TR NG THCS ĐI TƯỜ Ạ Ự
H và tên:.........................................ọ
L p:...ớ
BÀI KI M TRA GI A KÌ II – NH 2020-2021Ể Ữ
MÔN: HÓA 8 (Th i gian 45 phút)ờ
Đi mể L i phê c a cô giáoờ ủ
Đ I:Ề
Ph n I: TR C NGHI M:ầ Ắ Ệ Khoanh vào đáp án đúng nh t:ấ
Câu 1: Dãy các oxit sau là oxit axit
A. K2O, CuO, CaO, SO2 B. K2O, CO2, N2O5, SO2
C. CO2, N2O5, SO3, SO2 D. K2O, CuO, CaO, MgO
Câu 2: Ch t đc dùng đ đi u ch oxi trong phòng thí nghi m là.ấ ượ ể ề ế ệ
A. KClO3 và KMnO4 B. KClO3 và CaCO3
C. KMnO4 và H2O D. KMnO4 và không khí
Câu 3: Ng i ta thu khí oxi b ng cách đy n c là d a vào tính ch tườ ằ ẩ ướ ự ấ
A. khí oxi ít tan trong n c B. khí oxi tan trong n cướ ướ
C. khí oxi khó hóa l ng D. khí oxi nh h n n cỏ ẹ ơ ướ
Câu 4: Quá trình nào d i đây ướ không làm gi m l ng oxi trong không khí?ả ượ
A. S g c a các v t d ng b ng s t B. S cháy c a than, c i, b p gaự ỉ ủ ậ ụ ằ ắ ự ủ ủ ế
C. S quang h p c a cây xanh D. S hô h p c a đng v tự ợ ủ ự ấ ủ ộ ậ
Câu 5: Ph n ng nào d i đây là ph n ng hoá h pả ứ ướ ả ứ ợ
A. CuO + H2 -> Cu + H2O B. CaO +H2O -> Ca(OH)2
C. K2MnO4 -> K2MnO4 + MnO2 + O2 D. CO2 + Ca(OH)2-> CaCO3 +H2O
Câu 6 : S tác d ng c a oxi v i m t ch t g i là :ự ụ ủ ớ ộ ấ ọ
A. s th B . s cháy C. s đt nhiên li uự ở ự ự ố ệ D. s oxi ự
hóa
PH N II: T LU NẦ Ự Ậ
Câu 7: Hoàn thành các PTP sau:Ư
a) ......+ ...... Al2O3 c)......+...... Al2S3
b) KClO3 .... + .... d) HgO .....+ ....
Câu 8: Đt cháy 3,1g ph t pho trong m t bình ch a 25,2 lít khí Oố ố ộ ứ 2 nguyên ch t ( ấ ở
đktc). thu đc điphotphopentaoxitượ
a) Ch t nào d ? và d bao nhiêu gam?ấ ư ư
b) Tính kh i l ng s n ph m thu đc?ố ượ ả ẩ ượ
Câu 9: Khí axetilen C2H2 cháy sinh ra khí cacbonic và h i n c đng th i t a nhi t ơ ướ ồ ờ ỏ ệ
a)Vi t PTPế Ư
b)Tính V không khí c n dùng đ đt cháy h t 11,2 lít khí axetilen trên( Bi t Vầ ể ố ế ế oxi=1/5
Vkk)
BÀI LÀM
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