Đề kiểm tra 1 tiết số 2 môn: Hóa học 9

A. Trắc nghiệm : (3điểm ).

Câu I. Khoanh tròn vào một trong các chữ cái a,b,c,d đứng trước câu trả lời đúng.

1.Phản ứng xảy ra giữa KOH và dung dịch HCl được gọi là:

a. Phản ứng thế b. Phản ứng phân huỷ

c. Phản ứng trung hoà d. Phản ứng hoá hợp

 2. Dung dịch nào dưới đây làm quì tím hĩa xanh

 a.Dung dịch H2SO4 b. Dung dịch K2SO4

 c. Dung dịch NaNO3 d. Dung dịch Ba(OH)2

 3. Dung dịch KOH làm đổi màu dung dịch phenolphtalein thành màu:

 a. Vng b. Đỏ

 c. Xanh d. Tím

Câu II . Khoanh tròn vào chữ Đ ở câu đúng và chữ S ở câu sai .

 1. Dung dịch AgNO3 dùng để nhận biết được dung dịch NaCl. Đ S

2. Tất cả những phn bĩn hố học: KCl, NH4NO3, Ca(H2PO4)2 ,Ca(H2PO4)2, KNO3,

(NH4)2HPO4 đều là phân bón đơn. Đ S

3. Dung dịch H2SO4 dùng để nhận biết được dung dịch BaCl2. Đ S

 

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i dung dịch H2SO4 20% ( lượng vừa đủ).
1. Tính khối lượng muối thu được.
 2. Tính khối lượng dung dịch H2SO4 cần dùng. 
 ( Cho: Ca = 40 ; S = 32 ; O = 16 ; H = 1).
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