KS3 Chemistry Quiz 1

The particles are arranged regularly and packed closely in a/an (choose all)

• solid

• liquid

• gas

The temperature at which a liquid freezes is called as

(a)  

The particles in which of the three would have the highest kinetic energy? Choose one.

• solid

• liquid

• gas

Choose all correct options:

• Evaporation occurs only at boiling point

• Boiling occurs only at boiling point

• There is no substance that can directly go from a solid to a gas

• The reverse of sublimation is deposition

Dry ice is solid (choose one)

• CO₂

• He

• O₂

• N₂

A substance whose boiling point is 50C is currently at 75C. Which state(s) could it be at? Choose all.

• solid

• liquid

• gas

The spreading out of particles in a gas or liquid is known as

(a)  

If salt is dissolved in water, then (choose all):

• salt is the solute

• water is the solute

• salt is the solvent

• water is the solvent

• salt is the solution

Assume that you want to dissolve salt in water and you've mixed as much as possible, but there is still some salt left. Which of the following would dissolve the salt? Choose one.

• Doing nothing

• Boiling the water

• Freezing it

• Drinking the water

For which of the following temperatures in Celsius would the solubility of NaCl be the most? Choose one.

• -100

• 30

• 70

• 100