Chemistry
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
P — The temperature of the solution increases.
Q — The temperature of the solution decreases.
R — The temperature of the solution remains the same.
S — Salt formation takes place.
Only P
P and R
Q and R
P and S
Answer
P and S
Reason — When a solution of an acid is mixed with a solution of a base, it forms salt and water. This is referred to as neutralization reaction. Neutralization reactions are also exothermic reactions. Hence the temperature of the solution increases.
For example :
NaOH + HCl ⟶ NaCl + H2O + Heat
Related Questions
Aman performed the following four experiments
The experiments in which the blue colour of the solution will fade are :
P and Q
P, Q and R
Q and R
Q, R and S
Assertion (A): Zinc can displace copper from aqueous copper sulphate solution.
Reason (R): Copper is placed above zinc in the reactivity series.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): In a redox reaction, the electron gaining species acts as a reducing agent.
Reason (R): Oxidation and reduction reactions occur simultaneously in redox reaction.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.