1. KMnO4 +HCl →KCl + MnCl2+ H2O+ Cl2
Ans- 2KMnO4 +16HCl →2KCl + 2MnCl2+ 8H2O+ 5Cl2
2. KOH+ H2SO4 →K2SO4 + H2O
Ans- 2KOH+ H2SO4 →K2SO4 + 2H2O
3. Al(OH)3+ H2SO4 →Al2(SO4)3+
H2O
Ans- 2Al(OH)3+ 3H2SO4 →Al2(SO4)3+ 6H2O
4. KNO3 →KNO2 + O2
Ans- 2KNO3 →2KNO2 + O2
5. Al + O2→ Al2O3
Ans- 4Al + 3O2→ 2Al2O3
6. HNO3+Ca(OH)2 →Ca(NO3)2+ H2O
Ans- 2HNO3+Ca(OH)2 →Ca(NO3)2+ 2H2O
7. NaOH+ H2SO4 →Na2SO4+ H2O
Ans- 2NaOH+ H2SO4 →Na2SO4+ 2H2O
8. CH4 +O2 → CO2 +
H2O
Ans- CH4 +O2 → CO2 + 2H2O
9. Na+ H2O → NaOH + H2
Ans- 2Na+ 2H2O → 2NaOH + H2
10. Fe2O3 + HCl → FeCl2 +
H2O
Ans- Fe2O3 + 6HCl → 2FeCl2 + 3H2O
11. C2H6 +
O2 → CO2 + H2O
Ans- 2C2H6 + 7O2 → 4CO2 + 6H2O
12. Fe+ O2 →Fe2O3
Ans- 4Fe+ 3O2 →2Fe2O3
13. KClO3 →KCl + O2
Ans- 2KClO3 →2KCl + 3O2
14. Fe + H2O →Fe3O4 +
H2
Ans- 3Fe + 4H2O →Fe3O4 + 4H2
15.NaCl+ AgNO3→AgCl + NaNO3
Ans- NaCl+
AgNO3→AgCl + NaNO3
16.BaCl2+ H2SO4 →BaSO4 +
HCl
Ans- BaCl2+
H2SO4 →BaSO4 + 2HCl
17. Ca(OH)2 +CO2 →CaCO3 +
H2O
Ans- Ca(OH)2 +CO2 →CaCO3 +
H2O
18. Zn+ AgNO3 →Zn(NO3)2 + Ag
Ans-
Zn+ 2AgNO3 →Zn(NO3)2 + 2Ag
19. Al+CuCl2 →AlCl3 + Cu
Ans- 2Al+3CuCl2 →2AlCl3 + 3Cu
20.BaSO4 +K2SO4→BaSO4+KCl
Ans- BaSO4 +K2SO4→BaSO4+2KCl
21.KBr+ BaI2 →KI
+BaBr2
Ans- 2KBr+ BaI2 →2KI +BaBr2
22. ZnCO3 →ZnO +CO2
Ans- ZnCO3 →ZnO
+CO2
23. H2+ Cl2 →HCl
Ans- H2+
Cl2 →2HCl
24.Mg +HCl →MgCl2+ H2
Ans- Mg +2HCl →MgCl2+ H2
25.AgBr →Ag+ Br2
Ans- 2AgBr →2Ag+ Br2
26. AgCl →Ag + Cl2
Ans- 2AgCl →2Ag + Cl2
27. Pb(NO3)2→PbO +NO2+O2
Ans- 2Pb(NO3)2→2PbO +4NO2+O2
28. FeSO4 → Fe2O3 +SO2 +
SO3
Ans- 2FeSO4 → Fe2O3 +SO2 +
SO3
29. H2S + Cl2→S + HCl
Ans- H2S
+ Cl2→S + 2HCl
30. Ba(OH)2 + HBr
→BaBr2 + H2O
Ans- Ba(OH)2 + 2HBr →BaBr2 + 2H2O
31. KCN+ H2SO4 →K2SO4 +
HCN
Ans- KCN+ H2SO4 →K2SO4 +
HCN
32. Al + HCl →AlCl3 +
H2
Ans- 2Al + 6HCl →2AlCl3 + 3H2
33.HgCl2 + SnCl2 →
Hg2Cl2 + SnCl4
Ans- HgCl2 +
SnCl2 → Hg2Cl2 + SnCl4
34.PbO2 + H2SO4 →PbSO4+
H2O+O2
Ans- 2PbO2 + 2H2SO4 →2PbSO4+ 2H2O+O2
35. C+ O2 →CO2
Ans - C+ O2 →CO2
36. Al + Fe2O3 →Al2O3 +
Fe
Ans- 2Al + Fe2O3 →Al2O3 + 2Fe
37. N2 + H2 →NH3
Ans- N2 + 3H2 →2NH3
38. NH3 + HCl →NH4Cl
Ans- NH3 +
HCl →NH4Cl
39. H2O →H2 +
O2
Ans- 2H2O →2H2 + O2
40. NH4Cl →NH3 + HCl
Ans- NH4Cl
→NH3 + HCl
41. NH3+ H2O →NH4OH
Ans- NH3+
H2O →NH4OH
42. Zn +H2SO4 →ZnSO4 +H2
Ans- Zn +H2SO4 →ZnSO4 +H2
43. BaCl2 + ZnSO4 →ZnCl2 +
BaSO4
Ans- BaCl2 +
ZnSO4 →ZnCl2 + BaSO4
44. NH3 + H2SO4 →(NH3)2SO4
Ans- 2NH3 + H2SO4 →(NH3)2SO4
45. CuO + H2 →Cu + H2O
Ans- CuO +
H2 →Cu + H2O
46. NH4NO2 →H2O
+ N2
Ans- NH4NO2 →2H2O + N2
47. NaBr + Cl2 →NaCl + Br2
Ans- 2NaBr + Cl2 →2NaCl + Br2
48. MgO + C →CO2 + Mg
Ans- 2MgO + C →CO2 + 2Mg
49. CaCO3 + HCl →CaCl2 + H2O
+CO2
Ans- CaCO3 + 2HCl →CaCl2 + H2O +CO2
50. Al2O3 + H2SO4 →Al2(SO4)3 +
H2O
Ans- Al2O3 + 3H2SO4 →Al2(SO4)3 + 3H2O
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Multiple Choice Questions
1. What is the chemical formula of aluminium sulphate?
a. Al3SO4
b. Al(SO4)3
c. Al2(SO4)3
d. AlSO4
Correct answer-(c)
2. What is the chemical name of (NH3)SO4?
a. Ammonia sulphate
b. Ammonium sulphite
c. Ammonium sulphide
d. Ammonium sulphate
Correct answer-(d)
3. What is the type of following chemical reaction- BaCl2 + ZnSO4 →ZnCl2 + BaSO4
a. Displacement reaction
b. Double displacement reaction
c. Combination reaction
d. Decomposition reaction
Correct answer –(b)
4. Which chemical equation is decomposition reaction?
a. Zn+ 2AgNO3 →Zn(NO3)2 + 2Ag
b. 2KClO3 →2KCl + 3O2
c. N2 + 3H2 →2NH3
d. BaCl2 + ZnSO4 →ZnCl2 + BaSO4
Correct answer –(b)
5. Which is the correct statement for a combination reaction?
a. A complex substance breaks down into two or more simple substances
b. Two or more substances combine to form a new substance
c. More reactive substance removes less reactive substance from the compound
d. None of the above
Correct answer –(b)
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