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What is salt bridge

Posted by Shivam Kumar 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 8 years, 1 month ago

used for stability in 2 diff. Sol. where one work as anode and other work as cathode

ANSWER

What is normality?

Posted by Issar Rishu 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 8 years, 1 month ago

no. of gram eq. of solute diss. per L of Sol.

ANSWER

Why Pb2+ is kept in 1st as well as in 2nd group ?

Posted by Gajendra Chouksey 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Threshold energy

Posted by Mohit Bisht 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Peptization

Posted by Pradhyumn Kushwaha 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Radhika Tyagi 8 years, 1 month ago

Process of conversion of freshly prepared ppt into a colloidal sol by adding a suitable electrolyte

Pankaj Sihag 8 years, 1 month ago

Process of converting precipitate into colloidal solution

ANSWER

Give a mechanism of preparation of ethyl alcohol from ethene by acid catalysed hydration

Posted by Vikas Dhiman 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

I am very much scared of chemistry though I need to score handsome marks. Please give me some suggestions for what can I do in these remaining days.

Posted by Nk Sharma 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Mahima Kumari 8 years, 1 month ago

What ever you had studied keep on revising them instead of attaining any new topics I m 100%sure u will score handsome mark

ANSWER

What are grp 12-16 elements called?

Posted by Akash Rathod 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 8 years, 1 month ago

p-block elements

ANSWER

2018 cbse question paper for practice

Posted by Anuj X 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why transition metals have variable Valencies and oxidation states

Posted by Sameet Singh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Jin Kazama 8 years, 1 month ago

due to less energy gap b/w p and d block , p block electron also take part in oxi.

Devansh Patel 8 years, 1 month ago

Due to unpaired electro in d orbital.

Decent Sharma 8 years, 1 month ago

Due to comparable energy energy of s and d orbital

ANSWER

Why we use potash alum in blood cloting

Posted by N J 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Vedant Salphale 8 years, 1 month ago

Because it has good coagulating power

ANSWER

define F centre

Posted by Sakshi Malik 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Nikita Mishra 8 years, 1 month ago

F centre are anionic vacancies occupying electron, they provide colour to the crystal

ANSWER

(CH3)3-c-CHO does not undergo aldol condensation.comment.

Posted by Kajal Kumari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Abcd Abcd 8 years, 1 month ago

Due to absence of alpha hydrogen

ANSWER

Cumene is better starting substance for the preparation of phenol.explain.

Posted by Kajal Kumari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Nikita Mishra 8 years, 1 month ago

Bcz during formation of phenol by cumene acetone is produced which is again an imp organic compund

Kajal Bhardwaj 8 years, 1 month ago

But why it is better

Chinmay Nanda 8 years, 1 month ago

Cumene is also known as isopropyl benzene and when this undergoes reaction with oxygen to form phenol

ANSWER

O-nitrophenol is more acidic than orthomethoxy phenol.explain.

Posted by Kajal Kumari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Chinmay Nanda 8 years, 1 month ago

Nitro group is electron withdrawing group and for which o-nitrophenol is more acidic group due to negative inductive effect

Preeti Kranti 8 years, 1 month ago

I mean less acidic

Preeti Kranti 8 years, 1 month ago

Nitro group is electron withdrawing group therefore it decreases the electron density on oxygen atom of phenol group and makes O-H bond more polar hence makes the release of H+ ion easier.Whereas methoxy group is electron donating group which increases the polarity of O-H and makes it less polar

Nimisha Varshney 8 years, 1 month ago

Because it is more stable

ANSWER

Alcohols are more soluble in water than hydrocarbon. Explain.

Posted by Kajal Kumari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Sajal Joshi 8 years, 1 month ago

Because of intermolecular H bond

ANSWER

Why the surface area of alcohol increase when it is branched

Posted by Monoswita Mitra 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is important in biomolecules

Posted by Ishu Chouhan 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Anshika Singh 8 years, 1 month ago

Structures of different molecules and function of vitamins n proteins

Abcd Abcd 8 years, 1 month ago

Definitions and examples of each topic

ANSWER

Why is hdrated ferric oxide collide becomes charged when prepared by adding a fecl3 to NaOH.?

Posted by Ayushi Tiwari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Ayushi Tiwari 8 years, 1 month ago

Only it's hydrated***

Ayushi Tiwari 8 years, 1 month ago

Smjh nhi aa rha to wrong nhi bol sakti h aap

Ayushi Tiwari 8 years, 1 month ago

It's right *

Radhika Tyagi 8 years, 1 month ago

Improve ur English n type properly

ANSWER

CHBrCHBr react with NaI in the presence of acetone to give

Posted by So Nu Kapoor 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Archi Singh 8 years, 1 month ago

CHI-CHI

ANSWER

What is the role of sulphur in vulconisation?

Posted by Kajal Kumari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Abcd Abcd 8 years, 1 month ago

It makes it stiff

Jin Kazama 8 years, 1 month ago

it form linear structure of rubber into branched and improve its property

ANSWER

Chemistry chapters according to marks that comes in examination

Posted by Shubham Sharma 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 8 years, 1 month ago

physical chem. = 23 inorganic = 19 organic and bio = 28

ANSWER

Write formula. Iron(lll)he a cyan overrate(ll) kese likhenge

Posted by Lalit Sh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

why glass is consider as supercooled liquide

Posted by Yasir Arafat 8 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Ravi Kumar 8 years, 1 month ago

Because it has a tendency to flow You can see in summer that the window mirror is. Thin from center and from bottom it is thick.

Chinmay Nanda 8 years, 1 month ago

Glass is considered as a supercooled liquid because it has fluidity property

Jin Kazama 8 years, 1 month ago

less fluidity and high viscosity

Hritik Handa 8 years, 1 month ago

because it has property of fluidity after a long while.

ANSWER

The density of copper metal is 8.95g/cm3.If the radius of copper atom be 127.8pm.Is the copper unit cell simple cubic,bcc or FCC?

Posted by Aditi Kashav 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Draw the graph solution showing positive and negative devation

Posted by Prashant Singh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Ayushi Tiwari 8 years, 1 month ago

Chap . solution pg 46

Ayushi Tiwari 8 years, 1 month ago

Ncert book kholo mil jaayega ..

ANSWER

Pls koi aldehyde vala chapter learn karne ka tarika batao .. Bas ye ek chapter mujhse prepare nhi ho RHA ..help

Posted by Drishtee Gupta 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Chinmay Nanda 8 years, 1 month ago

Watch lectures

ANSWER

Zn²+ is heated they give yellow color ? Why ??

Posted by Rohit Nandan 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Prabhjot Guraya 8 years, 1 month ago

Due to f centre or farbin centre

Prashant Singh 8 years, 1 month ago

Due to the Fcenter

ANSWER

Rochle salt is ?

Posted by Aditya Tiwari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Ayushi Tiwari 8 years, 1 month ago

Potassium sodium tartrate tetrahydrate and also double salt of tartaric acid. Formula -KNaC4H4O6.4H2O

.Ismat .Jamil 8 years, 1 month ago

Fehling's solution B

Preeti Kranti 8 years, 1 month ago

Sodium potassium tartarate

ANSWER

How to convert n propyl alcohol to hexane with mechanism

Posted by Shikha Rai 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Prabhjot Guraya 8 years, 1 month ago

By ading reagent you want

Rahul Poonia 8 years, 1 month ago

Firstly alcohol ko haloalkane me change kro aage wurtz reaction se hexane mil jayega

ANSWER

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