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प्रश्न
Ester is a sweet-smelling compound.
पर्याय
Right
Wrong
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उत्तर
Ester is a sweet-smelling compound- Right
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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
A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations, he must note in his note book, about the reaction that takes place. Also write chemical equation foe the reaction.
When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, a substance with fruity smell is produced. Answer the following:-
(i) State the class of compounds to which the fruity smelling compounds belong. Write the chemical equation for the reaction and write the chemical name of the product formed.
(ii) State the role of conc. H2SO4 in the reaction.
A student adds a few drops of ethanoic acid to test tubes X, Y and Z containing aqueous solutions of sodium chloride, sodium hydroxide and sodium carbonate, respectively. If he now brings a burning splinter near the mouth of the test tubes immediately after adding ethanoic acid in each one of them, in which of the test tube or test tubes the flame will be extinguished?
(A) X and Y
(B) Y and Z
(C) X and Z
(D) only Z
Draw the structure for the following compound:
Propanoic acid
Give the name and structural formula of one homologue of HCOOH.
Which of the following will give brisk effervescence with sodium hydrogen carbonate and why?
CH3COOH, CH3CH2OH
What happens when propanoic acid is warmed with methanol in the presence of a few drops of concentrated sulphuric acid? 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.
Consider the following organic compounds:
HCHO, C2H5OH, C2H6, CH3COOH, C2H5Cl
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.
Write the names of the first three members of the carboxylic acid series.
Name the compound formed when acetic acid and ethanol react together.
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
Which one of the following are the correct observations about acetic acid?
(A) It turns blue litmus red and smells like vinegar
(B) It turns blue litmus red and smells like burning sulphur
(C) It turns res litmus blue and smells like vinegar
(D) It turns red litmus blue and has a fruity smell
When acetaldehyde is oxidized with acidified potassium dichromate, it forms ______.
Draw the structure formula of ethyne.
Ethanoic acid _________.
Draw the structural diagram of:
Ethanoic acid
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
