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Questions
What is an oxidising agent?
Explain the term Oxidising agent with example.
Solution 1
An oxidising agent is a reactant which readily transfers oxygen atoms to another substance by reducing itself in the process.
Solution 2
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.
RELATED QUESTIONS
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
Fill in the blanks from the choices given within brackets:
The basicity of acetic acid is-------- (3, 1, 4).
Write the formulae of ethanoic acid.
What type of compound is formed when a carboxylic acid reacts with an alcohol in the presence of conc. H2SO4?
An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula C2H4O2. On warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed.
(a) Identify X and Y. Also write their formulae showing the functional group present in them.
(b) Write a chemical equation for the reaction involved.
Write the names of three compounds which can be oxidised directly or in stages to produce acetic acid.
What do you notice when acetic acid reacts with alkalies?
Acetic acid is a typical acid. Write one equation in case of its reactions with a base/alkali?
Acetic acid is a typical acid. Write one equation in case of its reactions with a bicarbonate.
What do you observe when acetic acid is added to sodium bicarbonate?
A student is studying the properties of acetic acid. List two physical properties of acetic acid he observes. What happens when he adds a pinch of sodium hydrogen carbonate to this acid? Write any two observations.
A student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it. He observes:
(A) no reaction in the test tube
(B) colourless gas with pungent smell
(C) bubbles of a colourless and odourless gas
(D) white fumes with smell of vinegar
A student adds 4 mL of acetic acid to a test tube containing 4 mL of distilled water. He then shakes the test tube and leaves it to settle. After about 10 minutes he observes:
(A) a layer of water over the layer of acetic acid
(B) a layer of acetic acid over the layer of water
(C) a precipitate settling at the bottom of the test tube
(D) a clear colourless solution
Name the following:
A toxic alcohol
What is vinegar and glacial acetic acid?
What is the action of acetic acid with litmus paper?
Define glacial acetic acid?
How Will You Carry Out the Following Conversions?
Ehane to acitic acid
Fill in the blank with appropriate word/words.
Vinegar is a solution of about ________per cent ________in water.
Write the chemical equation for the following:
Combustion of methane
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
State the observation
When the gaseous product obtained by dehydration of ethyl alcohol is passed through bromine water.
Draw the structural formula for the following:
Ethanoic acid
Ethanoic acid _________.
Explain the following reaction with an example.
Esterification
Write the answers to the questions by observing the following figure.
- Write the chemical reaction shown in the figure above in the form of a balanced equation.
- Write the name of the gas coming out of the large test tube in the above chemical reaction.
- Why do small bubbles appear in the small test tube?
- What is the change in colour of lime water?
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
Why is glacial acetic acid called so?
Give the balanced chemical equation of the reaction.
Oxidation of ethanol by acidified potassium dichromate.
