Discussion
Match the following :
| Group of Corrosive Substance | Example |
|---|---|
| (a) Strong acids | (1) Bromine trifluoride |
| (b) Strong alkali | (2) Oxygen difluoride |
| (c) Strong oxidants | (3) Sulphuric acid |
| (d) Strong dehydrating agents | (4) Potassium hydroxide |
Answer: A
The correct matching is (a)-(3), (b)-(4), (c)-(2), (d)-(1).
- Sulphuric acid is the classic strong acid: (a)-(3).
- Potassium hydroxide (caustic potash) is a strong alkali: (b)-(4).
- Oxygen difluoride, OF2, is a powerful oxidising and fluorinating agent: (c)-(2).
- Bromine trifluoride, BrF3, reacts violently with water and is placed among the strong dehydrating agents in this classification: (d)-(1).
The first two pairs settle the answer, since only one code puts sulphuric acid with the acids and potassium hydroxide with the alkalis. The other codes call sulphuric acid an oxidant or an alkali, or match potassium hydroxide with dehydrating agents.
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