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

He did not explain the multielectronic species He unable to explain zeeman or stark effect Only gave the flat model of atom Ok i will clarify you that stark effect is the splitting of main line in presence of electronic field or in the case of zeeman effect there will u includ presence of magnetic field I hope it will helps u🌼☘️

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Nidhi Deshwal 7 months, 3 weeks ago

•Didn't tell about splitting of electron in magnetic and electric field . •Didn't tell about arrangement of electrons in an atom.

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Calculate wave number and frequency of yellow radiation having wavelenght 5800

Posted by Lovish Kumar 7 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 7 months, 3 weeks ago

Wavenumber = 1/Wavelength = Frequency/Speed of light.

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exception of electronic configuration 24

Posted by Vikas Mishra Mishra 7 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 7 months, 3 weeks ago

In Cr (Z = 24), expected configuration is [Ar] 3d4 4s2, but due to extra stability offered by half filled orbital configuration, obtained is [Ar] 3d5 4s1.

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Calculate de broglie wavelength of an element moving at 1% speed of light

Posted by Susma Rabidas 8 months ago

CBSE > Class 11 > Chemistry

0 answers

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Which of the following relates to photon both as wave function and as a stream of particle? A) Interference B) E=m.c.c C) E=h.neu D) Diffraction

Posted by Gayatri Pathade 8 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 8 months ago

E = hneu

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Write the importance of chemistry??

Posted by Dhaneswar Chalan 8 months, 1 week ago

CBSE > Class 11 > Chemistry

4 answers

Sariful Miah 8 months ago

What is the atomic number of carbon

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Tejas T. 8 months ago

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Tejas T. 8 months ago

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Tejas T. 8 months ago

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Explain why cation are smaller and anions larger in radii than their parent atoms?

Posted by Dhaneswar Chalan 8 months, 1 week ago

CBSE > Class 11 > Chemistry

2 answers

Sherif Gupta 8 months, 1 week ago

It can be explain through an example Na==no of p+=no of e– In Na+= no of p+ > no of e–, so more attraction takes place and hence size is reduced In Na-= no of p+ < no of e–, so less attraction takes place and hence size is increased Therefore, Na+ < Na < Na-

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Tejas T. 8 months, 1 week ago

It's easy

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What is parcel in chemistry and please give me video solution 🙏?

Posted by Rewati Raman 🤓🤓🤓 8 months, 1 week ago

CBSE > Class 11 > Chemistry

2 answers

Jatt Attri 7 months, 2 weeks ago

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Tejas T. 8 months ago

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What is definition of overlapping of atomic orbitals

Posted by Mohit Arora 8 months, 1 week ago

CBSE > Class 11 > Chemistry

2 answers

Tejas T. 8 months ago

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Ruchi . 8 months, 1 week ago

According to orbitals overlap concept the formation of a covalent bond between two atoms result by pairing of elements present in the valence shell having opposite spins.

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What is photoelectric effect. State the result of photoelectric effect experiment that could not be explain on the basis of law of classical physics

Posted by Shreya Rana 8 months, 1 week ago

CBSE > Class 11 > Chemistry

1 answers

Gayatri Pathade 8 months ago

The process of emission of e- from the metal surface when a light of suitable frequency strikes on certain metals. This is called Photoelectriceffect.

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Explain the formation of chemical bond

Posted by Koshal Chouhan 8 months, 2 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Nidhi Deshwal 7 months, 3 weeks ago

A chemical bond is a formation of bond due to the electrostatic forces of attraction due to sharing of electrons or donating electrons. The attractive force which holds up the constituent particles (atoms, ions or molecules) together in a chemical species is known as chemical bond.

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Brf5 hybridation

Posted by Sonali Singh 8 months, 2 weeks ago

CBSE > Class 11 > Chemistry

2 answers

Adithya Dev 8 months ago

No,not sp3. Here hybridisation h = 1/2 (Valence e + no of monovalent atoms + no of -ve charge - no of +ve chahe) = 1/2 (7+5) = 12/2 = 6 ~~ sp3d2 hybridisation. Hope you got what you wanted.

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Udit Kumar Dhruw 8 months, 2 weeks ago

1/2(3+5)=8/2=4 sp³hybridisation

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What is Planck 's quantum theory

Posted by Satya Vati 8 months, 2 weeks ago

CBSE > Class 11 > Chemistry

2 answers

Diya Rana 7 months, 2 weeks ago

According to the plank quantum theory any particle like electrons not continuosly but discontinuosly in the form of small discrete packet known as quanta or in the case of light this discrete packet remember that energy of this quantas are directly proportional the the frequency ....and plank quantum denoted by h and h= 6.626×10*34 jsec

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Adithya Dev 8 months ago

1) Matter emit radiation which constitute small packets of energy called quanta (For light, photon is the quanta). 2) The total energy of the radiation emitted is an integral multiple of the individual energies of each quanta, which is expressed as hv (where, h = Planck's constant = 6.626 × 10^-34 Jsec and v = frequency)

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What is mole concepts

Posted by Chandni Kumari 8 months, 2 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Aman Acharya 8 months, 2 weeks ago

Mole is a unit and it's concept is called mole concept and it's simply means a avogrado no as example 1 mole means 6.023×10²³ no

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Deleted syllabus of chemistry class 11 2023-24

Posted by Navrose Singh 8 months, 2 weeks ago

CBSE > Class 11 > Chemistry

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Boron occur in nature in to form of two isotope having atomic mass 10 and 11 what are the persentage abundance of two isotope in a simple of born having avaga at mass 10.8

Posted by Zaarakhan Khan 8 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Aman Acharya 8 months, 2 weeks ago

The Formula Of Average Atomic mass = Atomic Mass 1 × % Abudance + Atomic mass 2 × % abundance/ 100 10.8 = 11(x) + 10( 100-x ) / 100 1080 = 11x + 1000 -- 10x 1080 - 1000 = x x = 80 So boron having Atomic mass 11 have 80% abundance in nature and 10 has 20%

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At STP what will be the volume of 6.023×10^23 molecule of SO2 gas

Posted by Pranjal Mishra 8 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Abhrangshu Chakraborty 8 months, 3 weeks ago

22.7L (0°C, 1bar) 22.4L (0°C, 1 atm) 《From Avogadro's hypothesis》

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write all the possible positional isomers of the compound dichlorohexane

Posted by Redmi 10S 8 months, 3 weeks ago

CBSE > Class 11 > Chemistry

0 answers

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A certain particle carries 2.5×10-16 C of static electric charge. Calculate the number of electrons present in it.

Posted by Satyam Kumar Mishra 8 months, 4 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 8 months ago

Q = ±ne. ///// n = Q/e = 2.5 × 10^-16 /1.6 × 10^-19 = 25 × 10^3 / 16 = 1.5625 × 10^3 = 1563 electrons.

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Calculate the number of electrons present in 9.5gm of phosphate ion

Posted by Alina Patnaik 8 months, 4 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 8 months ago

No of moles = 9.5 / 95 = 0.1 mol. No of ions = 0.1 × 6.022 × 10^23 = 6.022 × 10^22 ions. (NOW, 1 (PO4)3- HAS 15 + 32 + 3 = 50e) Therefore, no of el = 50 × 6.022 × 10^23 = 3.011 × 10^25 electrons //

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Properties of s block elements

Posted by Deeksha Sohal 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Prathameh Kanhere 9 months ago

BeCl2 ka Sp hybridization

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Tetramethyl iupac name

Posted by Account Deleted 9 months ago

CBSE > Class 11 > Chemistry

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Numericals of mole fraction

Posted by Mayank Sharma 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Tejas T. 8 months ago

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Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 a calculate thress hold frequency we not and work function wnote of the metal

Posted by Riya Chand 9 months ago

CBSE > Class 11 > Chemistry

0 answers

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How electron lose,gain and share?

Posted by Aleena Ss 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 9 months ago

When no of electrons in the valence shell is less than 4, then, these electrons have a tendency to be lost from the atom so that the atom can attain the nearest (penultimate shell) octet. When no of electrons is greater than 4, there is a tendency that the atoms gain electrons in their neighborhood to attain nearest (valence shell) octet. But, when no of valence electrons is equal to 4, gaining 4 electrons is a matter outside the control of the nucleus and losing 4 electrons causes huge energy loss to the molecule, disturbing it's thermodynamic stability. So, here electrons are just shared, and not completely transferred as in the previous cases.

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Calculate the molarity of a solution containing 5g of NaOH in 450ml solution

Posted by Sarveshaa Ss 9 months ago

CBSE > Class 11 > Chemistry