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

It is possible, but you aren't able to comprehend the question. Air in which it is burnt does contain O2 which reduces carbon to CO2. So you must involve O2 as a reactant in the reaction. Now, check the LHS, we get 12g (C) + 32g (O2) = 44g = Mass of CO2 in RHS. Law of conservation of mass never has been wrong except in radioactive decays.

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Definition of de broglie equations

Posted by Ajay Nagar 1 year, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Khushi Panwar Gujjar 1 year, 2 months ago

E=hc/lemda

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Abhishek Pandey 1 year, 2 months ago

What is there 8 elements in 2 nd period

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How to find empirical formula

Posted by Arpita G 1 year, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Sanjana Gupta 10 months, 2 weeks ago

I recommended easy very way First you convert % In gram And then find no. Of mole and after you find the mole divide at small no. And you give a no. According to need multiply by 2 agar less than 1 haa too And finally you give a empirical formula after adjusting the number In a given element 👍

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Harshit Malik ... 1 year, 1 month ago

Empirical formula = n/ molecular formula

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Chapter 2 quiz test

Posted by Ram Harsh Pandey 1 year, 2 months ago

CBSE > Class 11 > Chemistry

0 answers

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Is thermodynamics an important chapter?

Posted by Ishika Bhalla 1 year, 2 months ago

CBSE > Class 11 > Chemistry

4 answers

Anushka Singh 1 year, 2 months ago

Yes But this chapter in only in 11 like you don't need it in 12 it's not in 12 My teacher told me

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Priyanka Prajapati 1 year, 2 months ago

Yes

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Gaurav Singh 1 year, 2 months ago

I think you should learn this chapter

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Gaurav Singh 1 year, 2 months ago

Yes

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Write any three limitations of Bohr model of an atom

Posted by Manasa Mannu 1 year, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Diya Rana 1 year, 2 months ago

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 1 year, 2 months 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 1 year, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 2 months ago

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

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exception of electronic configuration 24

Posted by Vikas Mishra Mishra 1 year, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 2 months 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 1 year, 2 months ago

CBSE > Class 11 > Chemistry

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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 1 year, 2 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 2 months ago

E = hneu

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Write the importance of chemistry??

Posted by Dhaneswar Chalan 1 year, 2 months ago

CBSE > Class 11 > Chemistry

4 answers

Sariful Miah 1 year, 2 months ago

What is the atomic number of carbon

3Thank You

Tejas T. 1 year, 2 months ago

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

Posted by Dhaneswar Chalan 1 year, 2 months ago

CBSE > Class 11 > Chemistry

2 answers

Sherif Gupta 1 year, 2 months 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. 1 year, 2 months ago

It's easy

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

Posted by Rewati Raman 🤓🤓🤓 1 year, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Jatt Attri 1 year, 2 months ago

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Tejas T. 1 year, 2 months ago

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What is definition of overlapping of atomic orbitals

Posted by Mohit Arora 1 year, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Tejas T. 1 year, 2 months ago

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Ruchi . 1 year, 3 months 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Gayatri Pathade 1 year, 2 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Nidhi Deshwal 1 year, 2 months 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Anjan Karthi 1 year, 2 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 1 year, 3 months ago

1/2(3+5)=8/2=4 sp³hybridisation

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What is Planck 's quantum theory

Posted by Satya Vati 1 year, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Diya Rana 1 year, 2 months 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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Anjan Karthi 1 year, 2 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 Hihi Hihi 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Aman Acharya 1 year, 3 months 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 1 year, 3 months 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Aman Acharya 1 year, 3 months 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Abhrangshu Chakraborty 1 year, 3 months 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

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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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 2 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 2 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 1 year, 3 months ago

CBSE > Class 11 > Chemistry