Bài ôn tập Kiểm tra học kỳ II môn Hóa học 10 nâng cao - Nguyễn Văn Thiện
Bài 1: Trong phản ứng: NO2 + H¬2O HNO3 + NO
Thì chất NO2 đống vai trò:
a. Là chất khử b. Là chất Oxi hoá, đồng thời cũng là chất khử.
c. Là chất Oxi hoá d. Không là chất Oxi hoá và cũng không phải là chất khử.
Bài 2: Cho phản ứng: Na + Cl2 NaCl
Trong phản ứng này nguyên tử Na.
a. Bị Oxi hoá. c. Không bị Oxi hoá, không bị khử
b. Bị khử d. Vừa bị Oxi hoá vừa bị khử.
Bài 3: Hãy cho biết dấu hiệu nhận biết một phản ứng Oxi hoá khử.
a. Tạo ra chất khí. c. Có sự thay đổi số oxi hoá của một nguyên tố.
b. Tạo ra chất kết tủa. d. Có sự thay đổi màu sắc của các chất.
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