Species having carbon with sextet of valence electron and acts as an electrophile is:
- Carbanion
- Carbocation
- Free Radical
- Nitrene
The Correct Option is B
Solution and Explanation
Top Questions on Allotropes of carbon
Consider the following compound (X):
The most stable and least stable carbon radicals, respectively, produced by homolytic cleavage of corresponding C - H bond are:- JEE Main - 2025
- Chemistry
- Allotropes of carbon
- In solid state, nitrogen exists in two different allotropic forms ($\alpha$ and $\beta$). Give an idea regarding their shapes and stability.
- Tripura JEE - 2024
- Chemistry
- Allotropes of carbon
- Which of the following compound(s) is/are chiral?
- JKCET - 2024
- Chemistry
- Allotropes of carbon
- If a compound has 3 chiral carbons, what is the number of optically active isomers?
- JKCET - 2024
- Chemistry
- Allotropes of carbon
- The most stable carbanion among the following is:
- JKCET - 2024
- Chemistry
- Allotropes of carbon
Questions Asked in JEE Main exam
- If the system of equations \[ (\lambda - 1)x + (\lambda - 4)y + \lambda z = 5 \] \[ \lambda x + (\lambda - 1)y + (\lambda - 4)z = 7 \] \[ (\lambda + 1)x + (\lambda + 2)y - (\lambda + 2)z = 9 \] has infinitely many solutions, then \( \lambda^2 + \lambda \) is equal to:
- JEE Main - 2025
- Matrices and Determinants
A bob of mass \(m\) is suspended at a point \(O\) by a light string of length \(l\) and left to perform vertical motion (circular) as shown in the figure. Initially, by applying horizontal velocity \(v_0\) at the point ‘A’, the string becomes slack when the bob reaches at the point ‘D’. The ratio of the kinetic energy of the bob at the points B and C is:
- JEE Main - 2025
- Kinetic Energy
- The number of different 5 digit numbers greater than 50000 that can be formed using the digits 0, 1, 2, 3, 4, 5, 6, 7, such that the sum of their first and last digits should not be more than 8, is:
- JEE Main - 2025
- permutations and combinations
- A bar magnet has total length \( 2l = 20 \) units and the field point \( P \) is at a distance \( d = 10 \) units from the centre of the magnet. If the relative uncertainty of length measurement is 1%, then the uncertainty of the magnetic field at point P is:
- JEE Main - 2025
- Magnetic Field
- A force of 49 N acts tangentially at the highest point of a sphere (solid of mass 20 kg) kept on a rough horizontal plane. If the sphere rolls without slipping, then the acceleration of the center of the sphere is:
- JEE Main - 2025
- Quantum Mechanics
Concepts Used:
Allotropes of Carbon
The existence of a chemical element in one or more physical forms happening in the same physical state is called Allotropes or allotropy. Allotropes may show different physical or chemical states turning on the atom arrangement or the number of existent atoms. While carbon and sulfur is the common element presenting allotropy. Carbon can make further allotropes due to its five-membered valency.
Read More: Allotropes of Carbon
Allotropes of Carbon:
Carbon is part of a p-block element.
- The atomic number of carbon = 6
- It belongs to group 14.
- It makes up about 18.5% of the human body by mass.
Carbon has only two types of allotropes, such as;
- Crystalline
- Amorphous
The crystalline form of carbon consists of allotropes like;
- Diamond
- Graphite
- Fullerenes
The amorphous form of carbon consists of allotropes like;
- Coal
- Coke
- Wood charcoal
- Animal charcoal
- Lampblack
- Gas carbon