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Difference between electrochemical cell and electrolytic cell

Posted by Govinda Kumar 6 years, 2 months ago

1 answers

Sia ? 6 years, 2 months ago

(1) It is a device to convert chemical energy into electrical energy.	(1) It is a device to convert electrical energy into chemical energy.
(2) It is based upon the redox reaction which is spontaneous.	(2) The redox reaction is non-spontaneous and takes place only when electric energy is supplied.
(3) To set up this cell, a salt bridge or porous pot is used.	(3) No salt bridge is used in this case.

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Who discovered the charge of electron

Posted by Manoj Thakur 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Rani Tipale 6 years, 2 months ago

Mullikan

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Titration experiments of C2H2O4.2H2O

Posted by Manoj Thakur 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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The properties of liquid state

Posted by Kuttan Kuttan 6 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Pawni Chaudhary 6 years, 2 months ago

Properties of liquids are they are not rigid They can't compressed They can acquire the shape of vessel in which they kept Theh have high intermolecular space btw them They show viscosity They have definite volume They have high density then gases

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Somya Mehta 6 years, 2 months ago

The properties of liquids are as follo ws:-1. Liquids cannot be compressed easily.2. Liquids are not rigid in nature.3. Liquids have higher intermolecular spaces between them.4.

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What is Adiabatic process ??

Posted by Alok Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 2 months ago

An adiabatic process is a thermodynamic process in which the system is thermally insulated from the surroundings and the heat released or absorbed by the system is zero.

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Balancing equation based on the acidity nd bacicity

Posted by Saba Ansari 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Raghav Bansal 6 years, 2 months ago

By oxidation method we should find ox no of elements except ox and hydrogen then we have to balance ox no and then you can balance charge by adding h+ if acidic or by adding oh-

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Describe the characteristics of S and P block element chemical and physical properties

Posted by Imran Khan 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Somya Mehta 6 years, 2 months ago

The physical properties of S block are first they are highly electropositive in nature second they are most metallic in nature they are less electronegative in nature their size increases from top to bottom as their shells are increased

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Calculate the number of atoms in each of the following (1)52 moles of Ar (2)52 u of He (3) 52 g of He

Posted by Sarthak Sehgal 6 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Tarun Kumar 6 years, 2 months ago

Have a look on ncert solutipn on this app

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Abhishek Yadav 6 years, 2 months ago

Ans is wrong

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What is your hardest topic in chemistry

Posted by Saqlain Mustak 6 years, 2 months ago

CBSE > Class 11 > Chemistry

3 answers

Raghav Bansal 6 years, 2 months ago

Molecular theory

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Somya Mehta 6 years, 2 months ago

The hardest topic is the gaseous state

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Tiyasha . 6 years, 2 months ago

The topic that you does't understand

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BF3 don't have a proton but acts as an acid.Why?

Posted by Sourav Kumar Jha 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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At 440 degree centigrate the equilibrium constant for the following reaction Is49.5 H2+I2=2HI If 0.2M of H2 and 0.2M of I2 are placed in a 10L vessel and permitted to react at this temperature what will be the concentration of each substance at equilibrium

Posted by Ganesh Upadhyay 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Baibhav Malviya 6 years, 2 months ago

Jjhhjaga

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Which of the following has highest bond order n2 n2 plus n2 minus

Posted by Akshat Gupta 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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favourable condition for melting of sulphur high or low pressure

Posted by Aman Shree 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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What are resonance structures?why is it necessary?

Posted by Baibhav Malviya 6 years, 2 months ago

CBSE > Class 11 > Chemistry

3 answers

Somya Mehta 6 years, 2 months ago

Resonating structures hypothetical structures in which comparable energies size and compound with same properties takes part in resonance

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Aditya Narayan Singh 6 years, 2 months ago

If you don't know answer don't do this

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Lalit Choudhary 6 years, 2 months ago

Jjhhjaga

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Calculate emperical formula for C6H6

Posted by Ashwin Ramesh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Somya Mehta 6 years, 2 months ago

Empirical formula for C6 H6 is CH

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Harender Singh 6 years, 2 months ago

Emperical formula of C6H6 is CH

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What is the meant by standard ethalpy of atomisation

Posted by Sourabh Yadav 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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Derive the structure of 3-nitro hexene

Posted by Jayakumaran Geetha 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Aditya Narayan Singh 6 years, 2 months ago

In benzene add 3 NO2 alternately

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Determine the empirical formula of an oxide of iron,which has 69.9% iron and 30.1% dioxygen by mass.

Posted by Nitin Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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Write the types of isomerism show by the following pairs of compound. 1. 1,2-Dichlorocyclopentane and 1,3-Dichlorocyclopentane 2. Ethanoic acid and Methylmethanoate

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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What is Rf value? Why is it less than 1

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 2 months ago

Rf values are always less than 1. An Rf value of 1 or too close to it means that the spot and the solvent front travel close together and is therefore unreliable. This happens when the eluting solvent is too polar for the sample.

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IUPAC name for 1. CICH2CH=CHCH2I 2. CH3-CH(OH)CH(CH3)CONH3 3.(CH3) 3CCl 4.neupentane

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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What is driving force of spontaneous

Posted by Kuwar Ji Raja 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Shivam Pathak 6 years, 2 months ago

The overall tendency for a process to take place by itself is called driving fprce

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0.9031g of mixture of NaCl and KCl on treatment with H2SO4 yielded 1.0784g of mixture Na2SO4 and K2SO4. Calculate the percentage composition of mixture.

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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A sample of HCl has 20% hydrogen chloride. How many grams of this sample this sample are needed to complete react with 50g CaCO3?

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Somya Mehta 6 years, 2 months ago

First take the formula mole is equals to to given mass upon molar mass the given mass is 50 gram and the molar mass of CACO3 is hundred then the mole will be 0.5

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Name and structure of the product formed when C6H5COONa is treated with Soda lime

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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An organic compound `A` having molecular formula C7H15Br treated with alcoholic KOH give compound 'B'. B on ozonolysis gives one moles of pentan-2-one and one mole of ethanol. Identified 'A' and 'B'. Explain with suitable reaction.

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

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Calculate the percentage of nitrogen in urea (NH2CONH2)

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 2 months ago

The formula of urea is NH2CONH2
Molar mass = 60.01 g/mol
Atomic mass of N = 14 and
Number of atoms = 2
That means, 14 {tex}\times{/tex} 2= 28g/mol of urea
MW urea = 60.1
%N = 100% x 28.0 g N / 60.1 g urea = 46.66 %N
Or
%N= 28/60{tex}\times{/tex}100= 46.66 % N

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Calculate the number of Cl- and Ca2+ ions in 222g anhydrous CaCl2

Posted by Indrajeet Singh 6 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 2 months ago

The chemical formula and molar mass of calcium chloride are respectively CaCl2 and 111 g respectively. Thus, there are 6.022{tex}\times{/tex}1023 formula units in 111g of CaCl2. So,
number of formula units of CaCl2 in 111 g of CaCl2 = 6.022 {tex}\times{/tex}1023
number of formula units of CaCl2 in 1g of CaCl2 = {tex}\frac{(6.022\times1023)}{111}{/tex}

number of formula units in 222g of CaCl2 ={tex}\frac{(6.022\times1023\times222)}{111}{/tex}
= 12.044 {tex}\times{/tex} 1023
Now, each formula unit of CaCl2 contains one Ca2+ ion and two Cl- ions. Therefore
number of Ca2+ ions in one unit of CaCl2 = 1
number of Ca2+ ions in 12.044 {tex}\times{/tex} 1023 units of CaCl2 = 1 {tex}\times{/tex} 12.044 {tex}\times{/tex} 1022 = 1.2044 {tex}\times{/tex} 1024
Similarly
number of Cl- ions in one unit of CaCl2 = 2
number of Cl- ions in 12.044 {tex}\times{/tex} 1023 units of CaCl2 = 2 {tex}\times{/tex} 12.044 {tex}\times{/tex} 1023
= 2.4088 {tex}\times{/tex} 1024
Hence, there are 1.2044 {tex}\times{/tex} 1024 Ca2+ ions and 2.4088 {tex}\times{/tex} 1024 Cl- ions in 222 g of CaCl2.