Matter Revision set 5

A student has a measuring cylinder containing water and also has a balance. Which of these could she use to find the volume of a small metal sphere? She has no other apparatus.

• either the measuring cylinder containing water or the balance

• only the balance

• only the measuring cylinder containing water

• neither the measuring cylinder nor the balance

Answer explanation

The difference the volume readings before and after placing the metal sphere in the measuring cylinder gives the volume of the sphere.

Which statement correctly describes a change of state?

• A gas condenses to form a liquid.

• A liquid melts to form a solid.

• A solid condenses to form a liquid..

• A solid boils to form a gas.

Answer explanation

A liquid boils to form a gas.

A solid melts to form a liquid.

The diagram shows some liquid in a measuring cylinder. The mass of the liquid is 16 g.

What is the density of the liquid?

• 0.80 g/cm³

• 1.25 g/cm³

• 36 g/cm³

• 320 g/cm³

Which row gives the correct name for each change of state shown?

• A

• B

• C

• D

Answer explanation

solidification means the same as freezing

In the atomic model, an atom consists of a central mass, orbited by much smaller particles.

What is the name of the central mass and of the orbiting particles?

• A

• B

• C

• D

Answer explanation

Key facts about the structure of the atom!

In an experiment, an object is heated. The data from the experiment is shown.

● The energy transferred to the object is 3.0 kJ.

● The mass of the object is 2.0 kg. ● The rise in temperature of the object is 10 °C.

What is the specific heat capacity of the object?

• 0.15 J/(kg °C)

• 300 J/(kg °C)

• 150 J/(kg °C)

• 0.30 J/(kg °C)

Answer explanation

The diagrams show four solid blocks with their dimensions and masses. Which block has the greatest density?

• A

• B

• C

• D

The diagram shows the changes of state P, Q, R and S that occur in solids, liquids and gases when they gain or lose thermal energy.

What is the name of change R?

• condensation

• freezing

• boiling

• melting

Answer explanation

P = melting (solid - liquid)

Q = boiling (liquid - gas)

S = freezing (liquid - solid)

Diagram 1 shows a measuring cylinder containing water. A metal weight with a cork attached by a thread is held above the water. Diagram 2 shows the apparatus after the weight has been lowered into the water. Diagram 3 shows the apparatus after the weight and the cork have been submerged.

What is the volume of the cork?

• 20 cm³

• 30 cm³

• 40 cm³

• 70 cm³

Answer explanation

Difference in readings is 20 cm³

(45-25)

Which row describes the process of condensation?

• A

• |B

• C

• D

Answer explanation

Particles in a liquid are closer together than the particles in a gas.