ChemSino State of matter worksheet

which statement is not correct

• energy is released when a liquid changes into a solid

• particles move faster in the gaseous state than in the liquid state

• the carbon atoms in gaseous methane are further apart than those in solid diamond

• there is a large decrease in the volume of a solid metal when pressure is applied to it

The apparatus shown is set up. After 20 minutes a white rimg of ammonium chloride is seen at position Y. Which statement aout the molecules of ammonia and hydrogen chloride is correct?

• molecules in ammonia have a larger Mr than molecules of hydrogen chloride and so they move more slowly

• molecules in ammonia have a larger Mr than molecules of hydogen chloride and so they move more quickly

• molecules in ammonia have a smaller Mr than molecules of hydogen chloride and so they move more slowly

• molecules in ammonia have a smaller Mr than molecules of hydogen chloride and so they move more quickly

a bottle of aqueous ammonia is placed on a table in a corner of the laboratory. the stopper is removed and after a few minutes all the students in the room can smell the ammonia. which process occurs?

• brownian motion

• diffusion

• dissolving

• distillation

in which change of state do the particles become more widely separated?

• gas to liquid

• gas to solid

• liquid to gas

• liquid to solid

a shirt is stained with red ink from a pen. The shirt is left to soal in a bowl of water. which process causes the red colour to spread?

• diffusion

• evaporation

• melting

• neutralisation

the diagram shows how the molecules in the exhaust gases diffuse into the air. which statement describe what happens to these molecules next?

• the molecules fall to the ground because they are hevier than air molecules

• the molecules go back together as they cool

• the molecules spread further into the air

• the molecules stay where they are

At room temperature, in which substance are the particle furthes apart?

• H2

• H2O

• Mg

• MgO

In which of the following are the particles arranged in a regular pattern?

• a gas

• a liquid

• a metal

• a solution

some students are asked to describe differences between gases and liquids. Three of their suggestion are:

1. gas molecules are further apart
2. gas molecules are smaller
3. liquid molecules vibrate around fixed positions.

Which suggestion are correct?

• 1 only

• 2 only

• 3 only

• 1,2,3

when there is no wind,the scent of flower can be detected more easily on a warm evening than on a cold evening. This is because the molecules of the scent .........1 ........ 2 than in colder conditions. Which words correctly complete gaps 1 and 2

• gap 1 condense ; gap 2 nearer to the flowers

• gap 1 condense ; gap 2 further from the flowers

• gap 1 diffuse ; gap 2 nearer to the flowers

• gap 1 difuse ; gap 2 further from the flowers