question_answer 19)

What happens when a solution of an acid is mixed with a solution of a base in a test tube?                 (i) The temperature of the solution increases.                 (ii) The temperature of the solution decreases.                 (iii) The temperature of the solution remains the same.                 (iv) Salt formation takes place.                   (a) Only (i)                           (b) (i) and (iii)                                     (c) (ii) and (iii)                    (d) (i) and (iv)                

Answer:

(d) When an acid reacts with a base, neutralization reaction takes place to form salt and water and it is an exothermic reaction. So, the temperature of the solution increases.