Question

1. CuSO4 + Zn → Cu + ZnSO4 This reaction is an example of a: 
a. Combination reaction. 
b. Double displacement reaction. 
c. Decomposition reaction. 
d. Displacement reaction.
 
2. What happens when dilute Sulphuric acid is added to Zn granules? Tick the correct answer. 
a. Hydrogen gas and Zinc chloride are produced. 
b. Chlorine gas and Zinc hydroxide are produced. 
c. No reaction takes place. 
d. Zinc salt and water are produced.
 
3. Translate the following statements into chemical equations and then balance it. 
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. 
a. BaCl2 + Al2(SO4)3 → AlCl3 + BaSO4 
b. 3BaCl2 + Al2(SO4)3 →2 AlCl3 +3BaSO4 
c. BaCl2 + AlSO4 → AlCl2 + BaSO4 
d. BaCl3 + Al(SO4)3 → AlCl3 + Ba(SO4)3
 
4. Identify the type of reaction in each case. 
Zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)
Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g) 
a. Combination, Decomposition 
b. Double displacement, Combination 
c. Decomposition, Combination 
d. Displacement, Decomposition
 
5. The balancing of chemical equations
is in accordance with:
a. Law of combining volumes
b. Law of constant proportions
c. Law of conservation of mass
d. Both b and c
 
6. Which of the statements about the reaction below are incorrect? Fe2O3(s) + 3CO(g) →2Fe(s) +3CO2(g)
a. Iron is getting reduced.
b. Carbon dioxide is getting oxidised.
c. Carbon monoxide is getting oxidised.
d. Iron oxide is getting reduced.
i. a & b
ii. a & c
iii. c & d
iv. all
 
7. What type of reaction is respiration
a. Exothermic
b. Endothermic
c. Reduction reaction
d. Combination reaction
 
8. Identify the substances that are oxidised and the substances that are reduced in the following reactions. CuO(s) + H2(g)→ Cu(s) + H2O(l)
a. Cu is oxidised, H2O is reduced
b. CuO is oxidised, H2O is reduced
c. H2 is oxidised, CuO is reduced
d. H2 is oxidised, H2O is reduced
 
9. A solution of a substance ‘X’ is used for white washing. Name the substance ‘X’ and write its formula.
a. Lime stone, CaCO3
b. Lime , CaCO3
c. Calcium oxide , CaO
d. Calcium carbonate , CaCO3
 
10. Write the balanced reaction of Calcium oxide with water and state what type of reaction is this
a. CaO + H2O→ CaOH + H2, displacement
b. CaO + H2O → Ca(OH)2, combination
c. CaO + H2O→ Ca(OH)2, decomposition
d. CaO + H2O→ CaOH, combination1. CuSO4 + Zn → Cu + ZnSO4 This reaction is an example of a: 
a. Combination reaction. 
b. Double displacement reaction. 
c. Decomposition reaction. 
d. Displacement reaction.
 
2. What happens when dilute Sulphuric acid is added to Zn granules? Tick the correct answer. 
a. Hydrogen gas and Zinc chloride are produced. 
b. Chlorine gas and Zinc hydroxide are produced. 
c. No reaction takes place. 
d. Zinc salt and water are produced.
 
3. Translate the following statements into chemical equations and then balance it. 
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. 
a. BaCl2 + Al2(SO4)3 → AlCl3 + BaSO4 
b. 3BaCl2 + Al2(SO4)3 →2 AlCl3 +3BaSO4 
c. BaCl2 + AlSO4 → AlCl2 + BaSO4 
d. BaCl3 + Al(SO4)3 → AlCl3 + Ba(SO4)3
 
4. Identify the type of reaction in each case. 
Zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)
Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g) 
a. Combination, Decomposition 
b. Double displacement, Combination 
c. Decomposition, Combination 
d. Displacement, Decomposition
 
5. The balancing of chemical equations
is in accordance with:
a. Law of combining volumes
b. Law of constant proportions
c. Law of conservation of mass
d. Both b and c
 
6. Which of the statements about the reaction below are incorrect? Fe2O3(s) + 3CO(g) →2Fe(s) +3CO2(g)
a. Iron is getting reduced.
b. Carbon dioxide is getting oxidised.
c. Carbon monoxide is getting oxidised.
d. Iron oxide is getting reduced.
i. a & b
ii. a & c
iii. c & d
iv. all
 
7. What type of reaction is respiration
a. Exothermic
b. Endothermic
c. Reduction reaction
d. Combination reaction
 
8. Identify the substances that are oxidised and the substances that are reduced in the following reactions. CuO(s) + H2(g)→ Cu(s) + H2O(l)
a. Cu is oxidised, H2O is reduced
b. CuO is oxidised, H2O is reduced
c. H2 is oxidised, CuO is reduced
d. H2 is oxidised, H2O is reduced
 
9. A solution of a substance ‘X’ is used for white washing. Name the substance ‘X’ and write its formula.
a. Lime stone, CaCO3
b. Lime , CaCO3
c. Calcium oxide , CaO
d. Calcium carbonate , CaCO3
 
10. Write the balanced reaction of Calcium oxide with water and state what type of reaction is this
a. CaO + H2O→ CaOH + H2, displacement
b. CaO + H2O → Ca(OH)2, combination
c. CaO + H2O→ Ca(OH)2, decomposition
d. CaO + H2O→ CaOH, combinations​

Answer 1

Answer:

1. CuSO4 + Zn ➡️ Cu + ZnSO4 is an example of metal displacement reaction .