Practice Sheets & enote-Chemical Reaction & Equations

Chemical reaction and equations worksheet-7

One Word questions:

1. A piece of wood is crafted into a shape which allows a batsman to apply force on the ball. What type of change occurs in wood?

2. An iron rod can be magnetized by passing an electric current through an insulated coil wound around. What type of change occurs in Iron rod?

3. When a person eats chocolate what type of change occurs?

4. What type of change is tarnishing of silver cutlery?

5. What type of change takes place on ignition of gasoline?

6. Mass of the individual substances that undergo the change, always, either increases or decreases. What type of change is it?

Chemical reaction and equations worksheet-8

One Word questions:

21. NH₄Cl is the formula of –

22. N₂ + 3H₂ → 2NH₃ What type of reaction is the given reaction?

23. PbCl₂ + H₂S → PbS + 2HCl What type of reaction is the  given reaction?

24. What is the name of HgS?

25. What is the name of Mg(NO₃)₂?

26. What is the name of K₂SO₄ ?

27. What is the name of reactant which is in solid state in the given reaction?

Chemical reaction and equations worksheet-9

True or False:

1. BaCl_2(aq) + Al₂(SO₄)_3(aq) → AlCl_3(aq) + BaSO₄↓ is a displacement reaction.

2. The formula of Calcium nitrate is- Ca(NO₃)₂.

3. The formula of Nickel sulphide is- NiS_2.

4. The formula of Aluminium chloride is AlCl₄.

5. Aluminium chloride reacts with magnesium forming magnesium chloride is a displacement reaction.

6. 2NH₃(g) + H₂SO₄(aq) → (NH₄)₂ SO₄(aq). Given reaction  a decomposition reaction

7. Reduction is addition of hydrogen.