Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?
Solution and Explanation
Carbon dioxide is acidic in nature and potassium hydroxide is a strong base. Hence, carbon dioxide reacts with potassium hydroxide to form potassium carbonate and water as
\(2KOH+CO→K_2CO_3+H_2O\)
Thus, the mass of the U-tube containing KOH increases. This increase in the mass of U-tube gives the mass of CO2produced. From its mass, the percentage of carbon in the organic compound can be estimated.
Top Questions on Organic Chemistry - Some Basic Principles and Techniques
- Which of the following compounds has the highest boiling point?
- BITSAT - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- The compound which does not react with ammonical silver nitrate solution is:
- UPCATET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- The amine which is most basic in gas phase is:
- UPCATET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- Which of the following amines will give most easily \(\mathrm{N}_2\) gas on treatment with \(\mathrm{NaNO}_2 + \mathrm{HCl}\) at 275 K:
- UPCATET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- Electrophile used in Kolbe’s reaction is:
- UPCATET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
Questions Asked in CBSE Class XI exam
- The story revolves around characters who belong to a tribe in Armenia. Mourad and Aram are members of the Garoghlanian family. Now locate Armenia and Assyria on the atlas and prepare a write-up on the Garoghlanian tribes. You may write about people, their names, traits, geographical and economic features as suggested in the story.
- CBSE Class XI
- The summer of the beautiful white horse
- The equilibrium constant for the following reaction is 1.6 ×105 at 1024 K.
\(H_2(g) + Br_2(g) ⇋ 2HBr(g)\)
Find the equilibrium pressure of all gases if 10.0 bar of HBr is introduced into a sealed container at 1024 K.- CBSE Class XI
- Law Of Chemical Equilibrium And Equilibrium Constant
- Take one flower of the family Solanaceae and write its semi-technical description. Also draw their floral diagram.
- CBSE Class XI
- The Flower
Give reasons for the following.
(i) King Tut’s body has been subjected to repeated scrutiny.
(ii) Howard Carter’s investigation was resented.
(iii) Carter had to chisel away the solidified resins to raise the king’s remains.
(iv) Tut’s body was buried along with gilded treasures.
(v) The boy king changed his name from Tutankhaten to Tutankhamun.- CBSE Class XI
- Discovering Tut: The saga Continues
- Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand.
- CBSE Class XI
- Taxonomic Categories
Concepts Used:
Organic Chemistry – Some Basic Principles and Techniques - Reaction Mechanism
SN1 Reaction Mechanism:
SN1 reaction mechanism takes place by following three steps –
- Formation of carbocation
- Attack of nucleophile
- Deprotonation
SN2 Reaction Mechanism:
The SN2 reaction mechanism involves the nucleophilic substitution reaction of the leaving group (which generally consists of halide groups or other electron-withdrawing groups) with a nucleophile in a given organic compound.
Electrophilic Aromatic Substitution Reaction Mechanism:
The mechanism of an electrophilic aromatic substitution reaction contains three main components which are:
- A new sigma bond from C=C is formed during the reaction in the arene nucleophile.
- Due to the breaking of the C-H sigma bond, a proton is removed.
- The C=C bond is reformed and it restores the aromaticity of the compound.
Electrophilic Substitution Reaction Mechanism:
The electrophilic substitution reaction mechanism is composed of three steps, which will be discussed more below.
- Electrophile Generation
- Carbocation Formation
- Proton Removal