Chemical Reaction And Equations Worksheet Class X

Chemical Reaction And Equations

PRACTICE QUESTIONS

1. Fe + CuSO4 ->FeSO4 + Cu

Identify the type of reaction.

2. What does the symbol (g) used with water indicate?

3. How can we prevent fried food from turning ‘Rancid’?

4. Why does lime water turn milky when CO₂ is passed into it?

5. Which gas is evolved when lead nitrate is heated?

6. During electrolysis of water, how can we identify the gas present in each test tube?

7. Give an example of a photolytic reaction which is not a decomposition

reaction?

8. Fe + CuSO4àFeSO4 + Cu

In above reaction iron nail becomes brownish in colour and the blue colour of

copper sulphate solution fades. Why?

9. Identify the element which is most reactive and the element which is least

reactive?

A₂O₃ + 2B -> B₂O₃ + 2A

3CSO₄ + 2B -> B₂(SO₄)₃ + 3C

3CO + 2A -> A₂O + 3C

10. Write a chemical equation of a reaction in which a precipitate is formed.

11. Write your observation when Magnesium ribbon is burned in air? Name the

powder formed.

12. Which characteristics of a chemical change do you observe when dilute

sulphuric acid is added to zinc granules in a conical flask ?

13. Write word equation for the following chemical equation :

a. Mg + 2HCl ->MgCl₂ + H₂

b. 2KNO₃ heat   -> 2KNO₂(s) + O₂ (g)

14. What happens when CO2 (g) is bubbled through lime water. Write the

chemical equation.

15. What happens when a silver spoon is kept immersed in aqueous copper

sulphate solution?

16. Why does copper not liberate hydrogen on reacting with dilute sulphuric acid?

17. Write a chemical equation to show the process of respiration. Mention the type

of reaction.

18. Which of the following reactions show evolution of gas.

a. 2AgCl -> 2Ag + Cl₂

b. Pb + CuCl₂ -> PbCl₂ + Cu

c. CuO + H2 ->  Cu + H₂O

d. ZnO + C ->Zn + CO

19. Name 2 metals which get tarnished. Why does this happen ?.

20. Why is corrosion harmful?

21. Mention three situations in daily life where a chemical change occurs.

22. Balance the following chemical equations.

a. H₂SO₄ + NaOH ->Na₂SO₄ + H₂O

b. NaCl + AgNO₃ ->  AgCl + NaNO₃

c. CH₄ + O₂ -> CO₂ + H₂O

23. Write chemical equations for the following word equations :

a. Hydrogen + Chlorine ->Hydrogen Chloride

b. Sodium + Water -> Sodium Hydroxide + Hydrogen

c. Zinc Oxide + Carbon -> Zinc + Carbon Monoxide

24. What do you mean by endothermic and exothermic reactions? Give examples.

25. What happens when potassium iodide solution is added to lead nitrate

solution? Give equation of reaction and mention the type of reaction involved?

26. How can we make a chemical equation more informative?

27. Write one chemical equation to show:

a. Combination reaction

b. Decomposition reaction

c. Double Displacement Reaction

28. Write short notes on:

a. Corrosion

b. Rancidity

29. A substance X when mixed with water is used for white washing. The

substance X is also formed when a substance Y decomposes.

a. Identify X and Y and write their formula.

30. Define oxidation and reduction. Give an example of a Redox reaction.

Er.shyam pachori

Science Classes At C.L 81 D.D Nagar 9039803981