| S. No. | Reagents | Compound P | Compound Q | Compound R |
| 1. | \[NaHC{{O}_{3}}\]solution | Brisk effervescence | No reaction | No reaction |
| 2. | Red litmus solution | No reaction | Red litmus turned blue | No reaction |
| 3. | Sodium metal test | Gas produced which burns with a pop sound | No reaction | Gas produced which burns with a pop sound |
A) Methane, methanol and methyl methanoate
B) Ethanoic acid, soap solution and ethanol
C) Ethanoic acid, ethyl ethanoate and ethanol
D) Methane, methanal and methanoic acid.
Correct Answer: B
Solution :
\[C{{H}_{3}}COOH+NaHC{{O}_{3}}\to C{{H}_{3}}COONa\]\[+{{H}_{2}}O+C{{O}_{2}}\] \[C{{H}_{3}}COOH+Na\to C{{H}_{3}}COONa+1/2{{H}_{2}}\] \[C{{H}_{3}}C{{H}_{2}}OH+Na\text{ }\to \text{ }C{{H}_{3}}C{{H}_{2}}ONa+1/2{{H}_{2}}\] Soaps are basic in nature as they are sodium salts of higher fatty acids hence, they turn red litmus blue.
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