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Ayushi Ayushi 6 years, 11 months ago

LiF is almost insoluble in water due to high lattice energy. But LiCl is soluble in water due to high hydration energy of Li+ ion. ... covalent character increases when increases the size of anion , that's why LiCl is soluble in acetone ( covalent compound ) but LiF is insoluble in acetone .

Nancy Rajput 6 years, 11 months ago

hopes it help you

Nancy Rajput 6 years, 11 months ago

LiF is insoluble in water. On the contrary, LiCl is soluble not only in water, but also in acetone. Reason: This is mainly because of the greater ionic character of LiF as compared to LiCl. The solubility of a compound in water depends on the balance between lattice energy and hydration energy. Since fluoride ion is much smaller in size than chloride ion, the lattice energy of LiF is greater than that of LiCl. Also, there is not much difference between the hydration energies of fluoride ion and chloride ion. Thus, the net energy change during the dissolution of LiCl in water is more exothermic than that during the dissolution of LiF in water. Hence, low lattice energy and greater covalent character are the factors making LiCl soluble not only in water, but also in acetone.

K. J 6 years, 11 months ago

Have high lattice enthalpy

ANSWER

Can Anybody tell me What is olefin ???

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

CBSE > Class 11 > Chemistry

2 answers

Ankit Singh 6 years, 11 months ago

Thanks for the answer ayushi mujhe bhi ye nahi pata tha answer

Ayushi Ayushi 6 years, 11 months ago

Olefin, also called alkene, compound made up of hydrogen and carbon that contains one or more pairs of carbon atoms linked by a double bond.

ANSWER

The molar enthalpy of vaporization of acetone is less than of water . Why?

Posted by Gajendra Patel 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Lavanya ❤️? 6 years, 11 months ago

Acetone does not have hydrogen bond, and thus intermolecular forces are comparatively weaker which makes it boil/evaporates fast, thus reducing the molar enthalpy of vaporization. Also, Acetone does not polar O-H bond contributing to low enthalpy. Water has non-polar region and also has strong hydrogen bond. Water has highly polar O-H bond which makes water boil at relatively higher temperature than acetone thus has enthalpy greater than that of acetone.

ANSWER

Define metamerism

Posted by @@Ditya ®°@Thore????? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Ankit Singh 6 years, 11 months ago

Your welcome adi

@@Ditya ®°@Thore????? 6 years, 11 months ago

Thanks ankit

Ankit Singh 6 years, 11 months ago

Origin of metamerism. metamer + -ism. Chem. the type of isomerism in which chemical compounds have identical proportions of the same elements and the same molecular weight, but have radicals differing in type or position, with resulting differences in chemical properties. Zool.

@@Ditya ®°@Thore????? 6 years, 11 months ago

Example also

ANSWER

Pls tell what book can i prefer for neet and jipmer

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

CBSE > Class 11 > Chemistry

1 answers

Aman Kumar 6 years, 11 months ago

U can go for last 36 years jee and neet question book, and u can also go for modern abc or pradeep or s.l arora....

ANSWER

what is equlibrium constant

Posted by Lk Kishan 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 6 years, 11 months ago

Law of mass action also forms the basis which states that the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients. Therefore, given the reaction –

aA(g) + bB(g) ⇔ cC(g) + dD(g)

By using the law of mass action here,

The forward reaction rate would be k+ [A]a[B]b
The backward reaction rate would be k– [C]c[D]d

where, [A], [B], [C] and [D] being the active masses and k+ and k− are rate constants of forward and backward reactions, also the a, b, c, d are the stoichiometric coefficients related to A, B, C and D respectively. However, at the equilibrium – the forward and the backward rates are equal, stating –

Rate of forward reaction = Rate of backward reaction

or,

where,

Kc is the equilibrium constant expressed in terms of the molar concentrations. The equation Kc = [ C ]c·[ D ]d / [ A ]a·[ B ]b

or, Kc = Kf / Kb is the Law of Chemical Equilibrium. The equilibrium constant is therefore related to the standard Gibbs free energy change for the reaction which is stated by the equation –

§Gº= -RT ln Keq

where T states the temperature, R is the universal gas constant and Keq is the equilibrium constant.

ANSWER

f benzoic acid is born in Bomb calorimeterthe temperature of the Bomb calorimeter increased by 0.53 degree celsius in the same Bomb calorimeter one gram of C 286. Then temperature increased by 2.04 degree Celsius.ΔH for combustion of C2H6

Posted by Smiling Face Forever 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Why there is not 4 bonds between carbon and carbon

Posted by Junaid ?? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Effect of branching of alkane chain on its boiling point.

Posted by Durgesh Niket 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 6 years, 11 months ago

becoz of the presence of branches the surface area and van der walls forces of attraction are very weak . Therefore the b.p decreases.

ANSWER

What is the passing criteria for class 11 PCM + Cs

Posted by Suman Bhandari 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 6 years, 11 months ago

yup mostly schools may yhi criteria hai.. ?

Ankit Singh 6 years, 11 months ago

Mere school me bhi same hai Darshana

Priya Dharshini ? 6 years, 11 months ago

36% or something like that. It depends upon ur school. Overall percentage in my school for passing is around 60%

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 6 years, 11 months ago

for passing u have to get at least passing marks in all the subject which is set by school according to my school each student should have at least 33 mark in each subject then he or she will be promoted to next class..

ANSWER

What does you mean by thermodynamics system?

Posted by Riji Machahary 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Ankit Singh 6 years, 11 months ago

???

Rudra Gupta 6 years, 11 months ago

Nice ankit sir

Ankit Singh 6 years, 11 months ago

Hope this will help u

Ankit Singh 6 years, 11 months ago

A thermodynamic system is a group of material and/or radiative contents. Its properties may be described by thermodynamic state variables such as temperature, entropy, internal energy, and pressure. ... The thermodynamic state of a thermodynamic system is its internal state as specified by its state variables.

ANSWER

Balanced three reaction by oxidation no. method other than ncert

Posted by Manish Jha 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Manish Jha 6 years, 11 months ago

Plz help me it is imp ......

ANSWER

What is an enthalpy?

Posted by Kartik Prakhar 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Manish Jha 6 years, 11 months ago

It is defined as the sum of internal energy of the system and product of pressure and volume. H = U + PV

ANSWER

Anhydrous AlCl3 is covalent in nature but hydrated AlCl3 is ionic? Explain

Posted by Priya Dharshini ? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Ankit Singh 6 years, 11 months ago

Please confirm my answer is correct or not

Ankit Singh 6 years, 11 months ago

This will help u Priya

Ankit Singh 6 years, 11 months ago

This change from covalent to ionic happens bcoz the ions are hydrated and the amount of hydration energy evolved exceed the ionization energy.

ANSWER

why He2 does not exist?

Posted by Jerry Nongspung 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Priya Dharshini ? 6 years, 11 months ago

Wlcm

Ankit Singh 6 years, 11 months ago

Thanks for the answer priya

Priya Dharshini ? 6 years, 11 months ago

Helium and the other inert gases have completely filled octets, and so they have zero valency. That means, their combining capacity is zero, and so they exist as monatomic molecules such as He, Ne, Ar etc. Helium atom has the electronic configuration 1s2. According to the molecular orbital theory, in a supposed He2 molecule, both the bonding and the antibonding orbitals will have 2 electrons each. And so, the bond order (half the difference in the numbers of bonding and antibonding electrons) for such a diatomic entity is zero. That means, the He2 molecule has no existence.

ANSWER

What would be the IUPAC name and symbol for elements with atomic number 122 , 127 , 135

Posted by Adarsh Rana 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar Jadaun ? 6 years, 11 months ago

122-Unbibiium 127-unbiheptium 135- untripentium

ANSWER

But-2-ene

Posted by Ashwani Kamlakar 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Rudra Gupta 6 years, 11 months ago

CH3-CH=CH-CH3

Yakshi ? 6 years, 11 months ago

If structure.......then sorry i can't help u .......Gaurav seth......can help u in this question.....???

Yakshi ? 6 years, 11 months ago

What do u want to ask????????

ANSWER

What do you mean by electro gane enthelpy an shielding effect

Posted by Deepak Sharma 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Ayushi Ayushi 6 years, 11 months ago

shielding effect describes the balance between the pull of electrons on valence electrons and the repulsion forces from inner electrons. The shielding effect explains why valence shell electrons are more easily removed from the atom. The effect also explains atomic size. The more shielding, the further the valence shell can spread out and the bigger atoms will be.

4Thank You

Ayushi Ayushi 6 years, 11 months ago

Electron gain enthalpy of an element is the energy released when a neutral isolated gaseous atom accepts an extra electron to form the gaseous negative Ion i.e. anion. We can denote it by Δ egH. Greater the amount of energy released in the above process, higher is the electron gain enthalpy of the element.

4Thank You

ANSWER

What is the Effect of temp on equi. Constt

Posted by Nia Maheshwari 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Ankit Singh 6 years, 11 months ago

V good answer ayushi

Ayushi Ayushi 6 years, 11 months ago

This is typical of what happens with any equilibrium where the forward reaction is exothermic. Increasing the temperature decreases the value of the equilibrium constant. Where the forward reaction is endothermic, increasing the temperature increases the value of the equilibrium constant.

ANSWER

What do you know about nuclear

Posted by Sandeep Kumar 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Jyotsana Singh 6 years, 11 months ago

Everything around you is made up of tiny objects called atoms most of the mass of each atom is concentrated in center(which is called nucleus). nuclear reactor produce just under 20% of the electricity in the USA there are over 400 power reactors in the world.they produce base-load electricity 24/7 without emitting pollutants.

ANSWER

What do you know about nuclean

Posted by Sandeep Kumar 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What is the order of stability of carbonates of alkali metals?

Posted by Suparna Agrawal 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Vipul Chaudhary 6 years, 11 months ago

Order of stability increses down the group in alkali metal It is due to the fact that a larger cation can stablise alarger anion and smaller cation can stablise a smaller anion????

Pragati Gola 6 years, 11 months ago

Order of stability increased down the group due to high lattice energy.

ANSWER

Difine Eletronegative

Posted by Yuvraj Palariya 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Ankit Singh 6 years, 11 months ago

Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

Ayushi Ayushi 6 years, 11 months ago

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

ANSWER

define disproportionation reaction

Posted by Jishan Khan 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Gaurav Rawat 6 years, 11 months ago

This is a reaction which act as both oxidizing as well as reducing agent

Pragati Gola 6 years, 11 months ago

It is a special kind of reaction in which same element undergoes oxidation as well as reduction .e.g. 2H2O2---2H20+O2,where the oxidation state of oxygen is -1 in H2O ,it oxidized to O2 (0) and reduced to -2 in H20

Faizan Khan?? 6 years, 11 months ago

Disproportion is a chemical reaction typically a redox reaction where a molecule is transformed into two or more dissimilar product

ANSWER

Define pauli's excelu principal

Posted by Devendra Yadav 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Prakhar Jadaun ? 6 years, 11 months ago

The Pauli exclusion principle is the quantum mechanical principle which states that two or more identical fermions cannot occupy the same quantum state within a quantum system simultaneously. I hope it may help u...??

Smriti Shikha 6 years, 11 months ago

Pauli's exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers.

ANSWER

Hesinberg uncertinity principle

Posted by Satish Kumar Saw 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Gaurav Rawat 6 years, 11 months ago

It states that it is impossible to measure the position and momentum of a moving particle

Smriti Shikha 6 years, 11 months ago

Heisenberg's uncertainty principle states that it is impossible to determine simultaneously, the exact position and exact momentum or velocity of an electron.

ANSWER

Explain about Second Ionization enthalpy???And why second ionization enthalpies of the alkaline earth metals are smaller than those of corresponding alkali metals....

Posted by Aman Kumar 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Aman Kumar 6 years, 11 months ago

Thank u

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 6 years, 11 months ago

✔️✔️The 2nd ionisation enthalpy is the enthalpy change when 1 mole of gaseous ions of an element each with a single +ve charge each lose an electron to form gaseous ions each with a double +ve charge.... ➡️2nd ionization enthalpy of alkaline earth metal is smaller than that of alkali metal becoz alkali metals aquire Nobel gas configuration after loosing 1 electrons.

ANSWER

What do you mean by tollen's reagent?

Posted by Ankit Aryan Shivan 6 years, 11 months ago

CBSE > Class 11 > Chemistry

5 answers

Ankit Singh 6 years, 11 months ago

Your welcome bro

Ankit Aryan Shivan 6 years, 11 months ago

Thanks Ankit???

Ankit Singh 6 years, 11 months ago

Tollens' reagent is a chemical reagent used to determine the presence of aldehyde, aromatic aldehyde, and alpha-hydroxy ketone functional groups. The reagent consists of a solution of silver nitrate and ammonia. It was named after its discoverer, the German chemist Bernhard Tollens.

Ankit Aryan Shivan 6 years, 11 months ago

This is chemistry question.

Kratos Jskfkg 6 years, 11 months ago

What is this ?

ANSWER

Define hybridization

Posted by Panku 45 Mahant 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

?????Geetanjali???? ? 5 years, 8 months ago

I hope you understand ☺☺

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

It may be defined as : The phenomenon of mixing of orbitals of the same atom with slight difference in energies so as to redistribute their energies and give new orbitals of equivalent energy and shape. The new orbitals which get formed are known as hybrid orbitals.

Ankit Aryan Shivan 6 years, 11 months ago

The phenomenon of mixing of pure orbital to form a hybrid orbital is said to be hybridization. With the help of hybridisation structure and shape of molecules or ions can be determine.

ANSWER

Which one is more acidic out of ethane,ethane,ethylene

Posted by Pushp Raj 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

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

☺☺☺☺

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

Ethyne is most acidic because it contains acidic hydrogen ( hydrogen connected with sp hybridised carbon ) %s character is 50%, hence most electronegative.

Yakshi ? 6 years, 11 months ago

You wrote ethane 2 times....