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The molar conductivity of a solution at infinite dilution is known as limiting molar conductivity. In other words, When the concentration of the electrolyte approaches zero, the molar conductivity is known as limiting molar conductivity.

The limiting molar conductivity of an electrolyte is defined as its molar conductivity when the concentration of the electrolyte in the solution approaches zero.

The conductivity of an electrolyte solution is the conductance of ions present in a unit volume of the solution. The number of ions (responsible for carrying current) decreases when the solution is diluted or the concentration is decreased. As a result, the conductivity of an electrolyte solution decreases with the decrease in concentration.

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Write the thermodynamic equarion predicting the feasibility of a reaction and explain the terms involved in it

Posted by Blaster Ter 5 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Vikas Shukla 5 years, 6 months ago

ΔG=ΔH - TΔS. In this equation if ΔG is -ve, then the reaction is feasible and spontaneous. ΔG = free energy in the system. ΔH = enthalpy(it determines whether the heat is given to system or whether system gives heat) .... T= temperature (that is constant) and ΔS signifies entropy (Randomness of the molecules present inside the system). Now, from the equation it is clear that the product of T and ΔS must be large enough than ΔH only then can be the reaction feasible. If ΔS +ve then enthalpy must be much -ve and vice-versa . In short ΔG <0 this is must for reaction to be feasible . Just pay attention to sign convention and u will understand it :)

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What will be the emf and nernst equation of pt | Br2 +Br-.01M||H+ 0.030M/ H2

Posted by Melody Queen 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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What is an example for instaneous reaction

Posted by Jaya Varshini 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Ayush Vishwakarma?? 5 years, 6 months ago

Naoh +Hcl --------> Nacl +H20 it is also instantaneous reaction

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Ayush Vishwakarma?? 5 years, 6 months ago

Na+ H20 -----------> Naoh + H2 It is instantaneous reaction

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How we calculate no.of atoms in packing efficiency structure

Posted by Anish Kumar 5 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Vikas Shukla 5 years, 6 months ago

Packing efficiency isn't a structure itself. Rather it gives information about how much space in the lattice is being occupied by atoms and how much space in vacant. See it's name tells itself that how much efficient is the lattice to pack the atoms in it

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Why ZnO appear yellow on heating??

Posted by Nisha Yadav 5 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Priyanshi Sojitra 5 years, 6 months ago

Due to f centre

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Khushi....? ??‍? 5 years, 6 months ago

Zinc oxide is white in color but on heating, it turns into yellowbecause it loses oxygen reversibly at high temperature.

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Vikas Shukla 5 years, 6 months ago

In ZnO , Zn2+ ions occupy interstitial sites. Electrons are trapped in interstitial sites as well to maintain the electrical neutrality. Zinc oxide is white in colour but on high temperature it loses oxygen reversibly and turns yellow in colour.

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Why gelatin is added in ice cream

Posted by Bholekabhakt ❤️ 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Vikas Shukla 5 years, 6 months ago

Ice cream is an emulsion . To make it stable an emulsifying agent must be added to it. Therefore gelatin (an emulsifier) is added to it.

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How to convert Ethyl formate to benzaldehyde

Posted by Archi Kwatra 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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What is the co ordination number of each type of ions in a rock salt type crystal structure

Posted by Sonam Kumari 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Priyanshi Sojitra 5 years, 6 months ago

Six

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Anish Kumar 5 years, 6 months ago

Six

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Khushi....? ??‍? 5 years, 6 months ago

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Aakash Kumar 5 years, 6 months ago

CN of each type of ion in rock salt structure =6

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Why we can't store vitamin C in our body

Posted by Rohit Deshwal 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Khushi....? ??‍? 5 years, 6 months ago

Vitamin C is a water-soluble vitamin, which means it dissolves in water. In contrast to fat-soluble vitamins, water-soluble vitamins do not get stored within the body. Instead, the vitamin C that you consume gets transported to your tissues via body fluids, and any extra gets excreted in urine.

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When 3.26g of selenium dissolved in 226g of benzene the observed frezzing point is 0.1120C lower than for pure benzene. Find out the molecular formula of selenium ( At mass Se = 78.8g / mol, Kf = 4.9 K kg / mol)

Posted by Aashrity .... 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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What are the reasons behind mendel complete dominance and incomplete dominance

Posted by Gurleen Kaur 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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How surface area effect adsorption

Posted by Sandeep Kaur Kaur 5 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Khushi....? ??‍? 5 years, 6 months ago

Since adsorption is a surface phenomenon, adsorption increases with the increase in the surface area of the adsorbent. More finely divided or rougher the surface of adsorbent, the greater will be the surface area and hence the greater will be the adsorption.

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Kareena Yadav 5 years, 6 months ago

As we increase the surface area of the adsorbent 5hen adsortion increases

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Yogita Ingle 5 years, 6 months ago

When we increase the surface area of the adsorbent there is an increase in the adsorption of gases. This is because when we increase the surface area there is more number of adsorbing sites. So finely divided solids and some porous substances are good adsorbents.

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Hii friends

Posted by Sumit Kumar 5 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Kareena Yadav 5 years, 6 months ago

Hii

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Da Ya 5 years, 6 months ago

Hiii

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Tanvi Sharma 5 years, 6 months ago

Hello

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Reverse osmosis explain? Why it is important for us .

Posted by Ayush Vishwakarma?? 5 years, 6 months ago

CBSE > Class 12 > Chemistry

5 answers

Ayush Vishwakarma?? 5 years, 6 months ago

I will answered your ques. Today,

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Khushi....? ??‍? 5 years, 6 months ago

Can you plzzz answer my maths questions and one of the question you asked earlier just see yoir question bank I had answered in that....plzzz...??....

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Ayush Vishwakarma?? 5 years, 6 months ago

Thnq for answer of all my question.

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Kareena Yadav 5 years, 6 months ago

When the pressureis applied more than osmotic pressure is called reverse osmosis It is mainly use in desealination of sea water

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Khushi....? ??‍? 5 years, 6 months ago

Reverse osmosis (RO) is a water purification process that uses a partially permeable membrane to remove ions, unwanted molecules and larger particles from drinking water. In reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property that is driven by chemical potential differences of the solvent, a thermodynamic parameter. Reverse osmosis can remove many types of dissolved and suspended chemical species as well as biological ones (principally bacteria) from water, and is used in both industrial processes and the production of potable water. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be "selective", this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as solvent molecules, i.e., water, H2O) to pass freely.

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A compound is formed by two elements m and n . The element n forms ccp and atoms of m occupy one third of tetrahedral voids. What is the formula of the compound?

Posted by Aishwary Pal 5 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 8 months ago

The element N forms ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound? It is given that the atoms of element M occupy 1/3rd of tetrahedral voids. Hence , the formula of the compound is M²N³.

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Ch3cooch2ch3 + pd/h2

Posted by Krishna Suresh 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Molality and molarity formula

Posted by Prakhar Bhatt 5 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Ayush Vishwakarma?? 5 years, 6 months ago

Number of moles of solute divided by mass of solvent in kgs is called molality. Second term is molarity define as the number of moles of solute is divided by one litre of solution is called molarity

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Rohit Krishna 5 years, 6 months ago

M =n2/V1(in L) and m= n2/w1(in kg)

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Rohit Krishna 5 years, 6 months ago

Molality m = no. of moles of solute/ weight of solvent in kg (if weight of solvent is in grams then multiply the above eqn with 1000).....Molarity M = no. of moles of solute /volume of solution in litres (If the volume is in mL, multiply the above eqn with 1000)....

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What do u mean by auto catalyst?

Posted by Happy Kumar 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Khushi....? ??‍? 5 years, 6 months ago

An autocatalyst is a cylinder or elliptical cross section made from ceramic or metal formed into a fine honeycomb and coated with a solution of chemicals and a combination of platinum, rhodium and/or palladium.

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Ayush Vishwakarma?? 5 years, 6 months ago

Catalyst is the substance which increases or decreases the rate of reaction a small part of catalyst increases or decreases the reaction there are many types of catalyst like homogenous, hetrogenous etc.

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Yogita Ingle 5 years, 6 months ago

In autocatalysis, the reaction is catalyzed by one of its products and that catalyst is called Autocatalyst. One of the simplest examples of this is in the oxidation of a solution of oxalic acid by an acidified solution of potassium manganate (VII) (potassium permanganate). The reaction is very slow at room temperature

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How many bridging oxygen atom are present in p4o10

Posted by Ankita ?? Arpita☺️ 5 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Khushi....? ??‍? 5 years, 6 months ago

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? ? 5 years, 6 months ago

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Kohlrausch's law

Posted by ..... ..... 5 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Khushi....? ??‍? 5 years, 6 months ago

Kohlrausch's law states that the equivalent conductivity of an electrolyte at infinite dilution is equal to the sum of the conductances of the anions and cations. ... The molar conductivity of a solution increases with the decrease in concentration.

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Yogita Ingle 5 years, 6 months ago

Kohlrausch law of independent migration of ions

The Kohlrausch law of independent migration of ions states that limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte.

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explain about zone refining

Posted by Veda Ravela 5 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Khushi....? ??‍? 5 years, 6 months ago

Zone refining is a method of purifying a crystalline solid, typically a semiconductor or metal, by causing a narrow molten zone to travel slowly along an otherwise solid rod or bar to one end, at which impurities become concentrated.

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Yogita Ingle 5 years, 6 months ago

It is used for refining Si,B,Ga,In etc. Impurities are more soluble in the molten state of metal than in solid state. There is a circular mobile heater at one end of a rod of impure metal. Heater and the molten zone moves from one end to another end. Pure metal crystallizes out of the melt and the impurities pass onto the adjacent molten zone. Repetition of this process several times segregates impurities at one end of a rod. The end with impurities can then be cut off.

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When an electrolyte dissolve in water?

Posted by Khushee Shah 5 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Khushi....? ??‍? 5 years, 6 months ago

Substances that give ions when dissolved in water are called electrolytes. They can be divided into acids, bases, and salts, because they all give ions when dissolved in water. These solutions conduct electricity due to the mobility of the positive and negative ions, which are called cations and anions respectively.

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Yogita Ingle 5 years, 6 months ago

If the hydration energy is equal to or greater than the lattice energy, then the salt is water-soluble. In salts for which the hydration energy is higher than the lattice energy, solvation occurs with a release of energy in the form of heat.

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Explain the following phenomenon giving reasons:- a) Brownian movement. b)Kraft temperature. (2 mks) Your answer

Posted by Emma Palden 5 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 5 years, 6 months ago

Brownian movement : Continuous zig-zag movement of colloidal particales in a colloidal sol is called Brownian movement. The reason for Brownian movenent is based on the fact that the molecules of dispersion medium due to their kinetic motion strike against the Colloidal Particles from all sides with different forces. The resultant force cuased them to move.
(iii) Physiisoption is an exothermic process
Solidadsorbent+Gasadsorbate⇔Gas/Solid + HeatSolidadsorbent+Gasadsorbate⇔Gas/Solid + Heat
According to Le Chatelier's Principle, if we increase the temperature, equilibrium will shift in the backward direction, i.e., gas is released from the surface on which it is absorbed.

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Write the mechanism of Ch2Ch2OH→Ch2Ch2+H2O

Posted by Roziine Jasmine 5 years, 6 months ago

CBSE > Class 12 > Chemistry