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Types of Substance Practice Questions

Question 1

3 marks

Poly(ethene) is a polymer. It is made from ethene and is used to make plastic bags and bottles.

(a)

Describe the structure of a poly(ethene) molecule.

(b)

Poly(ethene) does not conduct electricity.

Explain why.

Question 2

3 marks

Figure 1 shows some properties of four elements, A, B, C and D.

element melting point in °C appearance at room temperature electrical conductivity as a solid
A 1535 shiny grey solid good
B 113 dull yellow solid poor
C 1083 shiny brown solid good
D 660 shiny grey solid good
(a)

Which element is a non-metal?

Put a cross ( ☒ ) in the box next to your answer.

☐ A element A

☐ B element B

☐ C element C

☐ D element D

(b)

Apart from the properties given in Figure 1, state two other physical properties that are typical of most metals.

Question 3

3 marks

Figure 2 shows some properties of four substances, P, Q, R and S.

substance melting point in °C solubility in water conducts electricity as a solid conducts electricity when molten
P −101 insoluble no no
Q 1074 soluble no yes
R 1455 insoluble yes yes
S 1610 insoluble no no
(a)

Which substance is an ionic compound?

Put a cross ( ☒ ) in the box next to your answer.

☐ A substance P

☐ B substance Q

☐ C substance R

☐ D substance S

(b)

Deduce the type of structure present in substance S.

Use the information in Figure 2 to explain your answer.