States of Matter Practice Questions

Which substance is a gas at $25\ ^\circ\mathrm{C}$?

• A W
• B X
• C Y
• D Z

State the physical state of substance Y at $200\ ^\circ\mathrm{C}$.

Substance W is cooled from $20\ ^\circ\mathrm{C}$ to $-50\ ^\circ\mathrm{C}$. Name the change of state that takes place.

Name the change of state taking place in change C.

Give the letters of the two changes that are physical changes.

Explain why change B is a chemical change.

Magnesium ribbon is burned in oxygen at room temperature to form solid magnesium oxide.

Add the missing state symbols to the equation for this reaction.

$2\mathrm{Mg}(\text{................}) + \mathrm{O_2}(g) \rightarrow 2\mathrm{MgO}(\text{................})$

Zinc reacts with dilute hydrochloric acid to form zinc chloride solution and hydrogen gas.

Complete the balancing of the equation for this reaction and add the state symbols for each substance.

$\ldots\ \mathrm{Zn}(\ldots) + \ldots\ \mathrm{HCl}(\ldots) \rightarrow \ldots\ \mathrm{ZnCl_2}(\ldots) + \ldots\ \mathrm{H_2}(\ldots)$

Which diagram, A, B or C, shows the particles in a gas?

Describe the arrangement and the movement of the particles shown in diagram A.

Name the change of state that takes place when the substance changes from the state shown in diagram C to the state shown in diagram B.

State what is meant by a physical change.

Explain, in terms of the energy, movement and arrangement of the water particles, what happens as the water vapour condenses on the cold window.

A student measures the volume of carbon dioxide produced when calcium carbonate reacts with dilute hydrochloric acid. The reaction gives out heat. The apparatus and its contents are allowed to cool to room temperature before the final volume of gas is measured.

Explain why this is done.

A wet football shirt hung outside at $15\ ^\circ\mathrm{C}$ becomes completely dry, even though the boiling point of water is $100\ ^\circ\mathrm{C}$.

Explain, in terms of particles, how the shirt dries.

Use the graph to find the melting point of the substance.

State which physical state, or states, of the substance are present between $2$ minutes and $6$ minutes.

Explain the shape of the cooling curve in terms of the energy, movement and arrangement of the particles.