While studying saponification reaction, a student measures the temperature of the reaction mixture and also finds its nature using blue/red litmus paper. On the basis of his observations the correct conclusion would be(A) the reaction is exothermic and the reaction mixture is acidic.(B) the reaction is endothermic and the reaction mixture is acidic.(C) the reaction is endothermic and the reaction mixture is basic.(D) the reaction is exothermic and the reaction mixture is basic.

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Solution

(C) the reaction is endothermic and the reaction mixture is basic.
It’s an endothermic reaction meaning it absorbs surrounding heat.
Formation of soap that is saponification involves base (usually sodium hydroxide, NaOH) hydrolysis of triglycerides, which are esters of fatty acids, to form the sodium salt of a carboxylate. Hence reaction mixture is basic.

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Similar questions

Q. While studying saponification reaction, a student measures the temperature of the reaction mixture and also finds its nature using blue/red litmus paper. On the basis of his observations the correct conclusion would be:

Read the following statements

(i) When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.

(ii) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic

(iii) When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.

(iv) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.

Which of the above statements are correct

Q. Read the following statements:
I. When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.
II. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic.
III. When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
IV. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
Which of the above statements are correct?

Q. A student puts a drop of the reaction mixture of a saponification reaction first on a blue litmus paper and then on a red litmus paper. He may observe that:

Q. Assertion: On cooling in a freezing mixture, colour of the mixture turns to pink from deep blue for a reaction.

C O (H_{2} O)_{6}^{2 +} (a q) + 4 C l^{⊝} (a q) ⇌ C o C l_{4}^{2 -} (a q) + 6 H_{2} O (l)

(Pink) (Blue)
Reason: The reaction is endothermic in forward reaction, so on cooling the reaction, deep blue colour appears.

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