Advertisements
Advertisements
प्रश्न
CH3–CH2–CHO : propanal : : CH3–COOH : _______
Advertisements
उत्तर
CH3–CH2–CHO : propanal : : CH3–COOH : ethanoic acid
APPEARS IN
संबंधित प्रश्न
The molecular formula of acetic acid is _________ .
(a) CH3COOH
(b) CH3 – CH3
(c) C6H6
(d) C2H4
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
In order to study saponification reaction, we first prepare 20% solution of sodium hydroxide. If we record the temperature of this solution just after adding sodium hydroxide flakes to water and also test its nature using litmus, it may be concluded that the process of making this solution is
(A) exothermic and the solution is alkaline
(B) endothermic and the solution is alkaline
(C) endothermic and the solution is acidic
(D) exothermic and the solution is acidic
What are esters ?
Write the name and chemical formula of the simplest organic acid.
Give the common name and IUPAC name of C2H5OH.
Which of the following molecular formula corresponds to ethylbutanoate ester?
(a) C5H10O2
(b) C6H12O2
(c) C7H14O2
(d) C8H16O2
An organic compound A (molecular formula C2H4O2) reacts with Na metal to form a compound B and evolves a gas which burns with a pop sound. Compound A on treatment with an alcohol C in the presence of a little of concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula C3H6O2). Compound D on treatment with NaOH solution gives back B and C. Identify A, B, C and
The next higher homologue of ethanoic acid is ______.
Acetic acid is a typical acid. Write one equation in case of its reactions with a carbonate.
Why is Soda lime used not only NaOH?
Fill in the blank with appropriate word/words.
Denatured alcohol is a mixture of _____ and _______
What type of compound is formed by the reaction between acetic acid and an alcohol?
State how the following conversions can be carried out:
Ethyl chloride to Ethyl alcohol
Draw the structural formula for the following:
Ethanoic acid
Ethanoic acid _________.
Ethanoic acid turns ______ litmus to ______
When ethanoic acid is treated with NaHCO^ the gas evolved is ______.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
