Q.Match the pairs from column A and B.
Column A: BCl3, SiO2, CO2
Column B: Angular molecule, linear covalent molecule, Tetrahedral molecule, Planar trigonal molecule

Step 1. BCl3. Section 9.7.1: boron is sp2 hybridised, giving BCl3 a trigonal planar shape with 120° bond angles → matches 'Planar trigonal molecule'.

Step 2. SiO2. Section 9.7.5: silica is a covalent 3-D network built from SiO4 tetrahedra, each silicon tetrahedrally bonded to four oxygens → matches 'Tetrahedral molecule'.

Step 3. CO2. Carbon dioxide's carbon is sp hybridised with two C=O double bonds arranged at 180° (this is standard, well-established structural chemistry, not explicitly detailed in this chapter's own running text beyond listing CO2 as a group-14 oxide in Table 9.6) → matches 'linear covalent molecule'. …

Matching each compound's known/described molecular geometry (sections 9.7.1, 9.7.5, and standard chemistr …

• Trying to force a match for 'Angular molecule' onto one of the three compounds; the column sizes (3 vs 4) signal t …