SPM Science 2017, Paper 2 (Question 5 & 6)


Question 5:
Diagram 5.1 shows an experiment to study a fermentation process.

Diagram 5.1



The word equation below represents the chemical reaction in Diagram 5.1.


(a) Based on the experiment,
(i) What is X?
(ii) State one characteristic of X. [2 marks]

(b) Mark (\/) on the element that can be found in X. [1 mark]




(c) Name one substance which can be used to replace glucose solution in Diagram 5.1. [1 mark]

(d) What is the effect of excessive consumption of alcohol to organ S and T shown in Diagram 5.2? [2 marks]

Diagram 5.2


Answer:
(a)(i)
Alcohol (Methanol/ Ethanol/ Butanol/ Pentanol/ Propanol)

(a)(ii)
Colourless/ Dissolves in water/ Flammable
(Choose one)

(b)
Carbon

(c)
Any fruit juice.

(d)(i)
Effect of excessive consumption of alcohol to organ S: Brain damage/ Imbalanced/ Blurred vision (Choose one)

(d)(ii)
Effect of excessive consumption of alcohol to organ T: Liver inflammation/ Scarring of liver/ Cirrhosis (Choose one)



Question 6:
Diagram 6.1 and Diagram 6.2 show food labels found on two different brands of chilli sauce.

Diagram 6.1




Diagram 6.2


(a) Based on Diagram 6.1 and Diagram 6.2,
(i) Which food label follows the Food Regulations 1985?
(ii) Give one reason for your answer in 6(a)(i). [2 marks]

(b)(i) Which substance is used as preservative in brand W chilli sauce?
(ii) State one function of the preservative in 6(b)(i). [2 marks]

(c) Both brands use artificial colouring in their product.
Do you agree with the use of artificial colouring in food?
Justify your answer. [2 marks]


Answer:
(a)(i)
Chilli sauce brand V

(a)(ii)
Has expiry date.

(b)(i)
Vinegar/ Sodium benzoate

(b)(ii)
Prevent growth of bacteria

(c)
Agree
– Make food more attractive
Or
Disagree
– Cause cancer/ Damage kidney

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