Chapter 7 Practice Paper: Particulate Nature of Matter — question paper

Section A: Multiple-choice questions[10 marks]

Answer all questions. For each question, write the letter (A, B, C or D) of the correct answer in the brackets provided.

1. 1

   Particles in a solid

   1. Avibrate in fixed positions, close together.
   2. Bare far apart and move freely.
   3. Chave no movement at all.
   4. Dare destroyed when the solid is cut.
   ( )
2. 2

   Which words best describe the particles of a gas?

   1. Aparticles in fixed rows, touching
   2. Ba fixed shape
   3. Cparticles far apart, moving quickly in all directions
   4. Dparticles that cannot diffuse
   ( )
3. 3

   A drop of food colouring sits at the bottom of a beaker of cold, still water. An hour later the colour has spread upwards. The colour particles have shown a net movement from

   1. Athe pale top of the beaker back into the drop only.
   2. Bthe concentrated drop into the rest of the water.
   3. Ca solid crystal that cannot move.
   4. Da magnet to the cold water.
   ( )
4. 4

   A sealed tin of soup is warmed in a pan of hot water. The tin bulges slightly. The mass of the sealed tin

   1. Aincreases, because the tin is larger.
   2. Bfalls to zero.
   3. Cbecomes equal to the volume of the soup.
   4. Dstays the same.
   ( )
5. 5

   When ice melts,

   1. Aa new substance is formed.
   2. Bthe particles stop moving.
   3. Cthe particles change from vibrating in fixed positions to being able to slide past each other.
   4. Dthe mass disappears.
   ( )
6. 6

   Wet sports kit dries on a cool, windy balcony even though the water never reaches 100 °C. This shows that

   1. Athe water has turned into a new element.
   2. Bparticles can leave the surface of the water below the boiling point.
   3. Cwater dries only when it boils throughout the cloth.
   4. Dthe mass of the water becomes zero while the cloth is still soaking.
   ( )
7. 7

   A flexible balloon of air is warmed gently. It becomes larger mainly because the particles

   1. Abecome heavier.
   2. Bturn into a new element.
   3. Cstop moving.
   4. Dmove faster and spread further apart.
   ( )
8. 8

   A liquid has

   1. Aa fixed shape and a fixed volume.
   2. Ba fixed volume, and it takes the shape of the bottom of its container.
   3. Cno fixed volume.
   4. Dparticles in a regular lattice that cannot move.
   ( )
9. 9

   A worksheet uses circles to stand for the particles in an ice cube. Those circles are

   1. Aa model, not a photograph of the particles.
   2. Bthe actual size of atoms drawn to scale.
   3. Ccells.
   4. Dbubbles of air that must be touching in a gas.
   ( )
10. 10

    A drop of perfume evaporates at the surface of the liquid, but the liquid is not boiling. This shows that

    1. Aparticles only move when a liquid boils.
    2. Bthe mass of a gas is zero.
    3. Csome particles leave the surface before the liquid boils.
    4. Ddiffusion is from low concentration to high concentration.
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided. Show your working for calculations.

1. 1

   Orange squash fills a glass. A student in the next room can smell the squash a minute later.

   1. (a)

      Use particles to explain why the squash keeps nearly the same volume but matches the shape of the glass.

      [2]
   2. (b)

      Use particles to explain how the smell reaches the next room.

      [2]
   3. (c)

      State whether a new substance must form before the smell can travel.

      [1]
2. 2

   A pale blue crystal is placed at one end of a trough of still water. After a day the water is blue all along the trough.

   1. (a)

      Explain how the blue colour moves along the trough when nobody stirs the water.

      [2]
   2. (b)

      Predict how the time taken would change if the trough were warmer, and give a reason.

      [2]
   3. (c)

      State whether the blue colour appearing along the trough means a new element has formed.

      [1]
3. 3

   A pat of butter in a closed jar has a mass of 80 g and a volume of 100 cm³. The jar is left in the sun until the butter melts. Nothing leaves the jar. The melted butter has a volume of 125 cm³.

   1. (a)

      State the mass of the butter after it has melted.

      mass =g[1]
   2. (b)

      Calculate the density of the solid butter.

      density =g/cm³[2]
   3. (c)

      Calculate the density of the melted butter.

      density =g/cm³[2]
   4. (d)

      State what melting has done to the spacing of the butter particles.

      [1]
4. 4

   A poster of a gold ring shows the ring’s particles as widely spaced dots with large gaps, like a gas in a box.

   1. (a)

      State two ways the poster misdraws the particles in the solid ring.

      [2]
   2. (b)

      The poster claims the ring gets lighter when a lamp warms it, because the particles start to move. Explain why the claim is wrong.

      [2]