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Sai Sharan Raj 4 years ago

Write the named reactions separately and make your own notes.

ANSWER

New syllabus of chemistry which is reduced plz

Posted by Shagun Tyagi 4 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Shagun Tyagi 4 years ago

Plz help

Shagun Tyagi 4 years ago

Sir mujhe ni milra h

Vivek Chaurasia 4 years, 1 month ago

Esi app par new syllabus dekh loo reduce ka

ANSWER

Process of chelation

Posted by Md. Rashid Khan 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Aaditya Kushwah 4 years ago

When a ligand bonded with a transition element and forms a ring like structure it is called chelation

ANSWER

Kendriya dhaatu praman kya hai

Posted by Prabhakar Singh 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Vivek Chaurasia 4 years, 1 month ago

Bhiya thoda English word ka priyog kre??

ANSWER

Arrange the oxide of nitrogen in the increasing order of their oxidising strength

Posted by Vinay Malik 4 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

P block elements notes

Posted by Kajal Rao 4 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Alok Yadav 4 years ago

Prefer whole Ncert

Yogita Ingle 4 years, 1 month ago

The p-Block elements: Elements belonging to groups 13 to 18 of the periodic table are called p-block elements.
General electronic configuration of p-block elements: The p-block elements are characterized by the ns2np1-6 valence shell electronic configuration.

Representative elements: Elements belonging to the s and p-blocks in the periodic table are called the representative elements or main group elements.

Inert pair effect: The tendency of ns2 electron pair to participate in bond formation decreases with the increase in atomic size. Within a group the higher oxidation state becomes less stable with respect to the lower oxidation state as the atomic number increases. This trend is called ‘inert pair effect’. In other words, the energy required to unpair the electrons is more than energy released in the formation of two additional bonds.

3Thank You

ANSWER

Iupac name of glycerin

Posted by Ankita Gurjar 4 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Jass . 4 years, 1 month ago

Propan-1,2,3-triol

Yogita Ingle 4 years, 1 month ago

Glycerol, also known as glycerin or glycyl alcohol, belongs to the class of organic compounds known as sugar alcohols.

ANSWER

How much syllabus is completed in school???? Ur

Posted by Sakshi Hello 4 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Puspa Patail 4 years ago

Nearly 5 chapter

Tanya ?? 4 years, 1 month ago

4 chapter rehte h abhi

ANSWER

Structure of perfluorobenzene

Posted by Shubham Burman 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Sahil Bachhodiya 4 years ago

Fluorine on 4th position on benzene

ANSWER

Complete the reaction CH3-CH2-CH=CH-CH3+HCl----->

Posted by Aaysha Siddiqui 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Souptika Ghosh 4 years, 1 month ago

CH3-CH2-CH2-CHCl-CH3+ CH3-CH2-CHCl-CH2-CH3

ANSWER

Give the mechanism of peroxide effect.

Posted by Saumya Joshi 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 4 years, 1 month ago

Peroxide effect or kharasch effect or anti-markovnikoff rule is applicable when HBr reacts with unsaturated hydrocarbon in the presence of peroxide. In this reaction, the Br atom gets attached to that doubly bonded carbon atom which has more number of hydrogen atoms attached to it while H atom if HBr gets attached to the other carbon atom which has less number of hydrogen atoms.

E.g:- CH₃-CH=CH₂ + HBr(peroxide) → CH₃-CH₂-CH₂-Br

It is an example of free radical addition reaction.

ANSWER

What happens when bromine attacks CH2=CH-CH2-C=CH

Posted by Gurleen Kaur 4 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Is galvonic cell important to study?

Posted by Anchal Gupta 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tanya ?? 4 years, 1 month ago

This topic is not in syllabus for this year dear...but if u want to study then u can but no question will come from this topic on exam for this year only..

5Thank You

ANSWER

isopropyl chloride to 2 methylpropionaldehyde

Posted by Rohit Mathur 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Arul Dhavan 3 years, 7 months ago

ch3ch(ch3)cl with HCN to ch3ch(ch3)CN ___~hydrolysis gives ch3ch(ch3)cooH then reduction with LiAlH4. gives alcohol (ch3ch(ch3)oH. then add pcc (pyrimidine chloridechromate) to give 2 methyl propionaldehyde. ☺️

6Thank You

ANSWER

Amorphous and crystalline solids

Posted by Aina Parvez 4 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 4 years, 1 month ago

Crystals have an orderly arrangement of their constituent particles. In comparison, amorphous solids have no such arrangement. Their particles are randomly organised.
Crystals have a specific geometric shape with definite edges. Amorphous solids have no geometry in their shapes
Crystalline solids have a sharp melting point on which they will definitely melt. An amorphous solid will have a range of temperature over which it will melt, but no definite temperature as such
Crystals have a long order arrangement of their particles. This means the particles will show the same arrangement indefinitely. Amorphous solids have a short order arrangement. Their particles show a lot of variety in their arrangement.
Crystalline solids cleavage (break) along particular points and directions. Amorphous solids cleavage into uneven parts with ragged edges.

Tanya ?? 4 years, 1 month ago

Amorphous solids, such as glass, are those solids that do not have any underlining order in their molecular structure. On the other hand, crystalline solids are those solids that have a well defined order in their structure.

3Thank You

ANSWER

Molecular, ionic, covalent and metallic solids

Posted by Aina Parvez 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tanya ?? 4 years, 1 month ago

Ionic crystals are composed of alternating positive and negative ions. Metallic crystals consist of metal cations surrounded by a "sea" of mobile valence electrons. Covalent crystals are composed of atoms which are covalently bonded to one another. Molecular crystals are held together by weak intermolecular forces.

ANSWER

Classification of solids based on different binding forces

Posted by Aina Parvez 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Meghna Thapar 4 years, 1 month ago

Classification of Crystalline Solids based on Different Binding Forces. Crystalline solids can be classified into different categories depending upon the type of constituent particles and the nature of attractive forces operating between them.

Atomic Solids
In these solids the constituent particles are atoms. These closely packed atoms are held up by London dispersion forces. Some examples are crystals of noble gases. Such solids are very soft, possess very low melting points and poor conductors of heat and electricity.

Molecular Solids
In these solids, the constituent particles which pack up together are molecules of the substance. These molecules may be non – polar (dipole moment = 0) such as etc. or they may be polar (dipole moment > 0) like etc.

In case of non – polar molecules, the attractive forces operating between the molecules are Vander Waal forces (also called dispersion forces). The example of such solids are : dry ice (Solid, iodine (crystals).

In case of polar molecules, the attractive forces operating between the molecules in solid state are dipole – dipole forces. The examples of such solids are : solid, solid HCl. However, in some solids with polar molecules, the interparticle forces are hydrogen bonds. The examples of such solids are ice; solid hydrogen fluoride (HF); solid ammonia, etc.

ANSWER

2. Which among the following show negative deviation? a. Chloroform and benzene b. Acetone and benzene c. Methyl alcohol and water d. Carbon tetrachloride and chloroform

Posted by Aarish Hasan 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Anchal Gupta 4 years, 1 month ago

Choloform and benzene

ANSWER

How to convert propane to propan-2-ol?

Posted by Komal Jena 1 year, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Ashutosh Polai 4 years, 1 month ago

Good

Tarush Raj Tiwari 4 years, 1 month ago

First convert propane to chloropropane by halogenation reaction in presence of sunlight CH3-CH2-CH3 + Cl2 → CH3-CH2-CH2Cl + HCl Chloropropane can be converted into propene by using alcoholic KOH CH3-CH2-CH2Cl + alc. KOH → CH3-CH=CH2 To convert from Propene to Propan-2-ol, the addition of H2SO4 takes place in accordance with Markovnikov ‘s rule

ANSWER

What is optically active and optically inactive????

Posted by Pradeep Solanki 4 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 4 years, 1 month ago

When plane polarized light is passed through a substance, it may or may not rotate the plane of the plane polarized light. The substance which does not rotate the plane of the plane polarized light is known as optically inactive compound, while a substance which rotates the plane of the plane polarized light is known as optically active substance.

Anas Ansari 4 years, 1 month ago

Glycine

ANSWER

Acidity of beta hydrogen plays an important role during elimination .explain.

Posted by Vivek Chirmade 4 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is screening effect ?

Posted by Pardeep Chaudhary 4 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Devil ? 4 years, 1 month ago

Protection of outer shells from influence of nuclear force .

Bbavya Mittal 4 years, 1 month ago

When force of attraction felt by outer electrons are reduced by inner most electrons

Rishika Neogi 4 years, 1 month ago

Screening effect is also known as the shielding effect. The phenomenon which occurs when the nucleus reduces its force of attraction on the valence electrons due to the presence of electrons in the inner-shell. This is known as a screening effect

ANSWER

Elements of group 16 17 and 18 nots

Posted by Shailaja Kamble 4 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why haloarenes cannot prepare by alcohol?

Posted by Anisha Kabsuri 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 4 years, 1 month ago

Due to resonance in phenol, C— O bond of phenol has some partial double bond character, which strengthens the bond. So, it is difficult to break this C— O bond of phenol while the C— O bond of alcohol is purely single bond and comparatively weaker bond. So, alkyl halides can be prepared by the reaction of alcohols with HCl in the presence of ZnC{{l}_{2}} while aryl halides cannot be prepared by the reaction of phenol with HCl in the presence of ZnCl2.

ANSWER

Why group 16 element call as chalcogen?

Posted by Insha Khalid 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Meghna Thapar 4 years, 1 month ago

The group 16 elements of modern periodic table consist of 5 elements oxygen, sulphur, selenium, tellurium and polonium. The elements in this group are also known as the chalcogens or the ore-forming elements because many elements can be extracted from the sulphide or oxide ores. The group VIA elements are called chalcogens because most ores of copper (Greek chalkos) are oxides or sulfides, and such ores contain traces of selenium and tellurium.