Presence of high concentration of ozone and smog in atmospheric air causes the __________________?
Correct answer: B. Cracking of rubber products
- A. Embrittlement & decrease of folding resistance of paper
- B. Cracking of rubber products
- C. Fading of dye on textiles
- D. Damage of electrical insulator on high tension power line
Explanation
Ozone is a powerful oxidising agent that attacks the unsaturated bonds in rubber, producing surface cracks and loss of elasticity. The other effects can occur with pollutants, but cracking of rubber is the characteristic effect of ozone.
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