characterised by the presence of one, two, or more hydroxyl groups (−OH) that are linked to the carbon atom in a hydrocarbon chain or an alkyl group.

Therefore the correct answer is Option C.
Note: Tobacco smoke contains several chemicals that are harmful to non-smokers and smokers. Breathing even tiny amounts of tobacco smoke can be dangerous. Of the more than 7,000 chemicals in tobacco smoke, a minimum of 250 are malignant, including carbon monoxide, hydrogen cyanide, and ammonia.