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What do you mean by hydration enthalpy

Posted by Megha U.S 6 years, 11 months ago

1 answers

Prakhar J 6 years, 11 months ago

The hydration enthalpy is the enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution. Hydration enthalpies are always negative.............??

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What is radioactive decay ?

Posted by Sheikh Hisba 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Shrishti Patel 6 years, 11 months ago

Radioactive decay is a process by which unstable atomic nucleus looses energy by emmiting radiation.

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At 25°c and 760mm of Hg pressure or gas occupies 600ml volume.what will be its pressure at a height where temperature is 10°c and volume of the gas is 640ml.

Posted by Mrinmoy Bora 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Anushree Agrawal 6 years, 11 months ago

According to combined gas law, p1v1/t1=p2v2/t2 Put the given values and find value of p2 .

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10ml of a given solution of H2O2 contain 0.91g of H2O2 express its strength in volume

Posted by Diksha Singroha 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Vander wall constant for Co2 are a=36 L^2atom mol inverse and b=.0428L mol inverse calculate Tc and Pc and Vc.

Posted by Dev Mstt420 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

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Lattice Enthalpy ko easy way me samja do koi please mere ko samj hi nhi aa rha hai, bar bar pdh rhi hu phir bhi nhi smj aa rha ??

Posted by ?????Geetanjali???? ? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Patel Salahuddin 6 years, 11 months ago

To remove an electron from gaseous atom

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Aman Kumar 6 years, 11 months ago

In simple word....Lattice enthalpy= charge /radius.......So, if radius decreases then lattice enthalpy increases and vice versa...for example:-( Li) has small size that means it has high lattice energy.....similarly, for example, take ,Calcium....it has large size that means ...leass lattice enthalpy is required to break the bond....

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Diksha Singroha 6 years, 11 months ago

the energy required to separate the ions of a crystal to an infinite distance

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Penetration power

Posted by Kunal Lakra 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is the use of borax

Posted by Shekhar Suman 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Sangeeth M?? 6 years, 11 months ago

Borax bead test in laboratory

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Md Mushraf 6 years, 11 months ago

Borax is used in leather industry ,medicinal soaps etc.

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?????Geetanjali???? ? 6 years, 11 months ago

Used in carpet cleaning, borax cleans violin strings, borax removes rust, used in cleaning outdoor furniture

1Thank You

Rupesh Kumar 6 years, 11 months ago

In manufacturing of glass

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Write down the conjugate acid for the bronsted base CN- and F-

Posted by Vinit Malik 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Annie D'Souza 6 years, 11 months ago

HCN of CN- and HF of F-

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What is the accurate definition of transition elements?

Posted by Rishita Shishir ?✏ 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Sagar Gupta 6 years, 11 months ago

Elements which have partially filled d or f block are called transition elements

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ANSWER

Significance of Uncertainty Principle..in short and simple

Posted by Chethna K 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Shekhar Suman 6 years, 11 months ago

The Heisenberg uncertainty principle is a law in quantum mechanics that limits how accurately you can measure two related variables. Specifically, it says that the more accurately you measure the momentum (or velocity) of a particle, the less accurately you can know its position, and vice versa

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Solid state important topics

Posted by R V Singh 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Sangeeth M?? 6 years, 11 months ago

Packing efficiency,problems

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Calculate pay load when a balloon of radius 10m, mass 100kg is filled with helium at 1.66 bar at 27 c

Posted by Bhanu Chillar 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

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Any Kvian here Pls I want some guidance from you

Posted by Rajaditya Shrivastava 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is moleculer orbital theory

Posted by Badal Gouda 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Shekhar Suman 6 years, 11 months ago

what is Molecular orbital theory Results in English आणविक कक्षीय सिद्धांत क्या है हिन्दी में नतीजे Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory Image result for what is Molecular orbital theory View all Molecular orbital theory uses a linear combination of atomic orbitals to represent molecular orbitals resulting from bonds between atoms. These are often divided into three types, bonding, antibonding, and non-bonding. ... The molecular orbitals of a molecule can be illustrated in molecular orbital diagrams.

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Yogita Ingle 6 years, 11 months ago

Molecular orbital theory is a method developed in the beginning of twentieth century by F. Hund and R. S. Mulliken to describe the structure and properties of different molecules. Before molecular orbital theory, there was no clear and distinctive theory about the bonding and non-bonding electrons and how their arrangement in a molecule affects the structure of the molecule. In this method the electrons are not assigned to a particular bond between atoms, rather they are treated as moving under the influence of the nuclei of the molecule. The space in a molecule in which the probability of finding an electron is maximum is known as molecular orbital.

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What is formula of boyle law

Posted by Shubham Garg 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Punit Jangir 6 years, 11 months ago

P1v1=p2v2

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Vishal Bihari 6 years, 11 months ago

Boyle's law= P1V1=P2V2.

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Abhay Pal 6 years, 11 months ago

P1/p2=v2/v1

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Ritu Thapliyal 6 years, 11 months ago

P1×V1=P2×V2

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Which is more acidic -ethanoic acid or methanoic acid?

Posted by Gurdeep Shira 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Jahnvi Singh 6 years, 11 months ago

Ethanoic acid

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Anshika Gupta 6 years, 11 months ago

I agree,formic acid is more acidic in nature.

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Harshita Maurya 6 years, 11 months ago

methanoic acid doesn't contain electron releasing group and there is no inductive effect.The larger the positive inductive effect, the lesser will be the strength of an acid. Hence, methanoic acid (formic acid) is stronger than ethanoic acid

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Diksha Singroha 6 years, 11 months ago

Methanoic acid is more acidic

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What is the oxidation number of Fe in [Fe(CN)6]4-

Posted by Diksha Singroha 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Manish Sahu 6 years, 11 months ago

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Urvi Agrawal 6 years, 11 months ago

Let the oxidation no. of Fe be x x + -6 = -4 x = +2

2Thank You

Nancy Rajput 5 years, 8 months ago

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What is enthalpy of neutrisation??

Posted by Harsh Dhiman 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Diksha Singroha 6 years, 11 months ago

The enthalpy of neutralization (ΔHn) is the change in enthalpy that occurs when one equivalent of an acid and one equivalent of a base undergo a neutralization reaction to form water and a salt. It is a special case of the enthalpy of reaction. It is defined as the energy released with the formation of 1 mole of water.

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Predict shape of sf4 using vsepr. Also give the reason for the stability of the acquired shape.

Posted by Sujal Aggarwal 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Akanksha Kumari? 6 years, 11 months ago

Tetrahedral as it is sp3 hybridrised and all sp3 hybridised molecules have Tetrahedral shape predicted by vsepr

2Thank You

Dhruvin Suryavanshi 6 years, 11 months ago

Tetrahedral

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Whenever areaction between an oxidising agent and a reducing agent is carried out a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess jstify this statement giving three illustrations

Posted by Jaynarayan Kushwaha 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

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Define Aromaticity . ?

Posted by Jasmine Jasmine 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Jasmine Jasmine 6 years, 11 months ago

Thanks

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Vinay Gautam 6 years, 11 months ago

plz tell us how to upload pics on this app

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Gaurav Seth 6 years, 11 months ago

Aromatic compounds are substances that consist of one or more rings that contain alternating single and double bonds in its chemical structure. In real life, many aromatic compounds have an odor, however, there are some compounds that are chemically aromatic, but do not have a distinct smell.

For example, benzene is an aromatic compound.

2Thank You

Gaurav Seth 6 years, 11 months ago

The term 'aromatic' is used by chemists for substances with distinct odors. In this lesson, we will learn all about aromatic compounds, the features of such compounds' chemical structures, and Huckel's Rule.

What Are Aromatic Compounds

Take a moment and think of substances that have a strong fragrance. What kind of things come to your mind? Perfume, vanilla or, perhaps, even cinnamon? All of these are fragrant or aromatic. While they certainly smell differently, they do have something in common: these substances are made of aromatic compounds.

<caption align="bottom">These substances are made of aromatic compounds.</caption>

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What is inert pair effect?☺☺

Posted by Hemant Ritesh Sourashtriya 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar J 6 years, 11 months ago

The inert pair effect is the tendency of the two electrons in the outermost atomic s-orbital to remain unionized or unshared in compounds of post-transition metals. Due to this, the element down the group possess lower oxidation state of that group and becomes stable....??

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What is the definition of covalent Bond

Posted by Vanshita (Gungun) 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Naitik Tayal 6 years, 11 months ago

The force of attaraction created between homo or hetero nuclear atoms by mutual sharing of electron is called covalent bond

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Akanksha Kumari? 6 years, 11 months ago

Bond formed due to sharing of eletron

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Rishi Kumar 6 years, 11 months ago

The bond which is formed by mutal sharing of electron between two atoms

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Jatin Saini 6 years, 11 months ago

bond in which one or more pairs of electron are shared by two atoms

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How many questions from equllibrium chapter come in the final examination?is there any specific question numbers for this chapter?

Posted by Mamta Sharma 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Vanshita (Gungun) 6 years, 11 months ago

101 question asked

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Define the methods of preparations of alkane...!!

Posted by Ravi Kushwaha 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar J 6 years, 11 months ago

1 .Decarboxylation....... 2. Wurtz Reaction... 3.By the Reduction of Alkyl Halides..... 4. By Hydrogenation of Alkenes((>C=C<) .... 5. Kolbe's Electrolysis Method.

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Define nucleophiles

Posted by Gayatri Devi 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Prakhar J 6 years, 11 months ago

Nucleophiles are the anions or electron rich compounds that donate electrons. These are nucleus ( + ve charge) loving. Eg. OH``, Cl``, Br`` , PCl5 ( electron rich).

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Ravi Kushwaha 6 years, 11 months ago

Nucleophiles:- a nucleophile is an attacking reagent with love or attraction for the nucleus of positive centre. It is therefore either negatively charged or neutral but with atleast one lone pair of electrons which it can easily donate.

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What is carcinogenicity????

Posted by Ankit Singh ?????? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Sruthi Prabha 6 years, 11 months ago

Cancer producing agent

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Nancy Rajput 6 years, 11 months ago

may be this related to cancer A substance or agent that can cause cells to become cancerous by altering their genetic structure so that they multiply continuously and become malignant. Asbestos, DDT, and tobacco smoke are examples of carcinogens.

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What is newman projections ???? Please explain in easier way

Posted by Ankit Singh ?????? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 11 months ago

In Newman projection, the carbon-to-carbon bond conformation is viewed head on, that is front to back.
The carbon atom at the front is represented as a dot and the carbon atom at the back is represented as a circle.
The hydrogen atoms attached to the carbon atoms are shown by lines. The bond angle between these lines is kept at 120 degrees.
The hydrogen atoms connected to the carbon atom in the front are represented by longer lines, and those connected to the carbon atom at the back are represented by shorter lines.

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What are reducing agents?

Posted by Rohan Pant 6 years, 11 months ago

CBSE > Class 11 > Chemistry