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प्रश्न
How would you distinguish between ethanol and ethanoic acid by chemical test?
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उत्तर
Ethanoic acid releases carbon dioxide gas on reacting with sodium bicarbonate. It is represented by the following equation:
`CH_3 COOH + NaHCO_3 -> CH_3 COONa + CO_2 + H _2 O`
On the other hand, ethanol does not give out a brisk effervescence (carbon dioxide) with sodium bicarbonate.
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संबंधित प्रश्न
What are esters ?
List two uses of esters.
Write the name and chemical formula of the simplest organic acid.
Choose those compounds from the following which can turn blue litmus solution red:
HCHO, CH3COOH, CH3OH, C2H5OH, HCOOH, CH3CHO
Give reasons for your choice.
Describe one reaction of a carboxylic acid.
What happens when ethanoic acid reacts with sodium hydroxide? Write equation of the reaction involved.
Give any two uses of ethanoic acid.
The structural formula of an ester is :
Write the formula of the acid and the alcohol from which it is formed.
What do you notice when acetic acid reacts with alkalies?
What do you notice when acetic acid reacts with alcohol?
In an experiment to study the properties of acetic acid a student takes about 2 mL of acetic acid in a dry test tube. He adds about 2 mL of water to it and shakes the test tube well. He is likely to observe that:
(A) the acetic acid dissolves readily in water
(B) the solution becomes light orange
(C) water floats over the surface of acetic acid
(D) acetic acid floats over the surface of water
Fill in the blank with appropriate word/words.
Esterification is the reaction between carboxylic acid and ______ in presence of ____
Write a balanced equation for the following:
Write the equation for the preparation of ethylene from ethyl alcohol.
What type of compound is formed by the reaction between acetic acid and an alcohol?
Write a fully balanced equation for the folowing case:
Acitic acid is warmed with ethanol in the presence of concentrated sulpheric acid.
When sodium hydrogen carbonate is added to ethanoic acid, a gas evolves. Consider the following statements about the gas evolved.
- It turns lime water milky.
- It is evolved with brisk effervescence.
- It has a smell of burning sulfur.
- It is also a by-product of respiration.
The reaction between acetic acid and sodium carbonate is shown in the following figure.
Answer the questions with the help of a diagram.
- Which gas does come out as effervescence in the big test tube?
- What is the colour change in the lime water present in the small test tube?
- Write the related reaction.
Raina while doing certain reactions observed that heating of substance ‘X’ with a vinegar-like smell with a substance ‘Y’ (which is used as an industrial solvent.) in the presence of conc. Sulphuric acid in a water bath gives a sweet-smelling liquid ‘Z’ having molecular formula C4H8O2. When heated with caustic soda (NaOH), ‘Z’ gives back the sodium salt and the compound ‘Y’.
Identify ‘X’, ‘Y’, and ‘Z’. Illustrate the changes with the help of suitable chemical equations.
Give the balanced chemical equation of the following reaction:
Combustion of ethanol.
