Page 18 - 1202 Question Bank Chemistry Form 4 KSSM

(c) Diagram 4.2 shows a lady is removing her nail polish using acetone.

Acetone

Diagram 4.2
Based on the diagram, answer the following.
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(i) Explain why acetone is suitable to be used to remove the nail polish. [2 marks]

(ii) Can water replace acetone to remove the nail polish? Give your reason. [2 marks]

5. Table 1 shows the electrical conductivity and melting point of substances P, Q and R.
SPM Table 1
SPM
CLONE
Electrical conductivity in the state of
Substance Melting point (°C)
Solid Molten Aqueous
P No No No < -110
Q No No No 80 – 90
R No Yes Yes > 800

(a) (i) State the type of structure and bonding of substance P. [2 marks]
Structure:
Bonding:

(ii) Explain why substance P has a low melting point but substance R has high melting point.
HOTS Analysing [4 marks]

(b) State how the bonds are formed in:
(i) substance Q. [1 mark]

(ii) substance R. [1 mark]

(c) State why substance R can conduct electricity in molten and aqueous states but not in solid state. [2 marks]

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Question 4: Question 5:
(c) (ii) You need to figure out the type of compound of nail polish. Consider if (a) (i) There are two structures in covalent compound, namely, simple
the compound is able to dissolve in the organic solvent. molecular structure and giant molecular structure. SOS TIP

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