The substances whose conductivity lies between 10-⁶ to 10⁴ ohm-¹ . The range lies between conductors and insulators. Types 1. n-type :- These type of semiconductors have excess electrons present in the lattice that are responsible for the conduction. These are formed when the group 14 elements like Silicon are doped with group 15 elementsContinue reading “Semiconductor and its types.”
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What is aldol Condensation ?
Ald + ol Ald- Aldehyde ; ol – Alcohol. As the name suggests , this is a type of reaction which involve the formation of such a molecule which have “alcohol and aldehyde” functional groups.
Why does phosphorus form P4 exists but P2 do not exists?
The P2 molecule of phosphorus is not found because of the larger size of the phosphorus atom. The phosphorus is so larger that the p-orbitals which are required to overlapp sideways , are unable to overlapp sufficiently to make a pie bond. Below is the structure of oxygen atom that is showing π-bond But phosphorusContinue reading “Why does phosphorus form P4 exists but P2 do not exists?”
What is a chemical bond ?
Chemical bond may be defined as the force of attraction by which two atoms are held together. The chemical bonds lead to the formation of molecules and crystals. There are various kind of bonding that we see around us. Covalent bond A covalent bond is formed by mutual sharing of electrons between two atoms. ForContinue reading “What is a chemical bond ?”
Terms related to mass
Atomic mass Atomic mass of an element is the relative mass as compared with an atom of carbon 12 and it is expressed in AMU. A.M.U. AMU is the Atomic mass unit and it is defined as the mass equal to 1 by 12th of the mass of carbon 12 isotope. 1 amu = 1.66056xContinue reading “Terms related to mass”
How to revise Digestive system in an easy way?
Human digestive system includes two basic things Alimentary canal 2. Digestive glands 1 Alimentary canal : human alimentary canal is basically a pipe of varying diameter which is designed for the maximum absorption of food. human alimentary canal is complete that is it two different openings for the ingestion of food and excretion of wasteContinue reading “How to revise Digestive system in an easy way?”
Why Alkynes are less reactive than alkenes and alkanes towards electrophilic addition reaction ?
There are two reasons for less reactivity of Alkynes towards electrophillic addition reactions:- Due to greater electronegativity of sp-hybridized carbon atoms of a triple bond than sp2 -hybridized carbon atoms of a double bond, pie-electrons of alkynes are more tightly held by the carbon atoms than pie electrons of alkenes and hence are less easilyContinue reading “Why Alkynes are less reactive than alkenes and alkanes towards electrophilic addition reaction ?”
The Unconditional Guru 