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A Student Prepared 20% Sodium Hydroxide Solution in a Beaker Containing Water. the Observations Noted by Him Are Given Below. - Science

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ConceptChemicals from Common Salt - Sodium Hydroxide

Question

A student prepared 20% sodium hydroxide solution in a beaker containing water. The observations noted by him are given below. 

I. Sodium hydroxide is in the form of pellets.

II. It dissolves in water readily.

III. The beaker appears cold when touched from outside.

IV. The red litmus paper turns blue when dipped into the solution.

The correct observations are:

(A) I, II, and III

(B) II, III and IV

(C) III, IV and I

(D) I, II and IV

Solution

(D)

Sodium hydroxide is in the form of pallets and it readily dissolves in water to form a solution. As it is basic in nature, it turns red litmus paper blue.

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Solution A Student Prepared 20% Sodium Hydroxide Solution in a Beaker Containing Water. the Observations Noted by Him Are Given Below. Concept: Chemicals from Common Salt - Sodium Hydroxide.
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