Page 4 - ACE YR IGCSE A TOP APPROACH TO CHEM
P. 4
1 States of Matter
Part 1: Multiple-choice Questions
Answer all questions. For each question, there are four possible answers. Choose the best and correct answer.
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Clone May / June 2015 A Durian particles diffuse from a region
of higher concentration to a region of
1 The changes that occur when a substance lower concentration and the smell of
changes its states are shown below. durian is detected by our nose.
W X B Durian particles condense and the
solid liquid gas
Z Y smell of durian is detected by our nose.
Which process, W, X, Y, or Z, occurs in C Air particles diffuse from a region of
each of the following situations? higher concentration to a region of
1 Candle melts. lower concentration and the smell of
2 The level of water in a pool reduces durian is detected by our nose.
under the hot sun. D Durian particles diffuse from a region
3 Ice cubes form in a freezer. of lower concentration to a region of
4 Moisture beads on car windows. higher concentration and the smell of
durian is detected by our nose.
1 2 3 4
5 At room temperature, particles are further
A W X Y Z apart. Which of the following could be the
B W X Z Y particles?
A NaCl
C Y Z X W B Al O 3
2
D X Y Z W C SO 2
D SiO
2
2 In which of the following do the particles 6 The melting and boiling points of four
slide past each other at room temperature? substances are shown. Which substance is
A hand sanitiser in the bottle a liquid at 35°C?
B copper wire of an air conditioner
C methane gas in a household tank substance melting boiling
D plastic of a food container point / °C point / °C
A –210 –196
Clone Oct / Nov 2015 B –150 –29
3 In which of the following changes of the C 39 256
states do the particles change from ‘closely D 30 2203
arranged’ to ‘moving in all directions’?
A gas to liquid C gas to solid 7 Which of the following statements best
B liquid to solid D solid to gas explains the Brownian motion?
A Haze particles move in the air.
4 We can smell the durian from a stall B An apple drops on the floor.
10 metres away from us. Which statement C Water flows down the waterfall.
correctly explains the situation?
D Sand blows by the wind.
Chapter 1 States of Matter 1
Chapter 1.indd 1 3/4/22 11:57 AM
