# 2006 June questions – Practical work Test

1. The diagram below is an illustration of the longitudinal section of a fruit.

Study the diagram carefully and answer the questions that follow.

1 (a)

Name one fruit which has its parts similar to the one illustrated.

1 (b)
Name the parts labelled I, II, III and IV.

1 (c)

(i) State the type of fruit illustrated

1 (d)
Describe each of the parts labelled III and IV when the fruit ripens.

1 (e)

(i) Explain how the fruit is dispersed

1 (f)
Name two plants whose fruits are dispersed by the wind.

2.

Figure 2 below illustrates four steps taken to perform a simple experiment to determine the density of an irregular solid, A.

Study the figure carefully and answer the questions that follow

##### Figure 2 (Steps I, II, III and IV)

2 (a)
Name the pieces of apparatus used in each of steps I, II and IV.

2 (b)
Describe briefly each of the four steps.

2 (c)

(i) Record the readings in step I and step IV.

(ii) Hence determine the density of the solid A.

2 (d)
State two precautions to be taken when carrying out the experiment.

3. Study carefully the crops illustrated in Figure 3 below and use them to answer the questions that follow.

Figure 3 (A, B, C, D, E and F)

3 (a)
Identify each of the crops A, B, C, D, E and F without reasons.

3 (b)

(i) Assign each crop to its class according to its economic use

(ii) State one feature which is special to the classes to which each of the crops C and E belong.

3 (c)

(i) What planting materials are used to propagate each of crops A and F?

(ii) Describe briefly how crop A is propagated using the planting material you have given in (I).

4.

Figure 4 is an illustration of a set of glassware used in the preparation of exactly 100cm3 of 1.0 molar solution of sodium chloride in the laboratory.

Study the figure and the information below carefully and answer the questions that follow.

Figure 4 (A, B, C and D)

The capacity of A is 100 cm3.
B contains distilled water.
C contains weighed amount of sodium chloride (NaCl)
The molar mass of NaCl is 58.5

4 (a)
Identify each of the glassware A, B, C and D.

4 (b)
Read and record the volume of distilled water in B.

4 (c)
Determine the mass of sodium chloride in C for the preparation of the 1.0 M NaCl solution.