de hoa 8 hkii
DESCRIPTION
De Hoa 8 HKIITRANSCRIPT
kim tra
kim tra HKII ( 1)Mn: Ho hc 8
Thi gian: 45 pht
Cu 1: (3 ) Chn cu tr li ng?
1. Cho 2 nguyn t A v B c ho tr khng i. Cng thc oxit ca A l A2O ; cng thc hp cht ca B vi Hiro l BH3. Cng thc ng ca hp cht to bi A v B l:
A. AB
B. A2B3
C. A3B2
D. A3B
2. Dy cc cht tan c trong nc l:
A. NaOH, CuSO4, H2SO4, Mg(OH)2
C. KOH, HNO3, CaCO3, AlCl3B. KCl, Mg(NO3)2, Ba(OH)2, MgSO4
D. FeCl3, H2SiO3, HCl, Na2CO33. Cc cht lm i mu qu tm l:
A. KOH, NaCl, CaCO3
C. MgO, Cu(OH)2, KOH
B. KOH, Ca(OH)2, HCl
D. KOH, Cu(OH)2, HCl
4. Dy cc CTHH biu din kim l:
A. NaOH, KOH, Ba(OH)2
B. Fe(OH)2, Ca(OH)2, KOHC. LiOH, CaCl2, HCl
D. Ca(OH)2, Ba(OH)2, HNO35. Mt oxit ca photpho c phn t khi bng 142. CTHH ca oxit l:
A. P2O3
B. PO2
C. P2O4
D. P2O56. Nung a mol KClO3 thu c V1 lit kh Oxi (ktc), nung a mol KMnO4 thu c V2 lit kh Oxi (ktc). T l V1/V2 l:
A. 1/2
B. 3/1
C. 1/1
D. 1/3
Cu 2: Cho cc cht sau: Cu2O, H2SO3, H3PO4, Al(OH)3, HCl, Fe2O3, Mg(HCO3)2, FeOH)2, CuSO4, Na3PO4, SO2. Hy hon thnh vo bng sau:OxitAxitBazMui
CTHHTn giCTHHTn giCTHHTn giCTHHTn gi
Cu 3: C 4 bnh ring bit ng cc cht kh sau: kh Oxi, kh Hiro, kh Nit, kh cacbonic. Nu phng php ho hc phn bit tng kh trn? Vit PTHH minh ho?
Cu 4:
Tnh khi lng CuSO4 c trong 250 gam dung dch bo ho CuSO4 100C? Bit tan ca CuSO4 100C l 75,4 gam.
Nu h nhit ca dung dch bo ho CuSO4 trn xung 20C th lng mui tch ra l bao nhiu gam? Bit tan ca CuSO4 20C l 20,7 gam.
kim tra HKII( 2)
Mn: Ho hc 8
Thi gian: 45 pht
Cu 1: (3) Chn cu tr li ng?
1. Cho 2 nguyn t A v B c ho tr khng i. Cng thc oxit ca A l A2O ; cng thc hp cht ca B vi Hiro l BH3. Cng thc ng ca hp cht to bi A v B l:
A. AB
B. A3B2
C. A3B
D. A2B32. Dy cc cht tan c trong nc l:
A. KOH, HNO3, CaCO3, AlCl3
B. NaOH, CuSO4, H2SO4, Mg(OH)2C. KCl, Mg(NO3)2, Ba(OH)2, MgSO4
D. FeCl3, H2SiO3, HCl, Na2CO33. Cc cht lm i mu qu tm l:
A. KOH, NaCl, CaCO3
C. MgO, Cu(OH)2, KOH
B. KOH, Ca(OH)2, HCl
D. KOH, Cu(OH)2, HCl
4. Dy cc CTHH biu din kim l:
A. LiOH, CaCl2, HCl
B. Ca(OH)2, Ba(OH)2, HNO3C. NaOH, KOH, Ba(OH)2
D. Fe(OH)2, Ca(OH)2, KOH
5. Mt oxit ca nit c phn t khi bng 108. CTHH ca oxit l:
A. N2O5
B. NO2
C. NO
D. N2O36. Nung a mol KClO3 thu c V1 lit kh Oxi (ktc), nung a mol KMnO4 thu c V2 lit kh Oxi (ktc). T l V1/V2 l:
A. 1/2
D. 1/3
C. 1/1
B. 3/1Cu 2: Cho cc cht sau: FeO, HNO2, K2O, Ca(OH)2, KH2PO4, Fe(NO3)3, Ca(HSO4)2, Fe(OH)3, H2SO4, SO3. Hy hon thnh vo bng sau:
OxitAxitBazMui
CTHHTn giCTHHTn giCTHHTn giCTHHTn gi
Cu 3:
C 4 l ring bit ng 4 dung dch trong sut, khng mu l : dung dch NaOH, dung dch NaCl, dung dch H2SO4 v nc ct. Hy nu phng php phn bit 4 dung dch trn?
Cu 4:
Tnh khi lng KNO3 c trong 650 gam dung dch bo ho KNO3 100C? Bit tan ca KNO3 100C l 246 gam.
Nu h nhit ca dung dch bo ho KNO3 trn xung 20C th lng mui tch ra l bao nhiu gam? Bit tan ca KNO3 20C l 31,6 gam.