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Hw to deal with physical chem its breakin my head??

Posted by Anusha .. 7 years, 2 months ago

CBSE > Class 12 > Chemistry

4 answers

Rohan Kumar 7 years, 2 months ago

What a dialogue Megha......?

0Thank You

Ayush Parija 7 years, 2 months ago

My favourite section .understand and pratice the numericals dont blindly mug up the formula

1Thank You

G K 7 years, 2 months ago

.....?By doing so much questions?.....so that physical chemistry kudh aake aapko bola ki yrr chod de mujhe...?...organic or inorganic bhi h usse padhle plzzz.....??....??

3Thank You

Surbhi Manocha 7 years, 2 months ago

Just by focus dear , dont lose hope .....

1Thank You

ANSWER

What is electrolytes

Posted by Vishal Sahu 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Rohan Kumar 7 years, 2 months ago

Ry8

0Thank You

Princesses Kaur 7 years, 2 months ago

Positive and negative ion in any soln

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Bohrs model

Posted by Ankit Sandhu 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Structure of o3

Posted by Anjali Raturi 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Kamakshi Dixit 7 years, 2 months ago

O single bond o double bond o It is bent

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What is zeolite?

Posted by Gufran Khan 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Karishma Grewal 7 years, 2 months ago

It is a type of shape selective catalysis It is a comb like structure of aluminasilicat in which silicon atom replace by alluminium atom/ion

2Thank You

ANSWER

Neopentyl alcohol react with concern. HBr to give 2 bromo-2methyl butane. Write the mechanism for the formation of the product

Posted by Gufran Khan 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Princesses Kaur 7 years, 2 months ago

Padukon ????

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What happen when an electrolyte say Nacl is added to ferric hydroxide sol????

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Mohit Sepat 7 years, 2 months ago

Kisi ko kuch aata bhi h ya nhi

1Thank You

ANSWER

The rate constant for first order reaction is 60.5sec inverse. How much time will it take to reduce the initial concentration of reactant to 1/16th value? Solve this problem.... ???

Posted by Gufran Khan 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

We Ayush 7 years, 2 months ago

Time taken is equal to four times t1/2 t1/2 is equal to 0.693/k

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ANSWER

What is observed when a beam of light is passed through sol ???

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Karishma Grewal 7 years, 2 months ago

Tyndall efect

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What is observed when electric current is passed through sol????

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Karishma Grewal 7 years, 2 months ago

Eletrophorsis

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How the phenomenon of adsorption help in the production of vaccum????

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is lucas regent ?

Posted by Max Bps 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Thejaswini Chirnalli Mattad 7 years, 2 months ago

A mixture of concentrated HCl and anhydrous zncl is called Lucas reagent

1Thank You

We Ayush 7 years, 2 months ago

Equimolar mixture of conc hcl and anhydrous zncl2.use in distinction of primary secondary annd tertiary alcohol

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What is mechanisms for preparations of grignard reagent

Posted by Kajal Chauhan 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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Benzene mein meta position p resonance kyon nhi lagata Can anyone explain me please??

Posted by Hitesh Sharma 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Hitesh Sharma 7 years, 2 months ago

Can u explain me

0Thank You

Max Bps 7 years, 2 months ago

By the charge density

1Thank You

ANSWER

Write the chemical reaction folloing dry cell

Posted by Pradyum Sah 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Pradyum Sah 7 years, 2 months ago

Dry cell

1Thank You

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Why and what happen when we place the blood cell in water (hypotonic solution )???

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Surbhi Manocha 7 years, 2 months ago

Water will enter into the blood cell , due to which cell will burst as osmosis takes place.

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ANSWER

Why a solution of chloroform and acetone show negative deviation from Raoults law???

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What happens if external potential applies becomes greater than Enot cell of electrochemical cell???

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjana Sherawat 7 years, 2 months ago

It will change into electrolytic cell because now work is done by electricity to continue the reaction

1Thank You

ANSWER

Two 5 molal solution are prepared by dissolving a non electrolyte,non volatile solute separately in the solvents X and Y. The molecular weights of solvents are Mx and My where Mx=(3÷4)My. The relative lowering of vapour pressure of the solution in X is 'm' times that of solution in Y. Given that number of moles of solute is very small in comparison to that of solvent. Then value of 'm' is ?

Posted by Aanchal Jain 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

We Ayush 7 years, 2 months ago

We know that po _ps/po is equal to mole fraction of solute. For molality direct formula is there that is po_ps/ps into 1000/molecular weight of solvent equal to molality

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Why does the cell potential of Hg cell remain constant throughout its life ???

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Mohit Sepat 7 years, 2 months ago

Thanku

0Thank You

Yogita Ingle 7 years, 2 months ago

The cell potential of Hg cell remain constant through its life this is because the overall cell reaction does not involve any ion in the solution whose concentration changes during its life time and the electrolyte KOH is not consumed in the reaction.

0Thank You

Anjana Sherawat 7 years, 2 months ago

Ions don't take part in its cell reaction so potential doesn't change

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ANSWER

Why the block of Mg are straped to the steel hubs of ocean going ships????

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 2 months ago

All metals in salt water tend to rust/anodize/oxidise rather rapidly. However, each metal has a different susceptibility to oxidation. When two metals are in contact with each other in sea water, a galvanic cell is created, which basically results in the transfer of electrons from one metal to the other. The result of the electron transfer is the prevention/slowing of oxidation (oxidation = loss of electrons). In this case, the magnesium transfers electrons to the iron and so the iron effectively rusts more slowly. The magnesium on the other hand, acting as a "sacrificial anode" anodises very quickly.

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ANSWER

Why the rusting of iron is quicker in saline water than in ordinary water???

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 2 months ago

Salt water does make iron nails rust faster than non-salted water, because when salt is added to water, it will rust the top layer of the iron nail, and then make the iron nail basically shed its top layer. Then the salt will rust that layer, and this process continues until the whole iron nail is rusted. Normal water can only really rust the top layer, and can't get to the rest of the iron nail.

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What is the Role of desorption in catalysis ????

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 7 years, 2 months ago

Desorption is a phenomenon where a substance is released from or through the surface.,It is opposite of sorption process..Catalyst can be any chemical entity which helps in increasing the rate of reaction ,but they donot itself take part in reaction i.e they just support the chemical reaction to occur effectively.For catylytic action, the reactants gets adsorbed on the surface of the catalyst & gets converted into the product after the specified procedure.The product or the unreacted reactat has to be removed from the surface of catalyst,at this point the desorption process comes into the picture.desorption helps in removal of the reactant & product form the surface of catalyst & makes its free for the next reaction.

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Anjana Sherawat 7 years, 2 months ago

Beacause of desorption the product formed is removed from the catalyst surface and it becomes free for further reaction

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What is zeta potential ???

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 2 months ago

Zeta potential: when one type of the ions of the electrolyte are adsorbed on the surface of colloidal particles it forms a “Fixed layer”. It attracts the opposite ions to form another layer called “diffused layer”. The double layer of opposite charge thus formed is called Helmholtz electrical double layer. As a result, a difference of potential exists between the fixed layer and the diffused layer. This potential difference is known as electro kinetic or zeta potential.

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Out of Bacl2 and Kcl which is more effective in causing cogulation of negatively charged sol ??give reason ????

Posted by Mohit Sepat 7 years, 2 months ago

CBSE > Class 12 > Chemistry