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Solution - Chemicals from Common Salt - Sodium Hydroxide

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ConceptChemicals from Common Salt - Sodium Hydroxide  

Question

We need 20% aqueous solution of sodium hydroxide for the study of saponification reaction. When we open the lid of the bottle containing solid sodium hydroxide we observe it in which form?

(A) Colourless transparent beads

(B) Small white beads

(C) White pellets/flakes

(D) Fine white powder

Solution

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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

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Solution for concept: Chemicals from Common Salt - Sodium Hydroxide. For the course 8th-10th CBSE
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