Discussion
Match the following and select the correct answer from the codes given below :
| Nature of Hazardous Substance | Example |
|---|---|
| (a) Ignitible | (i) Lead salts |
| (b) Corrosive | (ii) Polyaromatic hydrocarbons |
| (c) Carcinogenic | (iii) Sulphuric acid |
| (d) Toxic | (iv) White phosphorous |
Answer: B
The match is a-iv, b-iii, c-ii, d-i.
- Ignitable: white phosphorus, which catches fire spontaneously in air.
- Corrosive: sulphuric acid, which destroys tissue and metal.
- Carcinogenic: polyaromatic hydrocarbons, such as benzo(a)pyrene, known to cause cancer.
- Toxic: lead salts, which poison the nervous system and blood.
Sulphuric acid is the clear corrosive, and only option B pairs corrosive with it (b-iii). Options A and D call white phosphorus corrosive, and option C pairs ignitable with lead salts.
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