Question

A student Prepared 20% sodium hydroxide solution in a beaker to study saponification reaction. Some observations related to this are given below : (I) Sodium hydroxide solution turns red litmus blue (II) Sodium hydroxide readily dissolves in water (III) The beaker containing solution appears cold when touched from outside (IV) The blue litmus paper turns red when dipped into the solution The correct observations are : (A) I, II and IV (B) I, II and III (C) only III and IV (D) only I and II

Answer 1

D option is correct as NaOH is a base and it turns red litmus blue & it dissolves in water . it is exothermic reaction so the beaker become hot when touch.

Answer 2

Sodium hydroxide is basic in nature, in the form of white pellets and soluble in water. Being basic it turns red litmus blue.

So the correct option is:-

(D) I,II,IV