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ANSWER

How to prove that light ( electron) shows both particle and wave nature experimentally???

Posted by Prakhar J 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Rishabh Rathi 6 years, 11 months ago

First of all light is photon different from electron, its wave nature can we shown by double slit experiment and reflection of light shows its particle property.

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Please provide best and understandable notes of organic chemistry class 11 ... Actually I needed it... Because I have not any kind of help for organic.... So please effective notes....

Posted by Shivangi Bhardwaj 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How do u solve this mathematical equation in chemistry?

<font size="1">X²</font>+ 1.6*10^-2x - 1.6*10^-2= 0

Posted by Parvathy Mahadev 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Why Beryllium is not considered as alkaline Earthmetal?

Posted by Rohan Pant 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar J 6 years, 11 months ago

Because it shows anomalous behaviour........due to this it won't be considered...

ANSWER

What are polyfunctional group??

Posted by Tripti Shah 6 years, 11 months ago

CBSE > Class 11 > Chemistry

4 answers

Vinay Gautam 6 years, 11 months ago

Two or more functional groups

Ayushi Ayushi 6 years, 11 months ago

In That example C=O

Ayushi Ayushi 6 years, 11 months ago

Organic compounds that contain two or more functional groups are called polyfunctional compounds. For example O || CH3- C-CH2-COOH

Anshuman? Raj? 6 years, 11 months ago

More than one functional group.

ANSWER

What is the size of ionic radius in period???

Posted by Tripti Shah 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Anshuman? Raj? 6 years, 11 months ago

Values of ionic radius are difficult to obtain and tend to depend on the method used to measure the size of ion. A typical value fir an ionic radius would be from 30 pm (0.3 °A) to 200 pm ( 0.2 °A)

ANSWER

Why is carbon make a long chain of organic copaund

Posted by Tripti Shah 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Akanksha Kumari? 6 years, 11 months ago

Due to having high canetation tendancy

4Thank You

Vinay Gautam 6 years, 11 months ago

To complete its valency

4Thank You

ANSWER

What is Rasonance?

Posted by Jatin Verma 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Tripti Shah 6 years, 11 months ago

When a molecule cannot be represented by a single structure then various structures of nearly similar energy , similar position of atoms and same bonding and lone pair electrons are written, these are known as resonance structures and their mixed form is called resonance hybrid. Which confirms the actuaal structure and this concept is called resonance

ANSWER

What is pyrolysis?

Posted by Ardra Vs 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar J 6 years, 11 months ago

decomposition of organic material in the presence of superheated water or steam (hydrous pyrolysis) is called pyrolysis. for example, in the steam cracking of oil. ...

ANSWER

Hos to calculate molarity and molality?

Posted by Phiba Diengdoh 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Vinay Gautam 6 years, 11 months ago

Molarity=mass of solute/molecular mass of solute*1000/vol. Of solution. Molality=mass of solute/molecular mass of solute*1000/mass of solvent

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

Right Lily

Lily ☺ 6 years, 11 months ago

Molarity=n/v. Molarity=weight÷(molecular weight×volume in litres). Molality=(weight of solute ×1000) ÷(molecular weight×weight of solvent).

ANSWER

Why is potassium lighter than sodium

Posted by Amrita Srisaahiti Kondapalli 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Anuj Maurya 6 years, 11 months ago

The increase in shell size outweighs the pull of the core on the outer shell electron. So K is lighter than Na.

ANSWER

Calculate w,q&∆u when 2 mole of idal gas expands isothermally & reversibly at 273k for a volume of 10lt and 20 lt

Posted by Anchu Khurana 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Mahendra Singh 6 years, 11 months ago

W=-2.303nrtlogv2/v1 W=-2.303×2×8.314×273×log20/10 W=-3147.06J U=q+w For isothermally u=0 0=q+(-3147.06) q=3147.06J

ANSWER

0.4gram of an organic compound in dumas method of estimation of nitrogen gives 50ml of nitrogen collected at 300kelvin temperature and 745mmhg pressure. Calculate the percentage composition of nitrogen in the compound. Aqueous tension at 300kelvin in 15mmhg.

Posted by Sucheta Mohapatra 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

When benzene is used and when phenol is used❓

Posted by Shreya Raj 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Prakhar J 6 years, 11 months ago

In easy way benzene is a closed ring having molecular formula C6H6 but if we replace one hydrogen of benzene with --OH group then we can say its iupac name as benzen-1-ol or simply " Phenol" .Phenol will have molecular formula as C6H6O

Lavanya ❤️? 6 years, 11 months ago

Phenyl name is used when you can no longer use Benzene as a parent name in IUPAC system of naming and it must be used as a substituent.

ANSWER

Graph between ideal gas and real gas on the basis of boyles and charles law

Posted by Annu Sheraya 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Why are pentahelids are more covlent then trihelids ?

Posted by Abhishek Yadav 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is plaster of Paris?

Posted by Ishita Kumari 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Akanksha Kumari? 6 years, 11 months ago

Plaster of Paris is a white coloured substance which which is actually hemihydrated calcium sulfate made up of gypsum. It becomes hard when become moist and used for purposes like making status,artifacts and for plastering broken parts of bones

Vinay Gautam 6 years, 11 months ago

What a question amazing

Lavanya ❤️? 6 years, 11 months ago

a white powdery slightly hydrated calcium sulfate CaSO4·¹/₂H2O that is made by calcining gypsum, forms a quick-setting paste with water, and is used in surgical bandages.

ANSWER

Iss qualitative analysis removed from organic chemistry or instead of that group 15 is added?? Plz tell...

Posted by Shivangi Bhardwaj 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Shivangi Bhardwaj 6 years, 11 months ago

Are you 100% sure about this??

Simran Kalra 6 years, 11 months ago

yes

Raman Kant 6 years, 11 months ago

Yes 15 gp is added but no idea of organic chemistry stuff

ANSWER

Discuss the similarities and disimilarities between 1s and 2s orbitals?

Posted by Raghujeet Singh 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Rishabh Rathi 6 years, 11 months ago

Difference- Energy level, distance from nucleus and angular node Similarities - No nodal planes, shape

ANSWER

Electrofile

Posted by Ankit Chand 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Prakhar J 6 years, 11 months ago

Electrophile are the ions or compund which have postive charge or the tendency to gain electrons ( electron deficient ) . Therefore we can say that electrophile are the ones which love electrons. Eg. H+, Na+,Mg2+ , BF3, AlCl3. Since AlCl3 and BF3 doesnot have + ve charge yet they are electrophile because they are electron deficient (they will attract electron) ........

Lily ☺ 6 years, 11 months ago

Electophilic means electron loving species.

Rishabh Rathi 6 years, 11 months ago

Species which preferencially attack on electrons are electrophile

ANSWER

whose boling point is more in b/w ch4 and cf4 . explain

Posted by Gagan Gill 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What is the functional group of an aldehyde

Posted by Joban Preet 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Lily ☺ 6 years, 11 months ago

-CHO is a functional group for aldehyde. Formyl is prefix. al is suffix.

Shreya Raj 6 years, 11 months ago

Formyl or oxo

ANSWER

Structure of 1,1_ Dichloro ethene

Posted by Vivek Sharma 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Simran Kalra 6 years, 11 months ago

its impossible to draw structure in this app . just search the intermet

Vivek Sharma 6 years, 11 months ago

Structure of Acctone

ANSWER

The d block has 8 columns because a maximum of 8 electrons can occupy all the orbitals in a d subshell

Posted by Shraddha Tandon 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Rishabh Rathi 6 years, 11 months ago

Actually it has 10 column aka groups.

ANSWER

Neutron was discovered by whom ?

Posted by Vangaveeti Keshav 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 11 months ago

In the year 1932, James Chadwick discovered neutrons, another subatomic particle. He bombarded a thin sheet of beryllium by α-particles and found that electrically neutral particles with a mass slightly greater than that of the proton were being emitted. Chadwick called these particles as neutrons.

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What is the difference between nascent hydrogen and atomic hydrogen

Posted by Shakti Rathore 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 11 months ago

Atomic hydrogen: Atomic hydrogen is extremely reactive, being more reactive than ordinary, nascent, or adsorbed oxygen. When it is passed over metals or non-metals, it forms hydrides at normal temperatures, excepting for nitrogen, to which it does not react. Atomic hydrogen is an extremely powerful reducing agent, reducing oxides chlorides and sulphides of some metals like Ag, Hg, Cu etc. to metals at ordinary temperature.
Nascent Hydrogen: The hydrogen gas, which is just liberated as a result of a chemical is called nascent hydrogen or newly born hydrogen. It is obtained by passing dihydrogen gas at atmospheric pressure through an electric arc between two tungsten rods. The electric arc maintains a temperature around 4000 - 4500°C. As the molecules of dihydrogen gas pass through the electric arc, these absorb energy and get dissociated into atoms as nascent hydrogen. It is more reactive than ordinary hydrogen and its colour is not discharged. (pink in colour). For example, if ordinary hydrogen is passed through acidified KMnO₄ it does not get decolourised. However, if zinc pieces are added to the same solution, bubbles of hydrogen rise up through the solution and the colour is discharged due to the reduction of KMnO₄ by nascent hydrogen.