Consider the following four compounds. What is the order of increasing boiling point of the compounds (lowest first)?

$\quad 1 \rightarrow 4 \rightarrow 2 \rightarrow 3$

$\quad 1 \rightarrow 4 \rightarrow 3 \rightarrow 2$

$4 \rightarrow 1 \rightarrow 2 \rightarrow 3$

$4 \rightarrow 1 \rightarrow 3 \rightarrow 2$

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_s24_qp_12 Year：2024 Question No：8

Answer:

3.5.1.1 $\mathrm{BF}_{3} \text { (trigonal planar, } 120^{\circ} \text { ) }$

3.5.1.2 $\left.\mathrm{CO}_{2} \text { (linear, } 180^{\circ}\right)$

3.5.1.3 $\mathrm{CH}_{4} \text { (tetrahedral, 109.5°) }$

3.5.1.4 $\mathrm{NH}_{3} \text { (pyramidal, 107°) }$

3.5.1.5 $\mathrm{H}_{2} \mathrm{O} \text { (non-linear, } 104.5^{\circ})$

3.5.1.6 $\mathrm{SF}_{6} \text { (octahedral, 90°) }$

3.5.1.7 $\mathrm{SF}_{6} \text { (octahedral, 90°) }$

3.5.2 predict the shapes of, and bond angles in, molecules and ions analogous to those specified in 3.5.1