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

Ask questions which are clear, concise and easy to understand.

Ask Question

Why hf is more acidic as compared of nh4

Posted by Avneet Kaur 7 years, 2 months ago

1 answers

Becoz F us more electronegetive element then N as it breaks the bond and relase H+ very fastly in aqueous medium as compared to N

2Thank You

ANSWER

What is dielectric.and why water is universal polar solvent?.

Posted by Ankit Aryan Shivan 7 years, 2 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What is the difrence between inductive and electromeric effect...??

Posted by Ankit Rathore 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 7 years, 2 months ago

Inductive effect - This is effect of electronegativity, transmitted through intermediate sigma bonds. For example, chloroacetic acid is stronger than acetic acid, because the electron pulling effect of Cl stabilises the accumulation of negative charge on the anion.

Electromeric effect can be defined as the transfer of electrons from a double bond or an atom with a lone pair of electrons to an adjacent single bond.When the inductive effect and the electromeric effect operate in the same molecule, electromeric effect dominates the inductive effect.
Inductive effect produced due to the pulling of electron towards different atoms.

3Thank You

ANSWER

Ncert question papers

Posted by Siddharth Sj 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Priya Dharshini ☺☺ 7 years, 2 months ago

In this app u get it otherwise google it

0Thank You

ANSWER

What is numerical What is displacement

Posted by Abdullah Lakhawala 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Abdullah Lakhawala 7 years, 2 months ago

56 Yi

1Thank You

ANSWER

Explain how boiling point is related to its vapour pressure?

Posted by Ayush Singh 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Chesta Pawan Manchanda 7 years, 2 months ago

Boiling point is a temperature from which vapour pressure of liquid turns into atmospheric pressure . More of vapour pressure leads to less boiling point and more of boiling point leads to less vapour pressure . Through this statement we can say that they are related to each other.

0Thank You

ANSWER

What is the effect of increasing temperature on surface tension?

Posted by Ayush Singh 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Shivshant Upadhyay 7 years, 2 months ago

Decrease in surface tension.

2Thank You

ANSWER

Explain the term hybridisation breifly?

Posted by Gilchrish Khuraijam 7 years, 2 months ago

CBSE > Class 11 > Chemistry

3 answers

Madhu Madhu 7 years, 2 months ago

Yes

0Thank You

Ujjwal Tiwari 7 years, 2 months ago

intermixing of different energy orbital and make another orbital of same energy.

3Thank You

Shivshant Upadhyay 7 years, 2 months ago

Hybridisation is the intermixing of two or more hybrid orbitals .

3Thank You

ANSWER

Anybody from gkp up

Posted by Pranav Singh 7 years, 2 months ago

CBSE > Class 11 > Chemistry

4 answers

Pranav Singh 7 years, 2 months ago

Good supriya shukla jii

1Thank You

Supriya Shukla 7 years, 2 months ago

Mee?

1Thank You

Pranav Singh 7 years, 2 months ago

Gorakhpur Uttar pradesh

1Thank You

Sannu Verma 7 years, 2 months ago

Kta matlab

0Thank You

ANSWER

Why sigma bond is stronger than pi bond?

Posted by Ayush Singh 7 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Shivshant Upadhyay 7 years, 2 months ago

Pie bond is weaker bond because there is head to head overlapping takes place

2Thank You

Kevin Purwar 7 years, 2 months ago

Sigma bond is stronger than Pi want because there is less overlapping due to Parallel combination of pi bonds

2Thank You

ANSWER

Why lithium and magnesium show diagonal relationship

Posted by Laksh Chauhan 7 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Yogita Ingle 7 years, 2 months ago

The similarity between Li and Mg is because of their similar atomic radii (Li = 152 pm; Mg = 160 pm) and ionic radii. (Li⁺ = 76 pm, Mg²⁺ = 72 pm).
These two elements resemble each other in the following properties:
(i) Both Li and Mg decompose water very slowly with the liberation of hydrogen.
(ii) Both Li and Mg form nitrides - Li directly and Mg on burning in nitrogen.
(iii) LiOH and Mg(OH)₂ are weak bases.
(iv) Nitrates of both decompose on heating to give oxides.

2Thank You

Shivshant Upadhyay 7 years, 2 months ago

Because there property are match with each other.

2Thank You

ANSWER

Why ethanol soluble in water

Posted by Laksh Chauhan 7 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Yogita Ingle 7 years, 2 months ago

Water is a polar solvent and has hydrogen bonding , so for any other compund to dissolve in water , it must posses Polarity or H-Bond. Ethyl alcohol shows presence of hydrogen bonding as well as it is polar due to high EN of oxygen , due to this it is soluble in water.

1Thank You

Ayush Kumar Singh 7 years, 2 months ago

Due to the presence of hydrogen bond

0Thank You

ANSWER

A reaction is A + B → C + D. Initially we start with equal concentration of A and B. At equilibrium we find the moles of C is two times of A. What is the equilibrium constant of the reaction?

Posted by Shivam Singh 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Shivshant Upadhyay 7 years, 2 months ago

KC is the equilibrium constant.

2Thank You

ANSWER

why hydrogen flouride gas exist as dimer?

Posted by Ayush Singh 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Isha Bhardwaj 7 years, 2 months ago

Due to H- bonding

2Thank You

ANSWER

What is psi?

Posted by Arastu Avinash 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Ankit Aryan Shivan 7 years, 2 months ago

Wave function is denoted by psi. Psi it self has no physical significent to the probability of finding an electron at any point.

1Thank You

ANSWER

Class 9 Atoms and molecules assignment

Posted by Kirti Mathur 7 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Isha Bhardwaj 7 years, 2 months ago

It is class 11 or agar 9th ka chahiye to 9th class fill karke .....is app par mil jaayega

0Thank You

Asif Parwez 7 years, 2 months ago

Ninth ka le kr kya krna hai

0Thank You

ANSWER

average kinetic energy of gas derivation

Posted by Simmi Rana 7 years, 2 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

100 ml of 2 M KOH solution is dilluted by 400ml water.The molarity of KOH in the resultant solution is? Plzz ans someone today is test!! Plzzz

Posted by Richa Mishra 7 years, 2 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

explain hydrogen spectrum with the help of bohrs theory

Posted by Ubaid Khan 7 years, 2 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Why carbon cannot form 4 bonds with other carbon atom

Posted by Arshad Mansoori 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Shreya Sharms 7 years, 2 months ago

Electron affinity of carbon is not enough to gain electrons. It's size is small to lose electrons .Also it's electronegativity is is not sufficient to attract electrons.

0Thank You

ANSWER

Important TOPICS IN THERMODYNAMICS FOR HALF YEARLY.........ANYONE ?plss

Posted by Rohit Kumar 7 years, 2 months ago

CBSE > Class 11 > Chemistry

3 answers

Rohit Kumar 7 years, 2 months ago

Only hess's law..........!!what about theory which may come.........?

1Thank You

Aryan Kumar 7 years, 2 months ago

Most important topic in thermodynamics is hess's law numericals.100% chances your teacher is take the question about the hess's law in half yearly exam.

2Thank You

Christin Mathew 7 years, 2 months ago

Process

1Thank You

ANSWER

What is room temperature

Posted by Krishna Sharma 7 years, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Ashish Parida 7 years, 2 months ago

298k= (25°c)

0Thank You

Anurag Mishra 7 years, 2 months ago

298K

3Thank You

ANSWER

plese tell me chemistary syllabus of class 11

Posted by Ubaid Khan 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 7 years, 2 months ago

First book for half yearly nd both the books.... i.e first and second book in final.

2Thank You

ANSWER

please tell the syllabus of equilibrium class 11 chemistry

Posted by Shivangi Bhardwaj 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Isha Bhardwaj 7 years, 2 months ago

Whole chapter

1Thank You

ANSWER

explain the hydrogen spectrum with the help of bohrs theory write the advantages and disadvantages

Posted by Ubaid Khan 7 years, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 7 years, 2 months ago

Bohr Model of Hydrogen
The simplest example of the Bohr Model is for the hydrogen atom (Z = 1) or for a hydrogen-like ion (Z > 1), in which a negatively-charged electron orbits a small positively-charged nucleus. Electromagnetic energy will be absorbed or emitted if an electron moves from one orbit to another. Only certain electron orbits are permitted. The radius of the possible orbits increases as n2, where n is the principal quantum number. The 3 → 2 transition produces the first line of the Balmer series. For hydrogen (Z = 1) this produces a photon having wavelength 656 nm (red light).

Problems with the Bohr Model
It violates the Heisenberg Uncertainty Principle because it considers electrons to have both a known radius and orbit.
The Bohr Model provides an incorrect value for the ground state orbital angular momentum.
It makes poor predictions regarding the spectra of larger atoms.
It does not predict the relative intensities of spectral lines.
The Bohr Model does not explain fine structure and hyperfine structure in spectral lines.

1Thank You

ANSWER

What is the colour of ray which emarge form cathod ray disharge tube

Posted by Rahul Kumar Saw 7 years, 2 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Which is the alphabrt not used in periodic table

Posted by Faizan Khan?? 7 years, 2 months ago

CBSE > Class 11 > Chemistry

4 answers

Faizan Khan?? 7 years, 2 months ago

W is present in periodic table tungsten W

0Thank You

Account Deleted 7 years, 2 months ago

0Thank You

Priya Dharshini ☺☺ 7 years, 2 months ago

W is also not present

1Thank You

Priya Dharshini ☺☺ 7 years, 2 months ago

that the letter "Q" does not appear in any official element names. Temporary element names, such as ununquadium, contain this letter. And J is also not present

1Thank You

ANSWER

Draw the hybridisation and shape of ClF3 on the basis of VESPER theory.

Posted by Ankit Raj 7 years, 2 months ago

CBSE > Class 11 > Chemistry