Advertisements
Advertisements
प्रश्न
Describe a test for carboxylic acid.
Advertisements
उत्तर
Carboxylic acids react with sodium bicarbonate to form Sodium ethanoate and water along with carbon dioxide, which produces effervescence in the reaction mixture. This reaction is used as a test for the presence of carboxylic acids.
`CH_3 COOH + NaHCO_3 -> CH_3 COONa + CO_2 + H_2O`
APPEARS IN
संबंधित प्रश्न
For preparing soap in the laboratory we require an oil and a base. Which of the following combinations of an oil and a base would be best suited for the preparation of soap?
(a) Castor oil and calcium hydroxide
(b) Turpentine oil and sodium hydroxide
(c) Castor oil and sodium hydroxide
(d) Mustard oil and calcium hydroxide
Identify the term or substance based on the descriptions given below
Ice like crystals formed on cooling an organic acid sufficiently.
Fill in the following blank with suitable word:
The next higher homologue of ethanol is ...............
What will you observe when dilute ethanoic acid and dilute hydrochloric acid are put on universal indicator paper, one by one? What does it show?
State any two uses of esters.
Consider the following organic compounds:
HCHO, C2H5OH, C2H6, CH3COOH, C2H5CI
Choose two compounds which can react in the presence of conc. H2SO4 to form an ester. Give the name and formula of the ester formed.
The structural formula of an ester is :

Write the formula of the acid and the alcohol from which it is formed.
Write the names of three compounds which can be oxidised directly or in stages to produce acetic acid.
How is acetic acid prepared from acetylene?
A student is studying the properties of acetic acid in his school laboratory. List two physical and two chemical properties which he must observe and note in his record book.
Acetic acid smells like:
(1) a banana
(2) vinegar
(3) an orange
(4) a lemon
Define glacial acetic acid?
Write balanced euation for the following :
Ethane is burnt in air.
Write a balanced equation for the following:
Write the equation for the preparation of ethylene from ethyl alcohol.
Identify the term or substance based on the descriptions given below:
Hydrocarbon containing a triple bond used for welding purposes
Distinguish between esterification and saponification reactions with the help of chemical equations for each.
Ethanoic acid turns ______ litmus to ______
Ethanoic acid reacts with the basic salt, sodium carbonate, to form a salt, named ______, water and carbon dioxide gas.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
Give the balanced chemical equation of the following reaction:
Oxidation of ethanol by acidified potassium dichromate.
