10 chemistry questions - The Science Site

1. What colour is sulphur?

Blue

Yellow

White

Black

2. Why does iron go a pinky-brown when it touches copper sulphate solution?

Because iron is more reactive than copper and so reacts with the copper sulphate, (displacing the copper from the solution)

Because the iron forms a thin layer of iron oxide (rust) on the surface

Because copper is more reactive than iron

3. Fill in the missing word from the equation shown below:
Acid + metal → salt + ............

Oxygen

Salt

Base

Hydrogen

4.

A	B
C	D

Which diagram above contains a Liebig condenser?

A

D

C

B

5. Name a chemical that turns into a purple vapour when heated

Iodine

Chlorophyll

Salt

Chalk

6. Which of the properties of metals listed below is not correct?

Metals are good electrical conductors

Metals are usually ductile

Metals are usually malleable

Metals are good thermal insulators

7. Which of the options below about the properties of a liquid is correct

The shape of a liquid changes according to the container it is in

The shape of a liquid does not change

The volume of a liquid is the same as the container it is in

A liquid can be compressed.

8. What is the chemical symbol for gold?

Au

Ga

Sn

G

9. The substance found in pencil 'leads' is made from

Sodium

Mercury

Lead

Graphite

10. What colour will universal turn when mixed with vinegar?

Green

Blue

Orange

Purple