Answer:
B
Explanation:
i think with exothermic reactions heat is released
this is what i looked up 
hope this helps i took chem last year and think this is what i learned 
 
        
             
        
        
        
Mercury naturally exists in Liquid state.
On Condensing it can exist in Solid state as well.
Hope it helps...
Regards;
Leukonov/Olegion.
 
        
                    
             
        
        
        
In a 0.01 M solution of HCl, Litmus will be red. Litmus paper will turn into red in acidic conditions. Hydrochloric acid is an acid. Litmus is an indicator for acidity and alkalinity made from inchens.