Question

When a red litmus paper is dipped into the soap solution, it turns blue and the reaction is

exothermic.

II. When a blue litmus paper is dipped into the soap solution, its colour does not change and

the reaction is exothermic.

III. When a red litmus paper is dipped into the soap solution, its colour does not change and

the reaction is endothermic.

IV. When a blue litmus paper is dipped into the soap solution, its colour does not change and

the reaction is endothermic. Which of the above statements are correct?

(a) I and II

(b) II and III

(c) III and IV

(d) I and IV​

Answer 1

Answer:

Soap solution is basic in nature and saponification is an exothermic reaction. Therefore, the red litmus paper is turned to blue. Color of the blue litmus paper does not change when it is dipped in the soap solution. A student prepared 20% sodium hydroxide solution in a beaker containing water.

Explanation:

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Answer 2

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