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gokkuminichi9
2 năm trước
Câu 19. Kim loại X tác dụng với H2SO4 loãng giải phóng khí Hidro. Dẫn toàn bộ lượng hidro trên qua ống nghiệm chứa oxit, nung nóng thu được kim loại Y. Hai chất X, Y lần lượt là: `A.\ Ca` và `Zn` `B.\ Mg` và `Ag` `C.\ Na` và `Mg` `D.\ Zn` và `Cu`
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