1. - ,
1) | H2S + 2KOH = K2S + 2H2O |
2) | Fe+ 2HCl = FeCl2 + H2O |
3) | SO3 + aO = CaSO4 |
4) | Fe + CO = Fe + CO2 |
2.
1) | SO3 → SO | 3) | S → SO2 |
2) | SO → SO2 | 4) | SO → S |
3.
1) | NO2 → NO | 3) | NO2 → NO |
2) | NO → N2 | 4) | N2O5 → NO |
4.
1) | NO → NO | 3) | NO2 → NO |
2) | NO → N2 | 4) | N2O3 → NO |
5.
1) | O2 → O | 3) | O2 → |
2) | → O2 | 4) | → 2 |
6. P,
SO2 + Cl2 +2H2O = H2SO4 + 2HCl,
1) | S+2 → S+4 | 2) | S+4 → S+6 | 3) | S+4 → S+2 | 4) | S-2 → S+4 |
7.
1) | r2O3 → rO | 3) | r2O → rO |
2) | rO → r2O | 4) | r2O → r3+ |
8.
NO → NO2 → NO → N2O
1) | N+3 → N+2 → N+3 → N+1 | 3) | N+5 → N+3 → N+4 → N+2 |
2) | N+5 → N+4 → N+3 → N+1 | 4) | N+5 → N+3 → N+4 → N+1 |
9.
SO → SO2 → SO → H2S
1) | S+4 → S+4 → S+6 → S+2 | 3) | S+4 → S+4 → S+6 → S-2 |
2) | S+6 → S+4 → S+6 → S-2 | 4) | S+6 → S+4 → S+4 → S+2 |
10.
SO3 → SO → SO → H2S
1) | S+4 → S+4 → S+6 → S+2 | 3) | S+6 → S+4 → S+4 → S+2 |
2) | S+6 → S+4 → S+6 → S-2 | 4) | S+4 → S+4 → S+6 → S-2 |
11.
N+4 → N+5 → N0 →N-3
1) | NO2 → NO → N2 → NH3 |
2) | NO2 → NO → N2 → N23 |
3) | NO → NO → N2 → NH3 |
4) | NO → NO → N2 → N23 |
12.
S+4 → S+4 → S-2 → S+6
1) | SO → SO3 → SO2 → SO |
2) | SO2 → SO → H2S → SO3 |
3) | SO → SO → H2S → SO3 |
4) | SO2 → SO → H2S → SO |
13.
SO2 SO S SO H2S
|
|
1) | 1 2 | 2) | 1 3 | 3) | 3 4 | 4) | 2 4 |
14.
NO2 NO N2 NH3 NO
1) | 1 2 | 2) | 1 3 | 3) | 2 3 | 4) | 3 4 |
15.
MnO2 Mn2+ MnO2 MnO MnO
1) | 1 4 | 2) | 2 3 | 3) | 2 4 | 4) | 3 4 |
16.
Cr(OH)3 CrO Cr2O Cr3+ Cr
1) | 1 3 | 2) | 2 3 | 3) | 2 4 | 4) | 3 4 |
17.
1) | HNO3 | 2) | O2 | 3) | Fe | 4) | Cl2 |
18.
1) | 2) | H2 | 3) | Al | 4) | FeO |
19.
1) | O2 | 2) | HNO3 | 3) | Mg | 4) | Cl2 |
20. ,
1) | MnO2 | 2) | K2MnO4 | 3) | KMnO4 | 4) | Mn2O3 |
21. ,
1) | Ca3N2 | 2) | KNO2 | 3) | KNO3 | 4) | N2O3 |
22.
1) | C | 2) | N2 | 3) | Al | 4) | Si |
23.
1) | 3) | ||
2) | 4) |
24.
1) | 3) | ||
2) | 4) |
25. -
1) | NH4Cl | 2) | KNO3 | 3) | N2O5 | 4) | NO2 |
26. -
1) | SO3 | 2) | H2SO3 | 3) | K2S | 4) | K2SO4 |
27. -
1) | MnO4 | 2) | Mn2O7 | 3) | MnO2 | 4) | Mn |
28. -
1) | K2CrO4 | 2) | K2Cr2O7 | 3) | Cr(OH)3 | 4) | CrO3 |
29. (III) c (II)
1) | Fe+3 | 2) | C+2 | 3) | O-2 | 4) | Fe |
30. ,
1) | Ca + 2C = CaC2 | 3) | + 22 = 4 |
2) | 2 + SiO2 = Si + 2CO | 4) | 3 + 4Al = Al4C3 |
31. - ,
1) | S + 6HNO3 = H2SO4 + 6NO2 + 2H2O |
2) | 3S + 6NaOH = 2Na2S + Na2SO3 + 3H2O |
3) | 2S + C = CS2 |
4) | S + 3F2 = SF6 |
32. - ,
1) | Cl2 + 2KBr = 2KCl + Br2 |
2) | Cl2 + CH4 = CH3Cl + HCl |
3) | Cl2 + H2O = HCl + HClO |
4) | 3Cl2 + 2Fe = 2FeCl3 |
33. 2 ,
1) | O2 + 2NaOH = Na2CO3 + H2O |
2) | O2 + 2Mg = C + 2MgO |
3) | O2 + MgO = MgCO3 |
4) | O2 + H2O + CaCO3 = Ca(HCO3)2 |
34. S2 ,
|
|
1) | SO2 + 2KOH = K2SO3 + H2O |
2) | SO2 + NO2 = SO3 + NO |
3) | SO2 + C = S + CO2 |
4) | SO2 + CaO = CaSO3 |
35. S2 ,
1) | SO2 + CaO = CaSO3 |
2) | SO2 + NO2 = SO3 + NO |
3) | SO2 + 2H2S = 3S + 2H2O |
4) | SO2 + 2NaOH = Na2SO3 + H2O |
36.
1) | H+ Zn0 | 2) | SO Zn0 | 3) | Zn0 SO | 4) | Zn0 H+ |
37.
1) | + Zn0 | 2) | Zn0 NO | 3) | NO Zn0 | 4) | Zn0 H+ |
38.
1) | Zn0 SO | 2) | H+ Zn0 | 3) | SO Zn0 | 4) | Zn0 + |
39. (II)
1) | |
2) | |
3) | |
4) | (II) |
40. (IV)
1) | |
2) | |
3) | |
4) |
41. Cr+2 → Cr+3 ,
1) | CrCl2 + 2NaOH = Cr(OH)2 + 2 NaOH |
2) | 4CrCl2 + 4HCl + O2 = 4CrCl3 + 2H2O |
3) | CrO + H2SO4 = CrSO4 + H2O |
4) | Cr + 2HCl = CrCl2 + H2O |
42. S+6 → S+4 ,
1) | H2SO4 + 2NaOH = Na2SO4 + 2 H2O |
2) | 5H2SO4() + 4Zn = 4ZnSO4 + H2S + 4H2O |
3) | 2H2SO4() + Cu = CuSO4 + SO2 + 2H2O |
4) | Na2SO3 + 2HCl = 2NaCl + SO2 + H2O |
43. N+5 → N+4 ,
1) | HNO3 + NaOH = NaNO3 + H2O |
2) | 8HNO3() + 3Cu = 3Cu(NO3)2 + 2NO + 4H2O |
3) | 2KNO3 = 2KNO2 + O2 |
4) | 2HNO3() + Ag = AgNO3 + NO2 + H2O |
44. Fe+3 → Fe+2 ,
1) | FeCl3 + 3NaOH = Fe(OH)3 + 3NaCl |
2) | 2FeCl3 + H2S = 2FeCl2 + S + 2HCl |
3) | 2Fe(OH)3 = Fe2O3 + 3H2O |
4) | Fe3O4 + 4H2 = 3Fe + 4H2O |
45. - ,
1) | SO2 + H2S → S + H2O |
2) | S + H2SO4 → SO2 + H2O |
3) | S + H2SO4 → H2S + H2O |
4) | H2SO4 + H2S → S + H2O |
46. - ,
1) | HNO2 + KMnO4 + H2SO4 → HNO3 + MnSO4 + K2SO4 + H2O |
2) | KMnO4 + NaNO3 + H2SO4 → MnSO4 + NaNO2 + K2SO4 + H2O |
3) | KMnO4 + SO2 + H2O → MnSO4 + H2SO4 + K2SO4 |
4) | KMnO4 + HBr → Br2 + MnBr2 + KBr + H2O |
47. - ,
1) | SO2 + K2Cr2O7 + H2SO4 → Cr2(SO4)3 + K2SO4 + H2O |
2) | NaI + K2Cr2O7 + H2SO4 → I2 + Cr2(SO4)3 + K2SO4 + Na2SO4 + H2O |
3) | K2Cr2O7 + Fe + H2SO4 → Cr2(SO4)3 + Fe2(SO4)3 + K2SO4 + H2O |
4) | KI + K2Cr2O7 + H2SO4 → I2 + 2CrO4 + K2SO4 + H2O |