It also has various other important uses. What can be the Hazards of Acetic Acid?

You can see the inference by clicking on the inference icon. Acetic acid undergoes nearly all carboxylic acid reactions. (b) sodium ethanoate and carbon dioxide gas

(d) Vinegar odour resembles ethanoic acid. Acetic acid solution turns: [Delhi 2011] When carbon dioxide is passed through freshly prepared lime water, the lime water turns milky.

(d) Like all acids ethanoic acid reacts with NaHCO3 to release CO2 gas, water and sodium salt. (b) Baking soda ‘has carbonate ions in it which are released when reacted with acid. Ethanoic acid is the second simplest carboxylic acid. (d) Flammable and explosive, 10. Reaction with sodium bicarbonate: Take a small quantity of sodium bicarbonate solution in a boiling tube. 2. (ii) If we smell the given liquid and the liquid gives a smell like that of vinegar, then the given acid is acetic acid. Dilute the given acetic acid with distilled water in a beaker. 22. Answer: > The members of the homologous series of the carboxylic acids are found in fruits and in vinegar. On adding acetic acid to sodium hydrogen carbonate in a test tube, a student observes: [All India Delhi 2012] Furthermore, it is used in the making of ink and dyes and in rubber and plastic industries. 14. (d) red litmus colourless. Acetic acid is soluble in water because it gets ionised in aqueous solution due to which it is acidic in nature. Answer: The substance (P) and (Q) are: What is the smell of acetic acid? Lung irritation and possible damage to lungs, eyes, and skin may result at 100 ppm. The tube is corked with a double bore cork and a thistle funnel is inserted into the tube.

Cork the tube with a double bore cork and insert a thistle funnel into the tube.

Note: Click on the ‘HELP’ button to see the instructions. On cooling below this temperature, it forms ice-like crystals. (a) suffocating (b) sweet fruit like The candle would extinguish near the mouth of test tube. (d) It is also called glacial acetic acid because it freezes at 16.6°C. (a) Tomato juice In each of the test tubes is added a drop of blue litmus. 30. Test tubes, water, litmus paper, test tube stand, a dropper, a beaker, a cork fit in a test tube with bent tube fixed in it. (c) Functional group of carboxylic acid is—COOH. The odour of ethanoic acid resembles with Prolonged inhalation exposure about eight hours to acetic acid vapors at 10 ppm can produce some irritation of eyes, nose, and throat. Name the compound ‘X’, and the gas evolved.

(b) Functional group of carboxylic acid is—COOH. The hydrogen centre in the carboxyl group (−COOH) in carboxylic acids such as acetic acid can separate from the molecule by ionization:

(c) II and IV (d) I and IV. The acetic acid in vinegar is responsible for its pungent smell and the sour taste.

1.

The gas evolved is CO2 gas. (i) If we put a drop of the given colourless liquid on blue litmus paper, if the blue litmus paper changes to red, then the given acid is acetic acid. Question 5: Here is the structure of acetic acid.

13. The blue colour changes to red indicating the acidic nature of ethanoic acid.

Pro, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Workers coming in contact with acetic acid for a long period can suffer from bronchitis, pharyngitis, erosion of exposed teeth, and conjunctivitis as well. To put acetic acid on the blue litmus paper, drag the dropper towards it.

(ii) solubility in water Ethanoic acid in its dilute solution form is known as vinegar in the market.

[All India Delhi 2011] (c) Acids turn blue litmus red. Keep the mouth of the test tube away from you and your classmates' face.

32. Vinegar is mainly used as a preservative in food and in the pickling of vegetables. Pro, Vedantu > It reacts with sodium bicarbonate to liberate CO2 gas. 27.

(c) Both A and B test tubes will release CO2 gas. Vinegar is typically 3-7% solution of acetic acid in water. CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Acetic acid is a monocarboxylic acid because it contains only one "COOH"group. 14. 1. He then shakes the test tube and leaves it to settle. > It turns blue litmus red. (a) I and II (b) II and III

Then a gas is evolved.

Acetic acid has vinegar like smell.

Esters have fruity smell. To pour acetic acid into sodium bicarbonate solution, drag the conical flask towards the thistle funnel. Sodium hydroxide is in the form of pellets. > The functional group — COOH group is responsible for the properties of acetic acid. (b) the ethanoic acid dissolves readily in water. (d) odourless, 9. Question 6:

(d) These are the properties of acetic acid. Question 1: This reaction is called esterification. Answer:

(c) alkyl group

In A sodium carbonate was added In B sodium bicarbonate was added In C sodium chloride was added In D sodium hydroxide was added. How can you prepare fresh lime water? (a) 10°C (b) 20°C (c) 18°C (d) 16°C, 6. State the temperature at which acetic acid freezes. 32. > Acetic acid is a monocarboxylic acid as it contains only one —COOH group. (b) Radioactive and flammable Compound ‘X’ can be Na2CO3 (Sodium carbonate) H2S04.

(c) the solution becomes light orange. Fix a cork with bent delivery tube in the mouth of above test tube. (c) acid formed a layer at the bottom The molecular formula for Acetic Acid is CH 3 COOH, with a molecular weight of 60.05.

In water, it dissolves with the evolution of heat and contraction in volume.

Compounds formed on reaction with carbonates are acetate salts, water and carbon dioxide.

(b) carboxylic group By conducting lime water test: Allow the released gas to pass through freshly prepared lime water, if it turns lime water milky then the liberated gas is CO2. The functional group in acetic acid is carboxylic group. What will happen if a few drops of dil. The beaker appears cold when touched from outside.

What happens when acetic acid is added in a solution of Na2CO3 in a test tube? Answer: The red litmus paper turns blue when dipped into the solution. 21.

(d) All are the properties and tests for CO2 gas 28. Click on the ‘Reset’ button to redo the test. (a) no reaction Give the molecular formula of acetic acid. —COOH is called carboxyl group. So, mainly the hazard depends on the concentration of the acid. Therefore, pure and anhydrous acid is usually referred to as glacial acetic acid where glacial means ice-like. In the treatment of cancer, it is directly injected into the tumour. The correct observations are:

CH₃COO⁻, acetate is the conjugate base of acetic acid. > It dissociates in water to form CH3COO and H+ ions. 9. > Acetic acid is used as coagulant in the manufacture of rubber. Four test tubes A, B, C and D contain sodium hydroxide, sodium sulphate, ethanoic acid and sodium chloride respectively. It is the main component of vinegar.

(a) carbon dioxide gas

Burning candle was brought near the mouth of each test tube. Take 2 mL of ethyl alcohol in a test tube and add 2 mL of acetic acid to it, also add 2-4 drops of cone.

(a) blue litmus red 4. 1.

> The oxidation of ethanol to ethanoic acid turns alcoholic drinks sour when exposed to air. Some important physical properties of acetic acid are listed below. Give Some Preparation Methods of Acetic Acid.

Answer: Answer: (d) Bicarbonates have carbonate ion which is released on reaction with acid.

(d) A layer of acetic acid over the layer of water. The gas produced is carbon dioxide due to the action of CH 3 COOH on NaHCO 3 , which turns lime water milky. Give the IUPAC name of acetic acid. A colourless and odourless gas evolves with a brisk effervescence. 18°C liquid Which gas is evolved when ethanoic acid reacts with sodium hydrogen carbonate? (a) the mixture remains red 33. Reaction with sodium bicarbonate: A small quantity of sodium bicarbonate solution is taken in a boiling tube. 29.

Properties of Acetic Acid. (b) Kerosene

(c) calcium bicarbonate in water



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