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chemistry igcse acapprinted 132 · PDF 132
145 pagesrevision 46934
printed 132 · PDF 132
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132
Q10. 0620_w23_qp_22
ANS: The correct answer is B, because The potassium ions in KI have a +1 charge, meaning they lose an
electron and thus have more protons than electrons. A is incorrect because electron sharing only occurs in
covalent bonds, whereas potassium iodide has ionic bonding (between a metal and a non-metal). C is not
correct because potassium iodide is an ionic compound, not a covalent one. D is not correct because all ionic
compounds have relatively high melting points.
Q11. 0620_w23_qp_22
ANS: The answer is B, because Methanol is a simple covalent compound, which have the weakest bonds out
of all the types. A and C are incorrect because they are giant covalent structures and have more bonds and
thus are bonded more strongly together. D is incorrect because sodium chloride is an ionic compound that
has a high melting and boiling point.
Q12. 0620_w22_qp_22