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प्रश्न
Match the columns.
| Group A | Group B |
| 1. ZnS | a) Copper Sulphide |
| 2. HgS | b) Bauxite |
| c) Cinnabar | |
| d) Zinc blend |
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उत्तर
| Group A | Group B |
| 1. ZnS | d) Zinc blend |
| 2. HgS | c) Cinnabar |
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................................
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…………….
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