Answer:
Can you tell me the question in the comments on this answer or like how you do it then ill answer you in the comments under this answer
 
        
             
        
        
        
Answer: B 
Explanation:
Graph 1 represents an endothermic reaction, Graph 2 represents an exothermic reaction. 
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Boiling point of a compound is determined by the strength of intermolecular forces of attraction between the molecules present in it. Stronger the intermolecular forces of attraction, higher will be the boiling point.
Ionic compounds show ion-ion interactions which are the strongest among all. Ion-dipole interactions are shown when ionic solutes are dissolved in polar solvents. Hydrogen bonding is also a relatively stronger force that is present between H atom and an electronegative atom like F, O and N(
) . All polar molecules show dipole-dipole interaction (
and 
). Dispersion forces are the weakest intermolecular forces due to momentary dipoles between electron clouds and nucleus.
Among the given compounds, 
has dispersion forces as the major intermolecular forces of attraction. So they they exhibit the weakest IMF, hence have the lowest boiling point.
 
        
                    
             
        
        
        
First one is true second one is False
        
             
        
        
        
Sandy soil because the sand will erode faster then the clay will causeing the well to cave in