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प्रश्न
Choose the correct alternative and rewrite the following:
Acetic acid ..................
पर्याय
is insoluble in water
turns blue litmus red
is pale yellow in colour
none of the above
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उत्तर
Acetic acid turns blue litmus red.
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संबंधित प्रश्न
A student puts a drop of reaction mixture of a saponification reaction first a blue litmus paper and then on a red litmus paper. He may observe that:
(a) There is no change in the blue litmus paper and the red litmus paper turns white.
(b) There is no change in the red litmus paper and the blue litmus paper turns red.
(c) There is no change in the blue litmus paper and the red litmus paper turns blue.
(d) No change in colour is observed in both the litmus papers
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
What is the common name of methanoic acid?
Draw the structure for the following compound:
Ethanoic acid
Name one chemical compound which can be used to distinguish between ethanol and ethanoic acid.
How would you distinguish between ethanol and ethanoic acid by chemical test?
When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas. Y Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the one which you have named. Also write the chemical equation of the reaction involved.
A student puts a drop of acetic acid first on a blue litmus paper and then on a red litmus paper. He would observe that
(A) the red litmus paper turns colourless and there is no change in the blue litmus paper.
(B) the red litmus paper turns blue and the blue litmus paper turns red.
(C) there is no change in the red litmus paper and the blue litmus paper turns red.
(D) there is no change in the blue litmus paper and the red litmus paper turns blue.
Name the functional group present in the following compound:
HCOOH
On adding 2 mL acetic acid to 2 mL of water in a test tube, it was observed that
(A) a clear and transparent solution is formed
(B) a white precipitate is formed almost immediately
(C) two separate layers were formed
(D) a colourless and odourless gas is evolved
Under what conditions does ethane get converted to ethyl alcohol?
Write three physical properties of acetic acid.
Write a balanced equation for the following:
Write the equation for the preparation of ethylene from ethyl alcohol.
State how the following conversions can be carried out:
Ethyl chloride to Ethyl alcohol
Draw the structure formula of ethyne.
With a labelled diagram describe in brief an activity to show the formation of ester.
Explain the following reaction with an example.
Saponification
A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.
Write a chemical equation for the reaction.
A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.
Suggest a method of testing the gas liberated in the reaction.
How is ethanol to ethanoic acid an oxidation reaction different from the reaction in which ethanol burns in the presence of oxygen?
