Chapter 10: Types of Chemical Reactions — Online MCQ Test
SCIENCE · CLASS 10th · Tamil Nadu State Board
Practice Chapter 10: Types of Chemical Reactions with a free chapter-wise online MCQ test.
This chapter covers: Focusing on chemical transformations this chapter details combination decomposition displacement double displacement and neutralization reactions. Students examine reaction rate fa....
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Chapter 10: Types of Chemical Reactions — Important Questions & Answers
The chemical reaction in which two or more reactants combine to form a single product is known as:
- A. Combination reaction
- B. Decomposition reaction
- C. Displacement reaction
- D. Double displacement reaction
Answer: A. Combination reaction
A combination reaction occurs when two or more substances unite to form a single new substance.
A combination reaction occurs when two or more substances unite to form a single new substance.
Which of the following is an example of a thermal decomposition reaction?
- A. Burning of magnesium ribbon
- B. Heating of calcium carbonate
- C. Reaction of zinc with hydrochloric acid
- D. Reaction between silver nitrate and sodium chloride
Answer: B. Heating of calcium carbonate
Thermal decomposition involves the breakdown of a compound into simpler substances using heat, as seen when calcium carbonate is heated into calcium oxide and carbon dioxide.
Thermal decomposition involves the breakdown of a compound into simpler substances using heat, as seen when calcium carbonate is heated into calcium oxide and carbon dioxide.
In the displacement reaction: Fe + CuSO4 -> FeSO4 + Cu, which element is being displaced?
- A. Iron (Fe)
- B. Copper (Cu)
- C. Sulfur (S)
- D. Oxygen (O)
Answer: B. Copper (Cu)
Iron is more reactive than copper, so it displaces copper from the copper sulfate solution.
Iron is more reactive than copper, so it displaces copper from the copper sulfate solution.
Consider the reaction: N2(g) + 3H2(g) <=> 2NH3(g). Which action would shift the equilibrium to the right?
- A. Increasing the volume of the container
- B. Removing ammonia as it is formed
- C. Adding more ammonia
- D. Decreasing the pressure
Answer: B. Removing ammonia as it is formed
According to Le Chatelier's principle, removing a product shifts the equilibrium towards the forward direction to compensate for the loss.
According to Le Chatelier's principle, removing a product shifts the equilibrium towards the forward direction to compensate for the loss.
A substance 'X' has a pH of 3. If it is diluted with water, what happens to its pH value?
- A. It remains the same
- B. It decreases
- C. It increases towards 7
- D. It drops to 0
Answer: C. It increases towards 7
Diluting an acid reduces the concentration of H+ ions, which causes the pH to rise and move closer to the neutral value of 7.
Diluting an acid reduces the concentration of H+ ions, which causes the pH to rise and move closer to the neutral value of 7.