NTSE MCQs 1 on "Chemical Reactions and Equations"

These are NTSE MCQs 1 of "Chemical Reactions and Equations" . Practice MCQs to check your knowledge for Entrance examination like NTSE etc.

1. CuSO₄ + Zn ==> Cu + ZnSO₄ This reaction is an example of a:

• Combination reaction
• Double displacement reaction
• Decomposition reaction
• Displacement reaction

2. What happens when dilute Sulphuric acid is added to Zn granules? Tick the correct answer.

• Hydrogen gas and Zinc chloride are produced
• Chlorine gas and Zinc hydroxide are produced
• No reaction takes place
• 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.

• BaCl₂ + Al₂(SO₄)₃ ==> AlCl₃ + BaSO₄
• 3BaCl₂ + Al₂(SO₄)₃ ==> 2 AlCl₃ + 3BaSO₄
• BaCl₂ + AlSO₄ ==> AlCl₂ + BaSO₄
• 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)

• Combination, Decomposition
• Double displacement, Combination
• Decomposition, Combination
• Displacement, Decomposition

5. The balancing of chemical equations is in accordance with:

• Law of combining volumes
• Law of constant proportions
• Law of conservation of mass
• 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.

• a&b
• a & c
• c & d
• all

7. What type of reaction is respiration

• Exothermic
• Endothermic
• Reduction reaction
• 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)

• Cu is oxidised, H₂O is reduced
• CuO is oxidised, H₂O is reduced
• H₂ is oxidised, CuO is reduced
• 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.

• Lime stone, CaCO₃
• Lime , CaCO₃
• Calcium oxide , CaO
• Calcium carbonate , CaCO₃

10. Write the balanced reaction of Calcium oxide with water and state what type of reaction is this

• CaO + H₂O ==> CaOH + H₂, displacement
• CaO + H₂O ==> Ca(OH)₂, combination
• CaO + H₂O ==> Ca(OH)₂, decomposition
• CaO + H₂O ==> CaOH, combination