MCQ
A student prepared 20% sodium hydroxide solution in a beaker to study saponification reaction. Some observations related to this are given below:
- Sodium hydroxide solution turns red litmus blue.
- Sodium hydroxide readily dissolves in water.
- The beaker containing solution appears cold when touched from outside.
- The blue litmus paper turns red when dipped into the solution.
The correct observations are:
- AI, II and IV.
- BI, II and III.
- Conly III and IV.
- Donly I and II.