Skip to content
CIE Nov 2013 v2 Paper 4 Q2
Answers available below
Show answer
Question
1
2
3
4
5
6
7
8
9
![Examiners For Use (a) The melting points of some Group IV elements are given below. element melting point / K Si Ge Sn 3925 1683 1210 505 Suggest an explanation for each of the following. (i) The melting point of silicon is less than that of carbon.(ii) The melting point of tin is less than that of germanium.[2] (b) Using data from the Data Booklet where appropriate, write equations for the following reactions of compounds of Group IV elements. (i) SiCl 4(l) + H2O(l)(ii) the action of heat on PbCl 4(l)(iii) SnCl 2(aq) + FeCl 3(aq)(iv) SnO2(s) + NaOH(aq)[4] [Total: 6]UCLES 2013 9701/42/O/N/13 [Turn over<br />](https://learnah.org/wp-content/uploads/2018/08/November_2013_v2_QP_-_Paper_4_CIE_Chemistry_A-level_2.jpg)
![[1] [1] [2] [1] [1] [1] [1] [4] [Total: 6] Page 3 Mark Scheme Syllabus Paper GCE A LEVELOctober/November 2013 9701 42 (a) (i) Si-Si bonds are weaker (than C-C bonds) (ii) metallic (Sn) is weaker than (giant) covalent (Ge) (b) (i) SiCl 4 + 2H2OSiO2 + 4HCl or SiCl 4 + 4H20Si(OH)4 + 4HCl or SiCl 4 + 3H20H2SiO3 + 4HCl (partial hydrolysis is not sufficient e.g. to SiCl 3OH + HCl) (ii) PbCl 4PbCl 2 + Cl (iii) SnCl 2 + 2FeCl 3SnCl 4 + 2FeCl (iv) SnO2 + 2NaOHNa2SnO3 + H2O or SnO2 + 2NaOH + 2H2ONa2Sn(OH)6 or ionic equation SnO2 + 2OHSnO3 + H2OCambridge International Examinations 2013<br />](https://learnah.org/wp-content/uploads/2018/08/November_2013_v2_MS_-_Paper_4_CIE_Chemistry_A-level_2.jpg)