A sample of 0.125 g of an organic compound when analysed by Duma’s method yields 22.78 mL of nitrogen gas collected over KOH solution at 280 K and 759 mm Hg. The percentage of nitrogen in the given organic compound is____.(Nearest integer) Given : 1. The vapour pressure of water of 280 K is 14.2 mm Hg. 2. R = 0.082 L atm K–1 mol–1
Solution and Explanation
\(\begin{array}{l}P_{original} = 759 – 14.2 = 744.8 ~\text{mmHg}\end{array}\)
\(\begin{array}{l}n_{N_2}=\frac{744.8\times22.78}{760\times0.0821\times280\times1000}\\ = 0.000971 ~\text{mol}\end{array}\)
\(Mass \;of N_2 = 0.02719 \;gm\)
\(\begin{array}{l}\text{Percentage of nitrogen} =\frac{0.0271}{0.125}\times100=21.75\simeq 22 \end{array}\)
Top Questions on Organic Chemistry - Some Basic Principles and Techniques
- Given below are two statements:
Statement I: Ozonolysis followed by treatment with Zn, H$_2$O of cis-2-butene gives ethanal.
Statement II: The product obtained by ozonolysis followed by treatment with Zn, H$_2$O of 3, 6-dimethyloct-4-ene has no chiral carbon atom.
In the light of the above statements, choose the correct answer from the options given below.- JEE Main - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- An isomer of C$_8$H$_{18}$ is X. This has five primary, one tertiary and one quaternary carbon. What is X?
- TS EAMCET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- What are X and Y in the following reaction sequence?
2-Methylbutane $\xrightarrow{\text{KMnO}_4}$ X$\xrightarrow{\text{Y}}$ C5H11Cl- TS EAMCET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- IUPAC names of benzene derivatives are respectively:
- TS EAMCET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
- X and Y in reaction sequence:
- TS EAMCET - 2025
- Chemistry
- Organic Chemistry - Some Basic Principles and Techniques
Questions Asked in JEE Main exam
Given below are two statements:
Statement (I):
are isomeric compounds.
Statement (II):
are functional group isomers.
In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
- Isomerism
- Let ABC be a triangle formed by the lines \( 7x - 6y + 3 = 0 \), \( x + 2y - 31 = 0 \), and \( 9x - 2y - 19 = 0 \). Let the point \( (h, k) \) be the image of the centroid of \( \triangle ABC \) in the line \( 3x + 6y - 53 = 0 \). Then \( h^2 + k^2 + hk \) is equal to:
- JEE Main - 2025
- Coordinate Geometry
- For a reaction, $$ {N}_2{O}_5(g) \rightarrow 2{NO}_2(g) + \frac{1}{2} {O}_2(g) $$ in a constant volume container, no products were present initially. The final pressure of the system when 50% of the reaction gets completed is:
- JEE Main - 2025
- Chemical Reactions
- If the image of the point $ P(1, 0, 3) $ in the line joining the points $ A(4, 7, 1) $ and $ B(3, 5, 3) $ is $ Q(\alpha, \beta, \gamma) $, then $ \alpha + \beta + \gamma $ is equal to:
- JEE Main - 2025
- 3D Geometry
Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with
\(K_4\)[Fe(CN)\(_6\)] is : \[ {Cu}^{2+}, \, {Fe}^{3+}, \, {Ba}^{2+}, \, {Ca}^{2+}, \, {NH}_4^+, \, {Mg}^{2+}, \, {Zn}^{2+} \]- JEE Main - 2025
- Qualitative Analysis
Concepts Used:
Organic Chemistry - Some Basic Principles and Techniques
Organic Chemistry is a subset of chemistry dealing with compounds of carbon. Therefore, we can say that Organic chemistry is the chemistry of carbon compounds and is 200-225 years old. Carbon forms bond with itself to form long chains of hydrocarbons, e.g.CH4, methane and CH3-CH3 ethane. Carbon has the ability to form carbon-carbon bonds quite elaborately. Polymers like polyethylene is a linear chain where hundreds of CH2 are linked together.
Read Also: Organic Compounds
Importance of Organic Chemistry:
Organic chemistry is applicable in a variety of areas including-
- Medicines: Example- Aspirin which is a headache medicine and Ibuprofen is a painkiller, both are organic compounds. Other examples include paracetamol.
- Food: Example- Starch which is a carbohydrate is an organic compound and a constituent of rice and other grains. It is the source of energy.
- Clothing: Example- Nylon, Polyester and Cotton are forms of organic compounds.
- Fuels: Examples- Gasoline, Petrol and Diesel are organic compounds used in the automobile industry at large.