Document page
chemistry igcse acapprinted 130 · PDF 130
145 pagesrevision 46934
printed 130 · PDF 130
Page image rendered from the stored file at 110 dpi; it sharpens as you zoom. Outlines are placed from each region’s stored position on the page (612 × 792 pt).
readable
Source of this text: embedded text layer. The better of the embedded text and OCR is kept.
130
Q6. 0620_s23_qp_23
ANS: The correct answer is C, because Silicon(IV) oxide is a compound that exists as a giant covalent
structure, and due to the high number of covalent bonds keeping the structure together, also has a high
melting point.
Q7. 0620_s23_qp_23
ANS: The correct answer is D, because Solid metals are made up of positive metal ions in a sea of delocalized
electrons, and are malleable due to this property that allows them to slide over each other. A is not correct
because the metal ions that make up the lattice are positive, not negative. B is incorrect due to the same
reason. C is not correct because in a solid metal, only the delocalized electrons can move freely through the
solid, while the metal ions cannot.