Which is most likely an example of an angular molecule? NH_(3) H_(2)O SiCl_(4) H_(2)CO

The most likely example of an angular molecule among the given options is $H_{2}CO$ (formaldehyde).<br /><br />Explanation:<br />- $NH_{3}$ (ammonia) has a trigonal pyramidal shape due to the presence of a lone pair of electrons on the nitrogen atom.<br />- $H_{2}O$ (water) has a bent or angular shape due to the presence of two lone pairs of electrons on the oxygen atom.<br />- $SiCl_{4}$ (silicon tetrachloride) has a tetrahedral shape with no lone pairs on the silicon atom.<br />- $H_{2}CO$ (formaldehyde) has a trigonal planar shape with no lone pairs on the carbon atom.<br /><br />Therefore, the correct answer is $H_{2}CO$.