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

The octet rule is a general rule of thumb that applies to most atoms. Basically it status that every atom wants to have eight valence electrons in its outermost shell.

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Plz Anyone describe gaseus law and maltiple proportional law plz?

Posted by Mohd Ghaffar 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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Hi j. Ready for test.

Posted by Robinpreet Kaur 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Gulab Nagri 6 years, 5 months ago

Yes r. I am ready . please tell me your question.

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Describe main postulates of bohr atomic model

Posted by Alok Singh 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Robinpreet Kaur 6 years, 5 months ago

Bohr's Model postulate that electrons revolves around the nucleus in circular path . OK

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How many chapter are coming in first periodic test??

Posted by Tripti Verma 6 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Aditya Narayan Singh 6 years, 5 months ago

Your school teachers know it better

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Aditya Chauhan 6 years, 5 months ago

Not more than your school teacher tells???????

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Volumetric analysis

Posted by Vipul Chauhan 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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The element common to all acids is?

Posted by Shivay Funny Word 6 years, 5 months ago

CBSE > Class 11 > Chemistry

3 answers

Sia ? 6 years, 5 months ago

Hydrogen

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Aditya Narayan Singh 6 years, 5 months ago

Hydrogen

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Ashish Sah 6 years, 5 months ago

Hydrogen

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124 amu of p4 wiĺl contain

Posted by Zahid Mirza 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

S D 6 years, 5 months ago

mass of p4= 120amu 120 amu= 6.022×10^23 molecules of p4 124 amu= 124×6.022×10^23/120 molecules of p4

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Calculate the molarity of 1.26% by weight of HNO3 if specific gravity is 1.4

Posted by Khyati Jha 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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The diameter of the zinc atom is 2.6 angstorm . Calculate radius in picometer Number of atoms present in the length of 1.6 M if the string atom are arranged side by side.

Posted by Richu Riz 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 5 months ago

Radius of zinc atom = {tex}\frac{(2.6 \stackrel{\circ}{A})}{2}{/tex} = 1.3 {tex}\begin{array}{l}{0} \\ {A}\end{array}{/tex}= 1.3 {tex}\times{/tex}10^-12m = 130 pm
Length of the scale = 1.6 cm = 1.6 {tex}\times{/tex} 10¹⁰ pm
Diameter of zinc atom = 260 pm
{tex}\therefore{/tex} No. of zinc atoms placed side by side = {tex}\frac{\left(1.6 \times 10^{10} \mathrm{pm}\right)}{(260 \mathrm{pm})}{/tex}= 6.154 {tex}\times{/tex} 10⁷

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Hello S and j . Are you online if online then send me O and after I ask u questions from chapter 3 of chemistry

Posted by Robinpreet Kaur 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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Gulab Nagri 6 years, 5 months ago

hello rb . i am online please tell me any question from chapter 3 chemistry .

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2moles of an equimolar mixture of alcohols r1oh and r2oh are esterified with 1 mole of acetic acid if only 80% of acid is consumed till equilibrium and quantities of ester found under equil are in the ratio 3:2.what is the value of equil const for the esterification of r1oh

Posted by Anju Singh 6 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Sumit Kumar 6 years, 5 months ago

I know

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Anju Singh 6 years, 5 months ago

0.48

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What is the atomic mass of crpton

Posted by Henil Talavia 6 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Robinpreet Kaur 6 years, 5 months ago

It's wrong. Crpton = 36

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Henil Talavia 6 years, 5 months ago

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2 moles of an iquimolar mixture of two alcohols are esterified with 1 mole of acetic acid if only 80% of acid is consumed till equilibrium

Posted by Anju Singh 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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Why can't we use de - Broglie principle for macroscopic particle

Posted by Samiksha Raj 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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Why can't we use de-Broglies principle for microscopic particles

Posted by Samiksha Raj 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Robinpreet Kaur 6 years, 5 months ago

Because microscopic particles are not seen by a naked eye

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calculate the molarity and molality of a solution by mixing equal volumes of two 24.5% weight by weight h2 s o4 solution density is equal to 1.2 and 73.5 w by e solution diesel density is equal to 1.6 if the density of mixture is 1.4

Posted by Devendra Pathak 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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What is atomic number of Rb

Posted by Gurwinder Singh 6 years, 5 months ago

CBSE > Class 11 > Chemistry

4 answers

Aditya Narayan Singh 6 years, 5 months ago

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Robinpreet Kaur 6 years, 5 months ago

Rb= 37

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Gulab Nagri 6 years, 5 months ago

The atomic no. of Rb. is 37.

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Yogita Ingle 6 years, 5 months ago

The atomic number of Rb is 37.

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What is the defference between orbital and orbit

Posted by Mridul Singh 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 5 months ago

Orbit	Orbitals
An orbit is the simple planar representation of an electron.	An orbital refers to the dimensional motion of an electron around the nucleus in a three dimensional motion.
It can be simply defined as the path that gets established in a circular motion by revolving the electron around the nucleus	An orbital can simply be defined as the space or the region where the electron is likely to be found the most.
The shape of molecules cannot be explained by an orbit as they are non directional by nature.	The shapes of the molecules can be found out as they are directional by nature.
An orbit that is well defined goes against the Heisenberg principle.	An ideal orbital agrees with the theory of Heisenberg’s Principles.

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Properties of Mendeleev periodic table

Posted by Rehan Ali 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 5 months ago

Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group.

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Please send me examples related to fractional oxidation number

Posted by B Jindal 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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Mathmatical experrsion

Posted by Mahbuba Choudhury 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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What is the syllabus of organic in class 11

Posted by Akshay Sharma 6 years, 5 months ago

CBSE > Class 11 > Chemistry

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Sia ? 6 years, 5 months ago

You can check syllabus here : https://mycbseguide.com/cbse-syllabus.html

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Shape of p orbital

Posted by Aishvaryam Yash 6 years, 5 months ago

CBSE > Class 11 > Chemistry

4 answers

Nidhi Sharma 6 years, 5 months ago

(?)=dumbled shape

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Nidhi Sharma 6 years, 5 months ago

Dumbled shape

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Sarah ? 6 years, 5 months ago

Dumbbell shaps

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Aditya Narayan Singh 6 years, 5 months ago

Dumbbell

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What is molality and molarity

Posted by Asha Verma 6 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Unnati Pragya 6 years, 5 months ago

Number of moles of solute present in 1 kg of solvent is called molality Number of solute present in one litre of water is called molarity

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Monu Raja 6 years, 5 months ago

Molarity-no of mole of solute present in one litre in water Molality- no. Of mole is present in one kg of solvent

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What is the number of photons of light with a wavelength of 4000 PM that provide 1 joule of energy

Posted by Mohd Shahid 6 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Om Vyas 6 years, 5 months ago

0.223×10^-35.

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Sanjana Gupta 6 years, 5 months ago

2.014 ×10 to the power 15

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Calculate the number of electron which will together weigh one gram

Posted by Ranjeet Kashyap 6 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 5 months ago

Mass of an electron = 9.1 {tex}\times{/tex} 10^-28 g
9.1 {tex}\times{/tex} 10^-28 g is the mass of = 1 electron
1.0 g is the mass of = {tex}\frac{1}{9.1 \times 10^{-28}}{/tex}= 1.098 {tex}\times{/tex}10²⁷ electrons

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C=54.54% H=9.9% vapour density is 44 find the molecular formula

Posted by Athira Venugopal 6 years, 5 months ago

CBSE > Class 11 > Chemistry