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

Magnesium do not impart colour to the Bunsen flame because their atoms are comparatively smaller and the valance electrons are strongly attached to the nucleus. Therefore their ionisation energies are high, so they need large amount of energy for the excitation of their valence electrons to higher energy level which is usually not available in the Bunsen flame. So they do not impart any colour to the flame.

1Thank You

ANSWER

What is antimarkoni koffs rule

Posted by Ayush Gupta 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Keerthu Raghu 6 years, 10 months ago

When HBr gets added to an unsymmetrical alkene in the presence of peroxide then, the negative part of the addendum gets attached to the carbon containing more number of hydrogen atoms(in opposite to the markovnikov's rule)

0Thank You

ANSWER

What is the law called which deals with the ratios of the volume of the gaseous reactants and products under similar conditions of temperature and pressure?

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Why are the atomic masses of most of the elements fractional?

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Veena Singh☺️? 6 years, 10 months ago

Due to isotopes

2Thank You

ANSWER

Give chemical equation to show the reaction between silica is treated with hydrogen fluoride.

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Give chemical equation to show the reaction between Borontrifluoride with sodium hydride.

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Veena Singh☺️? 6 years, 10 months ago

2 BF3 + 6NaH ---------> B2H6 + 6NaF

0Thank You

ANSWER

Write balanced equation for boric acid is added to water.

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Veena Singh☺️? 6 years, 10 months ago

H3BO3 + 2 HOH -----> B(OH)4 + H3O

0Thank You

ANSWER

Write balanced equation for Dimethyldichlorisilane is hydrolysed followed by condensation polymerisation.

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Carbon-Oxygen bond lengths are equal in carbonate ion. Explain

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Guys i have only one day for preparation of chem exam rather nervous kaise hoga tension .

Posted by Kriti Sharma 6 years, 10 months ago

CBSE > Class 11 > Chemistry

3 answers

Kriti Sharma 6 years, 10 months ago

It was nice akash

0Thank You

Aman Kumar 6 years, 10 months ago

Listen...kriti ....inspite of thinking that u have less time....focus on the max. time that is remaining with you....make ur concept clear and if u have less time than don't do hard work ...just do smart work...prepare ...nice for those topic whom u feel will have the max. Chances of coming in exam........And at last...be calm...and give ur best....

3Thank You

Kriti Sharma 6 years, 10 months ago

Guys answer

0Thank You

ANSWER

Though the electronegativities of nitrogen and chlorine are same.However NH3 exist as liquid whereas HCl as gas.explain

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Oxygen has lower first ionization enthalpy than nitrogen and fluorine.give reason

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Kumar 6 years, 10 months ago

Because oxygen has 4 electrons in it's 2p orbital and it would prefer to loose one electron to attain half-filled configuration which is a stable form. That's why it has lower first ionization enthalpy than N and F.??

0Thank You

ANSWER

Oxygen has less negative electron gain enthalpy than sulphur.give reason

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

The density of 3 molal solution of NaOH is 1.110g/mL. calculate the molarity of the solution. At mass of Na=23.O=16and H=1g/mol.

Posted by Shruti Nain 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

General Electronic Configurations of s-block,p-block,d-block&f-block elements

Posted by Guru Praneeth 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Arun Kumar 6 years, 10 months ago

S-block= ns^1-2 P-block= ns^1-2 np^1-6 D-block= (n-1)d^1-10 ns^0-2 F-bolck= (n-2)f^0-14 (n-1)d^0-2 ns^2

0Thank You

ANSWER

Ionic product

Posted by Satender Kumar Yadav 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Guys share your strategy for chemistry exam preparation.

Posted by Kriti Sharma 6 years, 10 months ago

CBSE > Class 11 > Chemistry

3 answers

Kriti Sharma 6 years, 10 months ago

Sanidhya your papers are over send me some English Paper questions dude.

0Thank You

Kriti Sharma 6 years, 10 months ago

Thanks Sanidhya

0Thank You

Sanidhya Jadaun? 6 years, 10 months ago

Just clear all the questions of s- block,p-block,organic chemistry, hydrocarbon from ncert solutions because in my exam many questions came from these chapters........so before exam dont forget to have a look on these chapters........because these chapters may create a huge difference........?

3Thank You

ANSWER

Define physical equillibrium

Posted by Lucky Baghela 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Compare the H-N-H bond angle in NH3; NH4 +; NH2-

Posted by Dinesh Soni 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Shreya Dixit 6 years, 10 months ago

Increasing order NH4, NH3,NH2

1Thank You

ANSWER

Using s,p,d,f notation, describe the orbital with the following quantum numbers n=2,n=1

Posted by Anand Giri 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What is uncertain in the uncertainity principle

Posted by Manju Srivastava 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

For those whose Physics paper was today I want to ask how was your paper was it good bad I don't expect it to be bad but I'm asking it fairly as a opposite of good ok what's the preparation for next paper now

Posted by Kriti Sharma 6 years, 10 months ago

CBSE > Class 11 > Chemistry

3 answers

Shruti Nain 6 years, 10 months ago

It was a very bad paper according to me

1Thank You

Sanidhya Jadaun? 6 years, 10 months ago

Yesssss........?????

1Thank You

Kriti Sharma 6 years, 10 months ago

Hy dued it was not that much difficult questions were of great standard but ya i did it well .i am having my chem exam now .what about you having fun now aftr your last exam.

1Thank You

ANSWER

What is Zeemat effect

Posted by Shilpa Majhi 5 years, 8 months ago

CBSE > Class 11 > Chemistry

2 answers

Muskan Khan 6 years, 10 months ago

Splitting of spectral lines in presenceof magnetic field.

1Thank You

Sukhveer Singh 6 years, 10 months ago

Looda lesson

0Thank You

ANSWER

What is Le chateleir's principle

Posted by Varchasv Gaming 6 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Muskan Khan 6 years, 10 months ago

If there is any change in the factor that determines the equilibrium of a chemical reaction then the equilibrium will be shifted in that direction so as to reduce or to counteract the effect of change.

0Thank You

Yogita Ingle 6 years, 10 months ago

Le-Chatelier’s Principle or more commonly known as the “Equilibrium Law” is one of the most important laws that help us to understand qualitatively, how the equilibrium reacts to any change that it encounters.

Le-Chatelier’s Principle states that “Once a dynamic equilibrium has been established, any change brought about in the conditions will be compensated by a balance shift so as to counter the original change.”

2Thank You

ANSWER

what is comonigetion

Posted by Pushkar Pandey 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What is meant by standard electrode potential

Posted by Sameer Mohamed 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 10 months ago

A potential difference develops between the electrode and the electrolyte which is called electrode potential.
When the concentrations of all the species involved in a half-cell is unity (concentration is 1M ) and temperature is 298 K, the electrode potential is known as standard electrode potential.

1Thank You

ANSWER

Ideal gas eq derivation states of matter

Posted by Isha Kukreja 6 years, 10 months ago

CBSE > Class 11 > Chemistry