Question
| i | Silica | (a) | Caustic potash |
| ii | Potassium hydroxide | (b) | Sand |
| iii | Sodium hydroxide | (c) | Calamine |
| iv | Zinc carbonate | (d) | Caustic soda |
✓
Answer
i. b
ii. a
iii. d
iv. c
ii. a
iii. d
iv. c
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