Chapter 07 – P-Block 15 Group Elements

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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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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(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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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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Dr. D. R. Vij
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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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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.

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Dr. D. R. Vij
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(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.

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Dr. D. R. Vij
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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.

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Dr. D. R. Vij
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(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.

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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.

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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.

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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.

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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 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.

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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.

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

Class XI - Chemistry
Unit 11 - p-Block Elements
Sample Problems Based on p-Block Elements
Problems Covering CBSE and Competitive Levels

This video is about some sample problems related to p-block elements. The problems are at CBSE as well as competitive level.


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 07 - p-Block 16 Group Elements
Oxygen Family

Chalgogens: General Characteristics - Physical State, Atomic and Ionic Radii, Ionization Energy, Electronegativity, Electron gain Enthalpy, Allotropy, Multiple Void Formation Tendency, Catenation, Oxidation State

This video is about general characteristics of group 16 elements - Oxygen family also called chalcogens (salt forming) . The properties discussed here are atomic and ionic radii, physical states, Ionisation energy, electronegativity, electron gain enthalpy, allotropy, catenation, tendency to form pπ-pπ and pπ-dπ bonds and tendency to show variety of oxidation states from -2 to +6. 


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 07 - p-Block 16 Group Elements
Chemical Properties Part-1

Oxygen Most Reactive, Reactivity Towards Hydrogen - Formation of Compounds like H2F, Comparative Study of their Shapes, Bond Angles, Volatility etc.
Reactivity Towards Oxygen Formation of di- and tri-oxides

This video is about some chemical properties of group 16 elements. All these react with hydrogen to form hydrides. Acidic character and reducing character of these hydrides increase down the group  but thermal stability decrease down the group. Group 16 elements react with oxygen to form two types of oxides - dioxide and trioxide . These oxide are acidic and down the group acidic character decreases.


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 07 - p-Block 16 Group Elements
Chemical Properties Part-2

Formation of Halides - Variety of Halides having different Shapes in different Oxidation States, Halides in +4 Oxidation State act as both Lewis Acid and Lewis Base, Anomalous Behaviour of Oxygen

This video is about the halides of group 16 elements and anomalous behaviour of oxygen. These elements form various halides in various oxydation states . Highest oxidation state of +6 is shown only in fluorides. Sulphur tetra fluoride acts as Lewis acid as well as Lewis base. Being the first member of the group Oxygen differs from rest of the group members due to its anomalous behaviour.


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 07 - p-Block 16 Group Elements
Dioxygen

Preparation - by Thermal Decomposition of Oxygen Rich Components, Manufacture by Fractional Distillation of Air and Electrolysis of Water,
Isotopes of Oxygen, Properties of Oxygen, Uses of Oxygen
Formation of various Oxides - Simple (acidic, Basic, Atmospheric and Neutral Oxides) and Mixed Oxides
Acidic and basic Trends of Oxides

This video is about the first element of group 16, Oxygen. It is prepared by various methods but commercial preparation is by fractional distillation of air or by electrolysis of water. It is a neutral gas which is quite reactive and reacts with numberof metals, nonmetals to form their oxides and also oxidises to number of compounds also. The binary compounds of oxygen are called oxides that may be simple (acidic , basic, neutral or amphoteric) or mixed oxides. The acidic character of oxides of a given element increases with increasing oxidation no. of element.


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 07 - p-Block 16 Group Elements
Ozone

Preparation - in Laboratory and in Atmosphere
Causes and Consequences of depletion of Ozone layer
Structure and Properties - Oxydizing Character, Quantitative Estimation of Ozone, Bleaching Action, Reducing Character
Ozonolysis.

This video is about ozone, a triatomic molecule of oxygen, formed in stratosphere by interaction of U V radiations with dioxygen. It is a neutral, pale blue, toxic gas having oxidising behaviour. It oxidises number. of elements and compounds due to nascent oxygen. It shows bleaching action also due to nascent oxygen. It also as  a reducing agent in presence of strong oxidising agents. It is a bent molecule having two resonating structures.


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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(Mob) +919416220316

Class XII - Chemistry
Unit 07 - p-Block 16 Group Elements
Sulphur

Allotropes of Sulphus - (i) Cyclic - Rhombic, Monoclinic, (ii) Chain structure of all these Allotropes

This video is about various allotropic forms of Sulphur. The cyclic allotropes of Sulphur are rhombic (orthorhombic or alpha sulphur) and monoclinic (beta sulphur). Both have puckered ring structure that differ in the arrangement. The chain allotrope also known as catena sulphur or plastic sulphur is amorphous .


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 XII - Chemistry
Unit 07 - p-Block 16 Group Elements
Compounds of Sulphur Part-1

Preparation of Sulphur Dioxide
Property - Acidic in Nature, Moist SO2 is a Reducing Agent due to Nascent Hydrogen
Bleaching Action (Temporary, Oxidising Agent in the presence of Reducing Agents
Uses - As Antichlor, As Disinfectant

This video is about preparation and properties of Sulphur dioxide. In Laboratory it is prepared by reaction of sodium sulphite with concentrated sulphuric acid. It is àcidic oxide having reducing character. Its bleaching power is also due to its reducing character hence temporary. It also acts as oxidising agent in presence of strong reducing agent. It is used as antichlor and disinfectant also. 


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.

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

Class XII - Chemistry
Unit 07 - p-Block 16 Group Elements
Compounds of Sulphur Part-2

Oxoacids of Sulphur - Various Oxoacids in different Oxidation States
Preparation of Sulphuric Acid by Contact Process

This video is about the oxoacids of Sulphur. Sulphur forms number of oxoacids like sulphurous acid, sulphuric acid, pyrosulphuric acid etc. but most common is sulphuric acid which is also known as Oil of Vitriol. It is manufactured by contact process  which involves oxidation of Sulphur dioxide to sulphur trioxide and its absorption in concentrated sulphuric acid to give oleum. Oleum is hydrolysed to give sulphuric acid. 


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 XII - Chemistry
Unit 07 - p-Block 16 Group Elements
Properties of Sulphuric Acid

Strong Dibasic Acid, Dehydrating Agent, Moderate Oxidising Agent, Reaction with Salt, Precipitating Reaction, Structure
Uses - As a Mild Oxidising Agent, Dehydrating Agent

This video is about the properties of sulphuric acid. It viscous, corrosive and strong dibasic acid forming two series of salts - hydrogen sulphates and sulphates. It is a mild oxidising agent due to evolution of nascent oxygen and also a strong dehydrating agent. It is also used for precipitation of metals like Ba, Ca, Sr and Pb as their sulphates.


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 XII - Chemistry
Unit 07 - p-Block 17 Group Elements
Halogens

General Characteristics - Atomic and Ionic Radii, Ionization Energy, Electron Gain Enthalpy, Electronegativity, Non-Metallic Character, Bond Dissociation Energy, Colour, Solubility, Compounds (both Ionic and Covalent), Variety of Oxidation States, Highly Reactive, Oxidising Character, Reactivity towards Hydrogen to form Hydrogen Halides, Variation in properties of Hydrogen Halides

This video is about general characteristics of group 17 elements called Halogens. Halogens are smallest elements with highest Ionisation energy, electronegativity and most negative electron gain enthalpy in their respective periods. The bond dissociation energy of fluorine is exceptionally low due to small size and strong interelectronic repulsion between the lone pairs of electrons. All halogens are coloured and form both ionic as well as covalent bonds.These are very reactive showing variety of oxidation states from -1 to +7. All are strong oxidising agents  and react with hydrogen to form hydrogen halides that are acidic in nature.


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 07 - p-Block 17 Group Elements
p-Block 17 Group Elements
Properties of Halogens

Reaction with Water, Reaction with Oxygen, Interhalogen Compounds, Anomalous Behaviour of Fluorine

This video is about some more chemical properties of group 17 elements. Fluorine oxidises water to oxygen, chlorine and bromine react with water to form hydrogen halide and hypohalous acid. Compounds of fluorine with oxygen are called fluorides of oxygen but of other halogens are called oxides. Halogens also react with each other to form inter halogen compounds. Fluorine being smallest behaves anomalously in various ways like H bond formation, strongest oxidising agent 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 XII - Chemistry
Unit 07 - p-Block 17 Group Elements
Chlorine

Laboratory Preparation by MnO2 and KMnO4
Manufacture by Deacon's Process and Electrolysis of Brine
Properties - Highly Reactive, Oxidising Agent, Reaction with Ammonia and with cold and dilute Alkali, Reaction with dry slaked lime, Bleaching Action, Reaction with Saturated and Unsaturated Hydrocarbons
Uses for Bleaching, Sterilization of drinking water

This video is about chlorine. In Laboratory chlorine is prepared using MnO2 or KMnO4. Commercially it is prepared by Deacon's process or chlor alkali process . It is highly reactive greenish yellow gas which reacts with almost all metals and non metals. Acts as strong oxidising agent due to evolution of nascent oxygen. It reacts with ammonia to form various products depending upon the relative amounts of ammonia and chlorine l. Reaction with alkali also gives different products under hot and cold conditions. It produces bleaching powder when treated with dry slaked lime.


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 07 - p-Block 17 Group Elements
Hydrogen Chloride

Preparation - By Reaction of Sodium Chloride and Concentrated Sulphuric Acid
Properties - Acidic, Reaction with Ammonia, Reaction with Active Metals, Aqua Regia, Reaction with Metal Salts like Carbonates, Hydrogen Carbonates and Sulphites

This video is about Hydrogen Chloride. In Laboratory it is prepared by the reaction of NaCl and concentrated H2SO4. Pure HCl is prepared by the reaction of H2 and Cl2. It is colourless acidic gas which produces dense white fumes of NH4Cl when reacts with NH3 gas. Aqueous HCl (hydrochloric acid ) evoles H2 gas when reacts with active metals and used for making aqua regia .


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 07 - p-Block 17 Group Elements
Oxoacids and Interhalogen Compounds

Preparation, Structures and some imortant Properties
Comparison of Acidic Strength of Oxoacids

This video is about oxoacids of halogens and Interhalogen compounds. Halogens form various oxoacids in +1, +3, +5 and +7 oxidation states, but Fluorine forms only one oxoacid due to small size and high electronegativity. The Interhalogen compounds are formed by direct reaction of halogens or by conversion of lower compounds to higher ones. These compounds are more reactive and have high boiling points than constituent halogen. The shapes of these compounds are easily predicted using VSEPR theory.


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 07 - p-Block 18 Group Elements
Noble Gases

General Characteristics - Radii, Ionization Energy, Electron Gain Enthalpy, Melting and Boiling Points, Liquifiability, Solubility in Water
Compounds of Noble gases - First Prepared by Neil Bertlett

This video is about general characteristics of group 18 elements . These are monoatomic noble gases having highest Ionisation energy, positive electron gain enthalpy and stable configuration. All these characteristics make these gases chemicaly inert.


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