1) Which of the following pairs of chlorides consists of giant ionic and simple molecular structure? a) NaCl and MgCl2 b) MgCl2 and PCl5 c) SiCl4 and PCl5 d) AlCl3 and SiCl4 2) Which of the following explain the change in structure from NaCl to PCl5? a) Difference in number of valence electrons b) Difference in electron cloud size c) Difference in electronegativity d) Difference in ionisation energy 3) What is the pH of solution when NaCl and MgCl2 are put in water respectively? a) 7, 3 b) 6.5, 2 c) 7, 6.5 d) 6.5, 3 4) Which of the following is NOT a product obtained when SiCl4 or PCl5 are put in water? a) SiO2 b) H3PO4 c) HCl d) Si(OH)2

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