CSEC Integrated Science Paper 3 May/June 2006 - Free CXC Past Paper with Answers

Candidates are required to answer ALL questions.

FIVE solutions, A, B, C, D and E, are provided.

Use Universal Indicator and the colour chart to investigate the pH of EACH of the five solutions. Record your observations in Table 1 below.

TABLE 1: pH VALUES OF SOLUTIONS

In Table 2, classify Solutions A, B, C, D and E as acidic, basic or neutral by writing the solution in the appropriate column.

TABLE 2: CLASSIFICATION OF SOLUTIONS A – E

Describe how you would investigate the reactivity of metals using a dilute acid.

You are provided with four metals, W, X, Y and Z.

Using the method you described in Question 2 (a) above, compare the reactivity of these four metals.

Record your observations in Table 3.

TABLE 3: REACTIVITY OF METALS

Using your results in (b) above, write the metals in increasing order of reactivity from the least to the most reactive.

You are provided with the following materials / substances:

Benedict's solution
Filter paper
6 test tubes
Biuret reagent
Half of an English apple
10 cm of cream of wheat
A piece of egg white

In the space provided below, make an accurate drawing of the cut half of the English apple provided. Neatly label your drawing and state its title and magnification.

Perform food tests on the apple, cream of wheat and egg white provided. Record your observations in Table 4.

TABLE 4: FOOD TESTS ON ENGLISH APPLE, CREAM OF WHEAT AND EGG WHITE

Based on your results in (b) above, state the nutrients that are contained in EACH of the three foods.

Apple: Cream of wheat: Egg white:

CSEC Integrated Science Paper 3 May/June 2006 Questions

Question 1 (17 marks)

Question 2 (14 marks)

Question 3 (23 marks)