CBSE > Class 11 > Chemistry | CBSE Board | Homework Help

Organic compounds mainly contains carbon and hydrogen. Hydrocarbon chain is hydrophobic or oleophilic. Polar hydrocarbons dissolve in water due to formation of hydrogen bonds with water.

As hydrocarbon part increases, solubility in water decreases due to increase in oleophilic part. Thus hydrocarbons are miscible in organic solvents.

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How to prepare for organic

Posted by Mohan Kanha 6 years ago

CBSE > Class 11 > Chemistry

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Vikas Moond 6 years ago

Watch play chemistry (IMPACT naming ) on youtube

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Sp black ke tatvon ke name

Posted by Gk Siddharth S 6 years ago

CBSE > Class 11 > Chemistry

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Saurabh Singh Rana 5 years, 11 months ago

Li-lithium Na-sodium K-pottassium Rb-Rubidium Cs-Ceasium

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what is le chaterlior principal ? example

Posted by Anisha Kumari 6 years ago

CBSE > Class 11 > Chemistry

2 answers

Tanya Chaudhary 6 years ago

A/c to this principle change in any of the factor that determine the equilibrium condition of the system will cause the system to change in such a manner so as to reduce or to counteract the effect of the change it is applicable to all physical and chemical equilibrium

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Yogita Ingle 6 years ago

Le Chatelier’s principles, also known as the equilibrium law, are used to predict the effect of some changes on a system in chemical equilibrium (such as the change in temperature or pressure). The principle is named after the French chemist Henry Louis Le Chatelier.

Le Chatelier said that equilibrium adjusts the forward and backward reactions in such a way to accept the changes affecting the equilibrium conditions.

When factors like concentration, pressure, temperature, inert gases that affect equilibrium are changed, the equilibrium will shift in that direction where the effects caused by these changes are nullified.

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Calculate the enthalpy change for the reaction H2(g) + cl2(g) =2Hcl Given: G H-H =430 Cl-Cl=242 H-Cl=427

Posted by Shivam Tiwari 6 years ago

CBSE > Class 11 > Chemistry

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Shreya Songara 5 years, 11 months ago

ΔH=(430+242)-2(427)=-182

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An oxide of Fe has formula Fe0.98 O (oxide of iron ) Determine the molar percentages of Fe(||) and Fe(|||) in the oxide.

Posted by Bishwamadhab Das 6 years ago

CBSE > Class 11 > Chemistry

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Salt analysis chart

Posted by Pallavi Malagali 6 years ago

CBSE > Class 11 > Chemistry

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temporary hardness of water is removed by boiling . asign reas one for the same

Posted by Rajesh Chahal 6 years ago

CBSE > Class 11 > Chemistry

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assign the reason for the following . 1) enthalapy of fusion of water is higher as compared to the hydrides of cogeners

Posted by Sarla Gulati 6 years ago

CBSE > Class 11 > Chemistry

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What is borex test and formula involved in it

Posted by Bhabya Chaubey 6 years ago

CBSE > Class 11 > Chemistry

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What is the nature of acetylene

Posted by Santosh Sharma 6 years ago

CBSE > Class 11 > Chemistry

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Shivangi Yadav 6 years ago

Acidic nature

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1.2 gm of mg will produce mgo equal to

Posted by Chaudhari Tanmay 6 years ago

CBSE > Class 11 > Chemistry

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Determination of strength of a given solution of NaOH by titirating it against a standard solution of oxalic acid

Posted by Aryan Nandal 6 years ago

CBSE > Class 11 > Chemistry

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What is ionization enthalaphy

Posted by Rajat Kumar 6 years ago

CBSE > Class 11 > Chemistry

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Yogita Ingle 6 years ago

The enthalpy change associated with the removal of the first electron from an isolated gaseous atom in its ground state is called first ionization enthalpy.

Ionization enthalpy depends on the following factors:

Penetration effect
Shielding effect
Electronic configuration

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How is oxygen more electronative than carbon

Posted by Ankit Kumar 6 years ago

CBSE > Class 11 > Chemistry

1 answers

Shivangi Yadav 6 years ago

Both carbon and oxygen lie in same period . We know that in going from left to right size of the atom decrease the electronegative increase

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How to gain marks 90% sir

Posted by Ali Khan 6 years ago

CBSE > Class 11 > Chemistry

4 answers

Chaudhari Tanmay 6 years ago

Do hardwork,not wish directly a fruits of anything

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Shivangi Yadav 6 years ago

Focus on study not in marks because if you study then automatically you will get good marks not 90% you can score 99%.

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Shivangi Kumari 6 years ago

Hard work with smart work

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Jay Kabdwal 6 years ago

Pd le abhi time ha

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Where are the answer of practice paper questions

Posted by Muskan Sheikh 6 years ago

CBSE > Class 11 > Chemistry

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@Ashish×_× Sahu 6 years ago

In Google

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What is lassaigne's test?

Posted by Dhruv Dhar 6 years ago

CBSE > Class 11 > Chemistry

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Yogita Ingle 6 years ago

Nitrogen, sulphur, halogens and phosphorus present in an organic compound are detected by Lassaignes test. The elements present in the compound are converted from covalent form to ionic form by fusing the compound with sodium metal.

Na + C + N {tex}\xrightarrow{Heat}{/tex} NaH

2Na + S {tex}\xrightarrow{Heat}{/tex} Na₂S

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Predict in which of the following entropy decreases/ increase 1) a liquid crystallizes into a solid 2) h2( g) = 2h( g)

Posted by Sarita Devi Devi 6 years ago

CBSE > Class 11 > Chemistry

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Esha Dutt 6 years ago

When a liquid crystallizes into a solid then the molecules tend to arrange in an orderly manner so entropy(i.e. randomness) decreases

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How will you seperate the constituents of a sample of gun powder?

Posted by Rohit Singh Bhardwaj 6 years ago

CBSE > Class 11 > Chemistry

2 answers

Chirag Chirag 6 years ago

Sulphur, charcoal and potassium nitrate are the constituents of gunpowder. These can be separated as follows: Step 1: Dissolve the gunpowder in water. Only potassium nitrate will dissolve. Step2: Filter the solution. Filterate is the solution of potassium nitrate and residue contains sulphur and charcoal. Step3: Evaporate the filterate to vapourize water. Potassium nitrate will be left behind and is thus separated. Step4: Dissolve the residue in carbondisulphide which will dissolve sulphur but not charcoal. Filter the solution. Step5: Charcoal is separated as the residue. Step6: Evaporate the filterate to vapourize carbondisulphide. Crystals of sulphur are left behind.

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Chirag Chirag 6 years ago

Water (H2O) needs to be added and then filtered to get the nitre (KNO3). The filtrate is nitre (KNO3). Then again the residue is dissolved in carbon disulphide (CS2) where sulphur (S) gets dissolved . By filtration we will get the sulphur(S) and Charcoal (C7H4O) as residue

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2,3-diethylphenol

Posted by Sarthak Sehgal 6 years ago

CBSE > Class 11 > Chemistry

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Help me in titration

Posted by Helen Samitha 6 years ago

CBSE > Class 11 > Chemistry

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Would you expect the hydrides of N,O and F to have lower boiling points than the hydrides of their subsequent group members ? Give reasons

Posted by Aarti Gupta 6 years ago

CBSE > Class 11 > Chemistry

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Polar covalent bond??

Posted by Nisha Yadav 6 years ago

CBSE > Class 11 > Chemistry

3 answers

Pragya Maurya 6 years ago

Gud yogita

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Vivek Thakur 6 years ago

It is the bond formed b/w heteroatomic(different)molecules of diff electronegativity*. Charge shifts to more e-ve* element and +ve charge to less e-ve* Thus, positive and negative poles r produced and bond become completely polar bond.

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Yogita Ingle 6 years ago

Polar covalent bonding is a type of chemical bond where a pair of electrons is unequally shared between two atoms.
Example: Hydrogen chloride (HCl) molecule.
The bonding of hydrogen and chlorine atoms leans more towards Cl atom because Cl is more electronegative in nature than the hydrogen. Thus the shared pair of electrons lies not exactly in between the bond but lean towards chlorine. Due to this Cl atom acquire a slight negative charge, and H atom acquire slight positive charge.

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What is london forces

Posted by Nisha Yadav 6 years ago

CBSE > Class 11 > Chemistry