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प्रश्न
What is an oxidising agent?
Explain the term Oxidising agent with example.
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उत्तर १
An oxidising agent is a reactant which readily transfers oxygen atoms to another substance by reducing itself in the process.
उत्तर २
The substances which can give oxygen to other substances are called oxidant or oxidizing agents.
E.g. Potassium permanganate (KMnO4) and potassium dichromate (K2Cr2O7) in acidic or alkaline medium is commonly used oxidants.
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
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
Complete the following chemical equations:
C2H5OH+CH3COOH`("conc."H_2SO_4)/`>
Complete the following chemical equations : C2H5OH`("Conc."H_2SO_4)/(443K)`>
Draw the structure for the following compound.
Ethanoic acid
Write the formulae of methanoic acid.
Write the formulae of ethanoic acid.
Draw the structure of butanoic acid.
How would you distinguish experimentally between an alcohol and carboxylic acid on the basis of a chemical property?
What happens when ethanoic acid reacts with sodium hydroxide? Write equation of the reaction involved.
An organic compound X of molecular formula C2H4O2 gives brisk effervescence with sodium hydrogen carbonate. Give the name and formula of X.
Give any two uses of ethanoic acid.
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 IUPAC name of the following:
\[\begin{array}{cc}
\ce{CH3}\\
|\\
\ce{CH3 -C -CH3}\\
|\\
\ce{CH3}
\end{array}\]
Name the product formed and give the appropriate chemical equation for the following:
Sodium reacting with ethyl alcohol.
What do you notice when acetic acid reacts with alcohol?
Name the compound formed when acetic acid and ethanol react together.
What do you observe when acetic acid is added to sodium bicarbonate?
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.
Name the following:
A toxic alcohol
What is vinegar and glacial acetic acid?
What is thr boilng point of acetic acid?
Fill in the blank with appropriate word/words.
Vinegar is a solution of about ________per cent ________in water.
Why is pure acetic acid also known as glacial acetic acid?
State how the following conversions can be carried out:
Ethene to Ethyl alcohol.
Write a balanced chemical equation for the following:
Monochloroethane is hydrolysed with aqueous KOH.
Give reason for the following :
Ethyne is more reactive than ethane
Draw the structure formula of ethyne.
Assertion (A): Esterification is a process in which a sweet-smelling substance is produced.
Reason (R): When esters react with sodium hydroxide an alcohol and sodium salt of carboxylic acid are obtained.
Write the molecular formula of the given compound.
Sodium ethanoate
Explain the following reaction with an example.
Saponification
Ester is formed by the reaction between ______.
Which of the following represents saponification reaction?
Anita added a drop each of diluted acetic acid and diluted hydrochloric acid on pH paper and compared the colors. Which of the following is the correct conclusion?
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:
Neutralization of NaOH with ethanoic acid.
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.
