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प्रश्न
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
जोड़ियाँ मिलाइएँ
उत्तर
| i. | Silica | b. | Sand |
| ii. | Potassium hydroxide | a. | Caustic potash |
| iii. | Sodium hydroxide | d. | Caustic soda |
| iv. | Zinc carbonate | c. | Calamine |
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