Bài kiểm tra lần 2 môn: Hoá học lớp: 9

A-Trắc nghiệm (2điểm)

 Hãy chọn câu trả lời đúng bằng cách khoanh tròn vào một trong các chữ cái A,B,C hoặc D.

1. Để phân biệt dd H2SO4 và dd NaCl mất nhãn ta có thể dùng:

A. dd BaCl2 B. dd Na2CO3 C. Quỳ tím D. Cả A,B,C đều đúng.

2. Điều kiện của phản ứng trao đổi trong dd là:

A. sản phẩm tạo thành có chất khí.

B. sản phẩm tạo thành có chất không tan (ít tan).

C. sản phẩm tạo thành có chất không tan (ít tan) hoặc chất khí.

D. cả A,B,C đều sai.

3) Các chất sau đây chất nào cùng tồn tại trong dung dịch?

 

a) KCl và NaNO3

b) CuSO4 và NaOH c) H2CO3 và ZnSO4

d) FeCl3 và Ca(OH)2

 

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c chất sau: Sắt (Fe), Natri (Na), axit clohiđric (HCl) và nước (H2O). Hãy viết các PTPƯHH để điều chế ra: Sắt (II) hiđroxit: [Fe(OH)2] 
	(Cho: Ba = 137 ; O = 16 ; H = 1 ; Na = 23 ; S = 32 )
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