1. a) what happens when:
(i) Dilute sulphuric acid is poured on a copper plate?
(ii) Iron nails are placed in a copper (II) sulphate solution?
b) Write word equations of the reactions involved, if any.
2. Normally, copper is used to make hot water tanks and not steel (an alloy of iron). Explain why.
3. Discuss with your parents / neighbours / goldsmiths why gold is preferred for making jewellery.
4. Can you store lemon slices in an aluminium foil? Explain.
5. The following five metals were made to react with water as shown in Table 5.3. Study the table and answer the questions that follow:
Table 5.3:
| Metal | Observations |
| A | No reaction with water or steam |
| B | Reacts vigorously with cold water |
| C | Very slow reaction with water but fast when heated in steam |
| D | Fairly vigorous in cold water |
| E | No reaction in water but fairly vigorous when heated in steam |
a) Identify the metal which is:
(I) the most reactive.
(ii) the least reactive.
b) Put the five metals, A – E, in order of their increasing reactivity using the above data.
6. Would a ring made of gold react if you put it into a beaker of dilute acid?
Explain your answer.
4(a) what are your roles as citizen of Uganda? (b) Each and every individual in…
3(a) why do we political Eduction in the New Uganda curriculum? (b) Explain the roles…
2(a) Describe the creation story in relation to the origin of man. (b) Explain why…
Leave a Comment