Discussion
Match the following :
| List - I | List - II |
|---|---|
| (I) Tempered glass | 1. Metallic oxides |
| (II) Borosilicate glass | 2. Molten rock |
| (III) Coloured glass | 3. Dice formation |
| (IV) Rock wool | 4. Constituents \(B_{2}O_{3}\) |
Codes :
(I) (II) (III) (IV)
Answer: C
The correct matching is tempered glass with dice formation, borosilicate glass with the constituent boron trioxide, coloured glass with metallic oxides, and rock wool with molten rock. This is code C, 3 4 1 2. Tempered glass breaks into small blunt pieces like dice. Borosilicate contains \(B_{2}O_{3}\). Metal oxides colour glass. Rock wool is spun from molten rock.
Option A, B and D give tempered glass molten rock or metallic oxides, which is wrong because they do not describe the way it breaks.
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