CIE iGCSE Co-Ordinated Science C1.1 Solids, liquids and gases Exam Style Questions Paper 4
Question
The arrangement and movement of particles in solids, liquids and gases are different.
(a) Draw one line from each state of matter to the arrangement and movement of particles.
(b) A student tests the melting point of four different solids.
Table 2.1 shows their results.
State which of the four solids, A, B, C or D, is a mixture. Explain your answer.
(c) Table 2.2 shows the relative molecular mass, M$_{r}$ , of three different gases.
State which gas will diffuse fastest. Explain your answer.
(d) Sulfur dioxide is a common pollutant in the air.
(i) State the source of sulfur dioxide in the air.
(ii) State an adverse effect of sulfur dioxide in the air.
(e) Sulfur is used in the manufacture of sulfuric acid in the Contact Process.
Complete and balance the equations for the Contact Process.
$S+O_{2}\overset{}{\rightarrow}SO_{2}$
$2SO_{2}+……..\rightleftharpoons…..SO_{3}$
$……+SO_{3}\overset{}{\rightarrow}H_{2}S_{2}O_{7}$
$H_{2}S_{2}O_{2}+…….\underset{}{\rightarrow}2H_{2}SO_{4}$
▶️Answer/Explanation
Ans : 2(a)
one or two correct for 1 mark
three correct for 2 marks
;;
2(b) (mixture) B ;
(mixtures) melt over a range (of temperatures) / not a fixed / certain / sharp / single (melting) point / more than one (melting)
point ;
2(c) (gas) ammonia / NH3 ;
(ammonia) has the lowest Mr / is the lightest gas ;
2(d)(i) combustion of fossil fuels (containing sulfur compounds) ;
2(d)(ii) any one from:
causes acid rain ;
causes breathing difficulties (asthma) ;
2(e) $2SO_{2}+O_{2}\rightleftharpoons 2 SO_{3}$
$H_{2}SO_{4}+SO_{3}\underset{}{\rightarrow}H_{2}S_{2}O_{7}$
H$_{2}$S$_{2}$O$_{7}$ + H$_{2}$O → 2H$_{2}$SO$_{4}$ ;