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chu de base

Authored by hue minh

Science

2nd Grade

chu de base
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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Chất nào sau đây không phải là base?

NaOH

NaHCO3

Cu(OH)2

Fe(OH)3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Dung dịch chất nào sau đây làm phenolphthalein chuyển sang màu hồng?

HCl, NaCl, NaOH.  

HNO3, Ba(OH)2.   

NaOH, KOH.

H2S, Ca(OH)2.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 Chất nào sau đây bị nhiệt phân hủy tạo thành basic oxide và nước?

A. Ba(OH)2.                               B. Cu(OH)2.                              C. KOH.      D. NaOH.

Ba(OH)2.   

Cu(OH)2.  

KOH.

NaOH.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Dãy các base bị phân hủy ở nhiệt độ cao

Ca(OH)2, NaOH, Zn(OH)2, Fe(OH)3.     

Cu(OH)2, NaOH, Ca(OH)2, Mg(OH)2

Cu(OH)2, Mg(OH)2, Fe(OH)3, Zn(OH)2.    

Zn(OH)2, Ca(OH)2, KOH, NaOH.

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Trung hòa 200ml dung dịch HCl 1,5M bằng V ml dung dịch NaOH 2M vừa đủ. Tính V?

100ml

200ml

150ml

300ml

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