Question

question 13 (1 point) based on the vsepr theory, which one of the following molecules is linear? so2 no2 - pcl5 hcn bf3 question 14 (1 point) the geometry of the icl2 - molecule is best described as: bent tetrahedral t - shaped linear triangular planar

Explanation:

Step1: Recall VSEPR theory basics

VSEPR (Valence - Shell Electron - Pair Repulsion) theory predicts molecular geometry based on the number of bonding and non - bonding electron pairs around the central atom.

Step2: Analyze $ICl_2^-$

The central iodine atom in $ICl_2^-$ has 7 valence electrons. It forms 2 bonds with chlorine atoms and has 3 lone pairs. The total number of electron - pair groups around iodine is 5 (2 bonding + 3 non - bonding). According to VSEPR, with 5 electron - pair groups and 3 lone pairs, the molecular geometry is linear.

Step3: Analyze $SO_2$

Sulfur in $SO_2$ has 6 valence electrons, forms 2 double bonds with oxygen and has 1 lone pair. The electron - pair geometry is trigonal planar and the molecular geometry is bent.

Step4: Analyze $NO_2^-$

Nitrogen in $NO_2^-$ has 5 valence electrons, forms 2 bonds with oxygen and has 1 lone pair. The electron - pair geometry is trigonal planar and the molecular geometry is bent.

Step5: Analyze $PCl_5$

Phosphorus in $PCl_5$ has 5 valence electrons, forms 5 bonds with chlorine atoms. The molecular geometry is trigonal bipyramidal.

Step6: Analyze $BF_3$

Boron in $BF_3$ has 3 valence electrons, forms 3 bonds with fluorine atoms. The molecular geometry is trigonal planar.

Answer:

Question 13: HCN
Question 14: linear