Chapter 11 – Some p-Block Elements

Class XI - Chemistry
Unit 11 - P-Block Elements
Chemical Properties of Group-13 Elements
Oxidation States (Inert Pair Effect)
Nature of Compounds (Electron Defficient, Covalent, Lewis Acids)
Reaction with Air (Foundatin of Oxides and Basic Strength of Oxides, Hydroxides)
Reactions towards Acid and Base)
Reactivity towards Halogen (Lewis Acidic Character of Boron Trihalides)

This video is about Chemical properties of group-13 elements, like oxidation state (inert pair effect and its causes), nature of compounds (electron defficient covalent compounds, Lewis acids, dimerization), reactivity towards air ( formation of oxides and nitrides, boron nitride the inorganic graphite), basic strength of oxides and hydroxides, reactivity towards acids and bases (amphoteric behaviour of Al), formation of halides ( Lewis acid character of Boron halides,pπ-pπ bonding and relative acidic strength of these halides).


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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Dr. D. R. Vij
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(Mob) +919416220316

Class XI - Chemistry
Unit 11 - P-Block Elements
Compounds of Boron Part-1

Anomalous Behaviour of Boron
Boric Acid or Orthoboric Acid (Preparation, Properties, Uses and Structure)

This video explains the anomalous behaviour of Boron and compound of Boron - boric acid or orthoboric acid . Its preparation (from borax and colemanite), properties (acidic nature, effect of heat etc) ,uses and structure (Hydrogen bonded planar structure).

This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - P-Block Elements
Compounds of Boron Part-2
Borax - Preparation, Properties (Borax Bead Test) and Uses
Boron Hydrides (Borames)

This video is about one more compound of Boron - Borax. Its preparation (from tincal, colemanite and boric acid), properties (Alkaline nature of aqueous solution and borax bead test) and uses.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - P-Block Elements
Compounds of Boron Part-3
Diborane - Preparation (Industrial Preparation), Properties (Combustibility, Hydrolysis, Reaction with Ammonia to Form Borazide or Inorganic Benzene, Formation of Complex Borohydrides, Reaction with Alkalis and Halogens) and Uses
Structure diborane (Banana Bonds)

This video is about another compound- borane , it's preparation (laboratory and industrial preparation), properties (hydrolysis, combustibility, formation of inorganic benzene or borazide, formation of borohydrides), uses and structure of diborane having banana bonds.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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Dr. D. R. Vij
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(Mob) +919416220316

Class XI - Chemistry
Unit 11 - P-Block Elements
Group-14 (C-Family)

General Characteristics - Atomic Radii, Ionisation Enthalpy, Electronegativity, Melting and Boiling Points, Oxidation State, Nature of Compounds, Oxidising and Reducing Character, Structure of Trimethylamins and Trisilylamine, Maximum Covalency and Complex Formation

This video is about general characteristics of group-14 elements (carbon family) like - atomic size , Ionisation energy, electronegativity, metallic character, melting and boiling point, oxidation state (inert pair effect), nature of compounds (electron precise , covalent compounds), oxidising and reducing character, tendency to form pπ -pπ bonds and formation of pπ-dπ bonds(pyramidal structure of trimethylamine and planar structure of trisilylamine).

This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - P-Block Elements
Group 14 - Chemical Properties
Reactivity towards Oxygen (Acidic and Basic Character of Oxides, Oxidising and Reducing Power)
Reactivity towards Water
Reactivity towards Halogen (Tetrahalides - Mostly Covalent, Thermal Stability, Hydrolysis)

This video explains the chemical properties of group 14 elements like reactivity towards oxygen (formation of mono- and dioxide, comparison of their acidic and basic character, oxidising and reducing character), reactivity towards water, towards halogen (formation of di- and tetrahalides, stability, ease of hydrolysis and Lewis acidic character).


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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Dr. D. R. Vij
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(Mob) +919416220316

Class XI - Chemistry
Unit 11 - P-Block Elements
Group 14 - Allotropes of Carbon

Anomalous Behaviour of Carbon (Catenation, Allotropy)
Crystalline Allotropes of Carbon (Diamond, Graphite, Fullerenes and Carbon-nanotubes)
Amorphous Allotropes of Carbon (Coke, Charcoal, Carbon Black)

This video explains the anomalous behaviour of carbon and allotropic forms of carbon. Crystalline allotropes (diamond, graphite, fullerene and carbon nanotubes). The amorphous allotropes of carbon are coke, charcoal and carbon black.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 14 - Compounds of Carbon
Carbon Monoxide (Preparation, Structure, Properties like Poisonous Nature and Reducing Character, Formation of Metal Carbonyles and Phosgene, Uses)
Carbon Dioxide (Preparation, Structure, Properties and Uses)

This video is about some compounds of carbon i.e. Carbon monoxide and carbon dioxide. Laboratory preparation of carbon monoxide from formic acid and commercial preparation from syn gas and producer gas. It is a neutral and poisonous gas used for formation of metal carbonyls and phosgene gas having 2 resonating structure.Another compound carbon dioxide is prepared by burning carbon and carbon containing compounds. It is acidic, water soluble non- combustible gas having linear structure.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 14 - Compounds of Silicon Part-1
Silicon Tetrachloride (Preparation, Properties and Uses)
Silicon or Silicon Dioxide (Occurence, Properties and Uses)
Amorphous Form of Silicon (Silica Gel and Kieselguhr)

This video is about compounds of silicon like silica . The crystalline silica has network structure having high melting point. This form is soluble in HF. The amorphous silica is silica gel and Kieselguhr . Silica gel is used in chromatography and as catalyst in petroleum industry.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 14 - Compounds of Silicon Part-2
Silicones (Preparation, Properties and Uses)
Silicates (Types of Silicates - Orthosilicates, Pyrosilicates, Cyclic or Pirysilicates, Chain Silicates, Sheet Silicates, 3-dimensional Silicates)
Zeolites - Types of 3-dimensional Silicates or Permutils

This video is about some more compounds of silicon - Silicones (preparation from methyl substituted chlorosilanes, properties and uses like solid lubricant and surgical and cosmetic implants)


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XII - Chemistry
Unit 7 - P-Block Elements
Group 15 Elements
Atomic Properties of Group 15 Elements
Electronic Configuration of Group 15 Elements
Atomic Properties such as Atomic and Ionic Radii, Ionic Enthalpy, Electronegativity of Group 15 Elements have been discussed.

This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XII - Chemistry
Unit 7 - P-Block Elements
Group 15 Elements
Physical and Chemical properties of Group 15 Elements such as: Metallic character, Melting and Boiling point, Allotropy, Oxidation state and Covalency are discussed in this video.

This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XII - Chemistry
Unit 7 - P-Block Elements
Hydrides of Group 15 Elements
Most Common Compounds of Group-15 Elements, known as Hydrides, have been discussed in this lecture.

Their preparation methods, and some properties like their structure, Binding Energy, Bond Angle, Thermal Stability, Basic Characters, Reducing Character, Boiling Point and melting Point, etc. have also been described in this video lecture.

This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XII - Chemistry
Unit 7 - P-Block Elements
Halides of Group-15 Elements
Some compounds of Group-15 with Halogens have been discussed.
Types of Halides in Group-15 form along with some questions have also been discussed.

This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 - Chemical Properties
Reactivity towards Oxygen (Formation of Tri- and Penta- Oxides, Comparison of Acidic Strength)
Reactivity towards Halogens (Tri- and Penta- Chlorides - Preparation, Properties, Structure and Uses)
Anomalous Behaviour of Nitrogen

This video explains the chemical properties of group 15 elements - reactivity towards oxygen (formation of tri- and pentaoxides and comparison of their acidic character), reactivity towards halogens (preparation, properties, uses and structure of tri- and pentahalides) and anomalous behaviour of Nitrogen (catenation, maximum covalency, tendency to form pπ-pπ bonds etc).


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Nitrogen
Commercial and Laboratory Preparation of Nitrogen
Properties such as that of Inert Gas and neutrality towards Litmus
Uses like manufacture of various compounds, filling of Electric Bulbs etc.

This video is about the first element of group 15 - Nitrogen its preparation (commercial preparation by fractional distillation of air and lab preparation), properties and uses ( in manufacture of nitrogenous fertilizer)


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Nitrogen Part-1
Commercial Preparation of NH3 (Ammonia) by Haber's Method
Properties (Basic Nature, Lewis base, as Ligand, Oxidation Reaction with Halogens, with Nessler's Reagent, etc.)
Uses and test of Ammonia

This video is about ammonia (preparation by Haber's process and other methods), properties (Lewis basic character, as ligand, reaction with halogen, carbon dioxide, metals and Nessler's reagent etc) and it's uses.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Nitrogen Part-2
Oxides of Nitrogen - Preparation, Properties, Structure (Resonating Structures of Different Oxides of Nitrogen

This video is about preparation properties and structures of oxides of nitrogen including their resonating structures as nitrogen forms number of oxides due to its small size and strong tendency to form pπ-pπ bonds with oxygen.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Nitrogen Part-3
Nitric Acid (Preparation (Commercial Preparation by Ostwald's Method), Structure, Properties (Decomposition, Acidic Nature and Oxidising Properties)
Oxidation of Non-Metals, Oxidation of Compounds

This lecture is about nitric acid - its preparation (commercial preparation by Ostwald's process), structure (planar structure showing resonance) and properties (àcidic character, oxidising behaviour like oxidation of non metals and compounds).


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

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With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Nitrogen Part-4
Some more Chemical Properties of Nitric Acjd - Reaction with Metals, Reaction with Organic Compounds
Uses of Nitric Acid for manufacture of Compounds, like Explosive TNT and Sorbitrat for treating Angina Pain

This video explains some more chemical properties of nitric acid -reactivity towards metals .It reacts with metals in different ways depending upon the nature of metal, concentration of acid and temperature. Metals like Au and Pt react with aqua regia. Nitric acid nitrates organic compounds also like glycerol to trinitro glycerol used as explosive. It is also used for manufacture of nitrogenous fertilizers, explosive like TNT and medicine sorbitrat (nitroglycerine) for treatment of angina pain.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

Viewers are requested to click LIKE button if they like a video and SUBSCRIBE to this channel to get notifications of more video lessons being uploaded from time to time in future. They are also requested to SHARE videos with nears and dears who can be benefitted.

All video lessons are systematically indexed on the website: www.gianmandir.com wherein one can register free of cost. All videos are also available through our “Gianmandir” APP which can be downloaded from Google Play Store.

With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Phosphorous
Allotropes of Phosphorous (White or Yellow, Red and Black)
Preparation, Properties and Structure of White or Yellow, Red and Black Phosphorous
Chemiluminescence or Phosphorescence

This video is about another element of nitrogen family- phosphorus. It exists in various allotropic forms out of which the most common are white (yellow), red and black phosphorus.These forms have different preparation methods, properties and structures. Phosphorus being most reactive allotrope shows chemiluminescence and stored under water.

This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

Viewers are requested to click LIKE button if they like a video and SUBSCRIBE to this channel to get notifications of more video lessons being uploaded from time to time in future. They are also requested to SHARE videos with nears and dears who can be benefitted.

All video lessons are systematically indexed on the website: www.gianmandir.com wherein one can register free of cost. All videos are also available through our “Gianmandir” APP which can be downloaded from Google Play Store.

With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Phosphorous Part-1
Phosphene (PH3) - Preparation, Properties (Formation of Vortea or Philosopher's Ring)
Structure and Uses (Holme's Signals and making smoke Screens)

This video is about preparation, properties and structure of phosphine a compound of phosphorus used in Holme's signal and in making smoke screens during wars.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

Viewers are requested to click LIKE button if they like a video and SUBSCRIBE to this channel to get notifications of more video lessons being uploaded from time to time in future. They are also requested to SHARE videos with nears and dears who can be benefitted.

All video lessons are systematically indexed on the website: www.gianmandir.com wherein one can register free of cost. All videos are also available through our “Gianmandir” APP which can be downloaded from Google Play Store.

With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Phosphorous Part-2
Halides of Phosphorous (Trihalides and Pentahalides) - Preparation, Properties, Structure and Uses
Existence of Phosphorous Pentachloride as Ionic Solid

This video explains the preparation, properties , structures and uses of halides of phosphorus with special reference to phosphorus trichloride and phosphorus pentachloride.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

Viewers are requested to click LIKE button if they like a video and SUBSCRIBE to this channel to get notifications of more video lessons being uploaded from time to time in future. They are also requested to SHARE videos with nears and dears who can be benefitted.

All video lessons are systematically indexed on the website: www.gianmandir.com wherein one can register free of cost. All videos are also available through our “Gianmandir” APP which can be downloaded from Google Play Store.

With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Phosphorous Part-3
Oxides of Phosphorous - (Trioxides and Pentaoxides) - Preparation, Properties, Structure and Uses (As Dehydrating Agent)

This video explains the preparation, properties, structures and uses of phosphorus trioxide ans phosphorus pentaoxide.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

Viewers are requested to click LIKE button if they like a video and SUBSCRIBE to this channel to get notifications of more video lessons being uploaded from time to time in future. They are also requested to SHARE videos with nears and dears who can be benefitted.

All video lessons are systematically indexed on the website: www.gianmandir.com wherein one can register free of cost. All videos are also available through our “Gianmandir” APP which can be downloaded from Google Play Store.

With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316

Class XI - Chemistry
Unit 11 - p-Block Elements
Group 15 Elements - Compounds of Phosphorous Part-4
Oxoacids of Phosphorous
Important Characteristics, Structure and Basicity

This video is about oxoacids of phosphorus. Phosphorus forms number of oxoacids showing different basicity depending upon their structures and also act as reducing agents.Their reducing strength depends upon number of Phosphorus Hydrogen bonds.


This Channel initiated by Dr. D. R. Vij (former Professor of Physics, Kurukshetra University, India) primarily aims at taking free education to the doorsteps of learners who for various economic and social factors can not avail benefits of regular coaching.

In view of the congested classrooms coupled with hefty tuition fee, social taboos and hazards of travelling (for girls in particular) this mode of extending education had become a necessity.

This self-learning approach is a definite step towards democratisation of education i.e. taking education even to individuals who staying in remote and far off areas were being deprived of education for no fault of theirs.

Viewers are requested to click LIKE button if they like a video and SUBSCRIBE to this channel to get notifications of more video lessons being uploaded from time to time in future. They are also requested to SHARE videos with nears and dears who can be benefitted.

All video lessons are systematically indexed on the website: www.gianmandir.com wherein one can register free of cost. All videos are also available through our “Gianmandir” APP which can be downloaded from Google Play Store.

With thanks
Dr. D. R. Vij
Professor of Physics (Retd.)
(Mob) +919416220316