Standard 10th Science Experiment 12 Answer Solutions: Study of the oxidation and addition reactions of carbon compounds Answer Solutions.
Aim :
To study the oxidation and addition reactions of carbon compounds.(A) Oxidation of Ethanol (B) Addition reaction of fatty acids
Requirements :
Test tubes, Burner, measuring cylinder, dropper, ethanol, dilute solution of sodium carbonate,dilute solution of potassium permanganate, tincture iodine solution, vanaspati ghee, vegetable oils like groundnut, safflower, sunflower oil.
(A) Oxidation of EthanolProcedure :
(1) Take 2-3 ml of ethanol in a test tube. Add 5 ml of sodium carbonate solution to it. Warm the mixture. (2)
Add a few drops of the dilute solution of potassium permanganate to the warm mixture with constantstirring.
(3) Observe the change in the pink colour of potassium permanganate immediately after its addition started.
Observations :
(1) When a solution of potassium permanganate is added to ethanol, in the beginning the pink colourdisappears. (2) When addition is continued further, the pink colour does not vanish but remains as it is
Multiple Choice Quetions
Choose the correct alternative and write its letter (A), (B), (C), (D) in the box :
1. – C –O OH is called .
(A) carboxylic acid group
B) aldehyde group
(C) ketonic group
(D) alcohol group
Answer: A
2. contains alcoholic functional group.
(A) H – C – OHHH
(B) CH3 – C – HHOH
(C) CH3 – C – CH3OHCH3
(D) all of these
Answer: D
3. In the reaction of oxidation of ethanol, KMnO4 oxidises ethanol in .
(A) acidic medium
(B) alkaline medium
(C) neutral medium
(D) strong acidic medium
Answer: B
4. The organic compounds having double or triple bonds in them are termed as .
(A) saturated compounds
(B) stable compounds
(C) volatile compounds
(D) unsaturated compounds
Answer: D
5. Due to , vegetable oil is converted into vanaspati ghee.
(A) Hydrogenation
(B) Chlorination
(C) Dehydration
(D) Polymerization
Answer: A