M. RahmanC1 TOPIC 3

1) Describe the tests for Oxygen (2).

Ans:Relight a glowing splint

M. RahmanC1 TOPIC 3

2) Describe the tests for Hydrogen (2).

Ans:Squeaky pop with a lighted splint

M. RahmanC1 TOPIC 3

3) Describe the tests for chlorine (2).

Ans:A damp blue litmus paper turns white (temporarily turning red)

M. RahmanC1 TOPIC 3

4) Name three laboratory acids (3).

Ans:Hydrochloric acid (HCl)Sulphuric acid (H2SO4)Nitric Acid (HNO3)

M. RahmanC1 TOPIC 3

5) Name two products that a contain everyday acids (2).

Ans:Oranges (Citrus fruits)Vinegar.

M. RahmanC1 TOPIC 3

6) Name three laboratory alkali

Ans:Sodium Hydroxide (NaOH)Calcium Carbonate (CaCO3)Calcium Hydroxide (Ca(OH)2

Metal Oxides, hydroxides or carbonates

M. RahmanC1 TOPIC 3

7. Name a product containing house hold alkali.

Ans:Soap or Shampoo

M. RahmanC1 TOPIC 3

8. What is the process called when an acid reacts with alkali?

Ans:Neutralisation

M. RahmanC1 TOPIC 3

9. What is the product of the reaction of an acid and alkali.

Ans:Salt + water

M. RahmanC1 TOPIC 3

10) Complete the word equationAcid + Alkali ----____+____

Ans:

Acid + Alkali ----Salt + Water

M. RahmanC1 TOPIC 3

11) What are the pH of: a) Acid b) Alkalic) When a substance is neutral;

.

Ans:a) Below 7b) Above 7c) 7

M. RahmanC1 TOPIC 3

12) Name some uses of salts (2).

Ans:• Ammonium nitrate (salt)• Fire works (colouring agents-calcium chloride)

M. RahmanC1 TOPIC 3

Complete the equation;13) Metal oxide + Hydrochloric acid ----

Ans

Metal oxide + Hydrochloric acid ---- Metal Chloride + Water

M. RahmanC1 TOPIC 3

Complete the equation14) Metal oxide + Sulphuric acid ----

Ans:

Metal oxide + Sulphuric acid ---- Metal sulphate + Water

M. RahmanC1 TOPIC 3

Complete the equation15) Metal hydroxide + Hydrochloric acid ----

Ans:

Metal oxide + Hydrochloric acid ---- Metal Chloride + Water

M. RahmanC1 TOPIC 3

Complete the equation16) Metal hydroxide + Sulphuric acid ----

Ans:

Metal hydroxide + Sulphuric acid ---- Metal sulphate + Water

M. RahmanC1 TOPIC 3

Complete the equation17. Metal hydroxide + Nitric acid ----

Ans:

Metal hydroxide + Nitric acid ---- Metal nitrate + Water

M. RahmanC1 TOPIC 3

Complete the equation18. Metal carbonate + Hydrochloric acid ----

Ans:

Metal carbonate + Hydrochloric acid -- Metal chloride + water + carbon dioxide

M. RahmanC1 TOPIC 3

Complete the equation19. Metal carbonate + Nitric acid ----

Ans:

Metal carbonate + nitric acid -- Metal nitrate + water + carbon dioxide

M. RahmanC1 TOPIC 3

20) What would neutralise sulphuric acid and why? a) Sodium Oxide b) Sodium Chloride C) Sodium Sulphate

a) Sodium Oxide because this is the only one that is an alkali and the rest are salts. Acids react with alkali.

M. RahmanC1 TOPIC 3

21) Which acid will give you metal sulphate a) Hydrochloric acid b) Nitric acid c) Sulphuric acid

c) Sulphuric acid

M. RahmanC1 TOPIC 3

22) Which acid will give you metal Nitrate a) Hydrochloric acid b) Nitric acid C) Sulphuric acid

Ans:b) Nitric acid

M. RahmanC1 TOPIC 3

23) Which acid will give you carbon dioxide when reacted with an acid

a) Sodium hydroxide b) Sodium hydroxide C) Sodium carbonate

Ans:C) Sodium carbonate

M. RahmanC1 TOPIC 3

24) Name the acid found in our stomach

Ans:Hydrochloric acid (HCl)

M. RahmanC1 TOPIC 3

25) What is the job of the acid found in the stomach (2)

Ans:1) Help with digestion2) To kill bacteria

M. RahmanC1 TOPIC 3

26) How is indigestion caused?

Ans:Excess acid in the stomach.

M. RahmanC1 TOPIC 3

27) What do indigestion tablets contain?

Ans:Alkali/Base.

M. RahmanC1 TOPIC 3

28) How do indigestion tablets work? (2)

Ans:

• They contain alkali and• work by neutralising the excess acid in the

stomach..

M. RahmanC1 TOPIC 3

29) Why are power station chimneys lined with alkali? (4)

Ans• Sulphur dioxide released (1);• which is acidic (1);• reacts with alkali to neutralises it (1);• preventing it from going to the atmosphere (1)• reacting with water (1) • and forming acid rain (1)

M. RahmanC1 TOPIC 3

30) Describe how acid rain is formed.

Ans• Fossil burnt (1),• Release sulphur • Which reacts with oxygen to form sulphur dioxide

(1),• Reacts with rain water to produce acid rain (1)

M. RahmanC1 TOPIC 3

31) Describe how the effects of acid rain are reduced on farm land?• soil is acidic (1)• add alkali (1),• to neutralise the acid (1)

M. RahmanC1 TOPIC 3

32) Describe what electrolysis is.

Electrolysis is the breaking down of a compound using electricity to produce two other elements.

M. RahmanC1 TOPIC 3

33) The electricity required for electrolysis comes from….

Ans:Direct current (DC current)

M. RahmanC1 TOPIC 3

34) What is the liquid in electrolysis called that conducts the electricity?

AnsElectrolyte

M. RahmanC1 TOPIC 3

35) What is the role of the electrode?

AnsIt provides the electricity to the electrolyte

M. RahmanC1 TOPIC 3

36) In the electrolysis of hydrogen chloride, the products are…..

AnsHydrogen gas and Chlorine gas

M. RahmanC1 TOPIC 3

37) Name three uses of Chlorine (3).

Ans• Used to treat water supplies (kill bacteria)• Make bleach• Make polymers

M. RahmanC1 TOPIC 3

38) What does the electrolysis of water give? (2)

Ans:a) Hydrogen gasb) Oxygen gas

M. RahmanC1 TOPIC 3

39) What type of rock are;a) Chalkb) marble

Ans1) Sedimentary2) Metamorphic

M. RahmanC1 TOPIC 3

40) Write a balanced equation for what happens when limewater reacts with carbon dioxide.(3)

AnsCa(OH)2 + CO2 ---- CaCO3 + H2O

M. RahmanC1 TOPIC 3

41) When calcium carbonate is heated, a reaction takes place. Explain how you would show a reaction has taken place (3).

Ans• Carbon dioxide is produced when heated• bubble through lime water• Lime water goes milky

M. RahmanC1 TOPIC 3

42) Describe what you would observe when water is added, one drop at a time, to cold calcium oxide

Ans• fizzing / hissing (1)• steam (1)• swells (1)• solid crumbles (to a powder) (1)• becomes hot (1)

M. RahmanC1 TOPIC 3

43) Some indigestion tablets contain magnesium carbonate.Write the word equation for the reaction of magnesium carbonate with hydrochloric acid.Ans

Magnesium carbonate + Hydrochloric acid -- Magnesium Chloride + Hydrogen+ water

M. RahmanC1 TOPIC 3

44) What do each of these hazard symbols means?

a) Highly flammableb) Toxicc) Harmful (irritant)d) Corrosive