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प्रश्न
Explain the following term with example.
Monomer
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उत्तर
Monomer: A monomer is a molecule that forms the basic unit for polymers. They may be considered as building blocks from which proteins are made. Monomers may bind to other monomer unit to form a repeating chain molecule. Monomers may be either natural or synthetic in origin.
For example: Ethylene, vinyl chloride, styrene etc.
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संबंधित प्रश्न
A student puts a drop of reaction mixture of a saponification reaction first a blue litmus paper and then on a red litmus paper. He may observe that:
(a) There is no change in the blue litmus paper and the red litmus paper turns white.
(b) There is no change in the red litmus paper and the blue litmus paper turns red.
(c) There is no change in the blue litmus paper and the red litmus paper turns blue.
(d) No change in colour is observed in both the litmus papers
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
A gas is liberated immediately with a brisk effervescence, when you add acetic acid to sodium hydrogen carbonate powder in a test tube. Name the gas and describe the test that confirms the identity of the gas.
Write the IUPAC names, common names and formulae of the first two members of the homologous series of carboxylic acids.
Give the common name and IUPAC name of the following compound:
HCOOH
Give the common name and IUPAC name of C2H5OH.
Consider the following organic compound:
CH3OH, C2H5OH, CH3COCH3, CH3COOH, C2H5COOH, C4H9COOC2H5, CH4, C2H6, CH3CHO, HCHO
Out of these compound:
Which compound is a constituent of vinegar?(e) Which compound is a constituent of vinegar?
Write the IUPAC name of the following:
\[\begin{array}{cc}
\ce{CH3}\\
|\\
\ce{CH3 -C -CH3}\\
|\\
\ce{CH3}
\end{array}\]
Name the substance used to change acetic acid to acetic anhydride?
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
How is ethyne prepared in the laboratory?
Write balanced euation for the following :
Ethane is burnt in air.
State how the following conversions can be carried out:
Ethyl alcohol to Ethane
State the observation
When the gaseous product obtained by dehydration of ethyl alcohol is passed through bromine water.
Ethanoic acid _________.
CH3–CH2–CHO : propanal : : CH3–COOH : _______
Give a chemical reaction in which a catalyst is used.
Ethanoic acid turns ______ litmus to ______
When ethanoic acid is treated with NaHCO^ the gas evolved is ______.
