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प्रश्न
Choose the correct alternative and rewrite the following:
Acetic acid ..................
विकल्प
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
Consider the following comments about saponification reactions:
I. Heat is evolved in these reactions.
II. For quick precipitation of soap, sodium chloride is added to the reaction mixtures.
III. Saponification reactions are a special kind of neutralisation reactions.
IV. Soaps are basic salts of long-chain fatty acids.
The correct comments are
(a) I, II and III
(b) II, III and IV
(c) I, II and IV
(d) Only I and IV
Identify the term or substance based on the descriptions given below
Ice like crystals formed on cooling an organic acid sufficiently.
Write the formula of ethanoic acid.
Name the gas evolved when ethanoic acid is added to sodium carbonate. How would you prove the presence of this gas?
What type of compound is formed when a carboxylic acid reacts with an alcohol in the presence of conc. H2SO4?
What happens when ethanoic acid reacts with sodium carbonate? Write chemical equation of the reaction involved.
How does ethanoic acid react with sodium hydrogen carbonate? Give equation of the reaction which takes place.
Name the compound formed when acetic acid and ethanol react together.
A student takes 2 mL acetic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He makes the following observations:
I. A colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when passed through it.
III. The gas burns with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are:
(A) I, II, and III
(B) II, III and IV
(C) III, IV and I
(D) IV, I and II
Write the molecular formulae and structure formula of ethanic acid?
Fill in the blank with appropriate word/words.
Vinegar is a solution of about ________per cent ________in water.
Identify the term or substance based on the descriptions given below:
Ice like crystals formed on cooling an organic acid sufficiently.
A compound X when treated with an organic acid Y (having vinegar-like smell) in the presence of the acid Z, forms a compound P which has a fruity smell.
- Identify X, Y and Z
- Write the structural formula of X and Y.
- What type of compound is P?
- Name the above reaction.
- If compounds X and Y both have 2 carbon atoms. Write the reaction.
Convert ethane to acetic acid.
Explain the following reaction with an example.
Esterification
Mineral acids are stronger acids than carboxylic acids because
- mineral acids are completely ionised
- carboxylic acids are completely ionised
- mineral acids are partially ionised
- carboxylic acids are partially ionised
Bubbles are seen in the test tube during the preparation of lime water.
How is ethanol to ethanoic acid an oxidation reaction different from the reaction in which ethanol burns in the presence of oxygen?
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
