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Description The limiting reagent (or limiting reactant or limiting agent) in a chemical reaction is the substance that is totally consumed when the chemical reaction is completed. The amount of product formed is limited by this reagent, since the reaction cannot continue without it.

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In a chemical reaction, if limiting reagents are over than what is done with the left over element? Like in fomattion of ammonia, hydrogen is the limiting reagent, than where does the left over nitrogen goes?

Posted by Sulabh Gupta 5 years, 9 months ago

CBSE > Class 11 > Chemistry

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Cyclohexylamine is more basic than aniline. Explain

Posted by ᵐꜞᔆᔆ᭄ Qᴜᴇᴇɴ✿࿐꧂ : ꨄ︎•, 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 9 months ago

Aniline and cyclohexylamine both hane NH2 group and six carbon ring but the difference in basicity lies in a manner that aniline is a weak base then cyclohexylamine because aniline is an aromatic ring, because of the electron-withdrawing effect of the phenyl group aniline is a weak base.
The unshared ellectron pair of electron on nitrogen atom is present in conjucation with the benzene ring and becomes less available for protonation because of resonance

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does free shells exist

Posted by Bҽιɠԋ Aɱҽҽɾυʅ Iʂʅαɱ 5 years, 9 months ago

CBSE > Class 11 > Chemistry

2 answers

Riya Rana 5 years, 8 months ago

Yes it does

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Shreya _S❤ 5 years, 9 months ago

I think shell is just an imagination....it dosent exist at all

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Does fahrenheit scale can be found negative?

Posted by Sulabh Gupta 5 years, 9 months ago

CBSE > Class 11 > Chemistry

3 answers

Nagasaki Ali 5 years, 8 months ago

Yes

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Anjali Goyal 5 years, 9 months ago

Yes

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Kumud Goyal 5 years, 9 months ago

Yes it can be negative

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What are the physical and chemical properties of air?

Posted by Sulabh Gupta 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Ayush Gurjar 5 years, 9 months ago

Physical : it is gas Chemical: it is mixture

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Does solids contain inter ionic forces between them or they have any other type of forces through which they kepp themselves very close to each other?

Posted by Sulabh Gupta 5 years, 9 months ago

CBSE > Class 11 > Chemistry

7 answers

Shreya _S❤ 5 years, 9 months ago

I think log is organic substance...so it may probably contain covalent bonds

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Shreya _S❤ 5 years, 9 months ago

I don't know about it in that much detail...i am just going to appear in 11

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Sulabh Gupta 5 years, 9 months ago

Like if we take a log of wood then there will also be vanderwall or any other tye of forces?

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Shreya _S❤ 5 years, 9 months ago

Vanderwall forces in non metals....etc.etc

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Shreya _S❤ 5 years, 9 months ago

Metallic bond in metal

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Shreya _S❤ 5 years, 9 months ago

Covalent in covalent substances

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Shreya _S❤ 5 years, 9 months ago

Ionic forces in ionic substances....

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Define reposition.

Posted by Sulabh Gupta 5 years, 9 months ago

CBSE > Class 11 > Chemistry

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How will we find mole fraction

Posted by Surya Dubey 5 years, 9 months ago

CBSE > Class 11 > Chemistry

3 answers

Surya Dubey 5 years, 9 months ago

Thanks a lot

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Anjali Goyal 5 years, 9 months ago

No. Of moles of solute \total moles

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Yogita Ingle 5 years, 9 months ago

Mole fraction represents the number of molecules of a particular component in a mixture divided by the total number of moles in the given mixture. It’s a way of expressing the concentration of a solution.

The molar fraction can be represented by X. If the solution consists of components A and B, then the mole fraction is,

Mole of fraction of solute = moles of solute / (Moles of solute + Moles of solvent)

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Explain why BF3 exists whereas BH3 does not?

Posted by Pranav Choubey 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 9 months ago

Bh3 molecule is an electron deficient molecule in nature since the 6 electrons are around the 'B' atom. Hydrogen being small in size, plus electron deficient it cannot donate electrons to boron, hence to exist, Bh3 goes under dimerization so as to fulfill the electron deficiency and attain stability.

Hydrogen being small in size dimerization is possible.

Bf3 is also deficient but because of larger size of 'F' atom, it cannot undergo dimerization, so it exists as Bf3 with a partial negative charge in boron and partial positive charge on fluorine.

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How to redox reaction important in our life

Posted by Kamlesh Kks 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 9 months ago

Redox reactions have many applications in our daily life. The most common example is combustion; where in oxygen gets reduced while carbon gets oxidized like burning of fuels in automobiles etc. Second application is in batteries or electrochemical cells used in invertors and dry cells which use oxidation-reduction reactions to produce an electric current. Oxidation-reduction reactions are responsible for the spoiling of food. Rusting of iron is also an example of redox reaction. The Enzymes in our human body regulate oxidation-reduction reactions occuring inside the body.Photosynthesis and respiration both are oxidation-reduction or redox reactions.

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Whole chemists reaction....

Posted by Tapasya Parashar 5 years, 9 months ago

CBSE > Class 11 > Chemistry

0 answers

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Name an common antacid

Posted by Komal Khatkar 5 years, 9 months ago

CBSE > Class 11 > Chemistry

9 answers

Samiksha Jain 5 years, 8 months ago

Baking soda or milk of magnesia

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Srishti Gupta 5 years, 9 months ago

Milk of magnesia

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Priyanka Chouhan 5 years, 9 months ago

Baking soda is common antacid

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Navneet Kumar 5 years, 9 months ago

Baking soda

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Aditya Chauhan 5 years, 9 months ago

BAKING SODA

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Αα∂Уα Ѕιиgн ? 5 years, 9 months ago

Baking Soda n Milk of magnesia....

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Mr. Singh 5 years, 9 months ago

How protect CORONA virous ??

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Yogita Ingle 5 years, 9 months ago

Antacids are used to cure indigestion in a body.
They are group of mild bases and have no toxic effects on body.
They are basic in nature so reacts with excess acids in stomach and neutralise it.

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Ragini Agrawal 5 years, 9 months ago

Baking soda

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Dedine P- Block element

Posted by Mr. Singh 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 9 months ago

P block elements are in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons therefore in all there are six groups of p-block elements.

P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

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Define MOT.

Posted by Mr. Singh 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Mr. Badmash 5 years, 9 months ago

Molecular orbital (MO) theory is a method for describing the electronic structure of molecules using quantum mechanics. Electrons are not assigned to individual bonds between atoms, but are treated as moving under the influence of the nuclei in the whole molecule.

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if any element anion (x_)have 18electron and the mass of the element is 354 find out the number of neutrons in necules of the element

Posted by Dishant Sharma 5 years, 9 months ago

CBSE > Class 11 > Chemistry

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Define Equilibrium.

Posted by Mr. Singh 5 years, 9 months ago

CBSE > Class 11 > Chemistry

5 answers

Mr. Singh 5 years, 9 months ago

11 gaya

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Mimansa Gupta 5 years, 9 months ago

Are you in 10th or 11th

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Mr. Singh 5 years, 9 months ago

Where did you go ?

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Mr. Singh 5 years, 9 months ago

Hello

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Yogita Ingle 5 years, 9 months ago

For a certain chemical reaction, the equilibrium constant is defined as the ratio between the amount of reactant and the amount of product which is used to determine chemical behavior.

At equilibrium, Rate of the forward reaction = Rate of the backward reaction

i.e. r_f = r_bOr, k_f × α × [A]^a[B]^b = k_b × α × [C]^c[D]^d

At a particular temperature, the rate constants are constant. The ratio of the rate constant of forward reaction to the rate constant of backward reaction should be a constant and is called an equilibrium constant (K_equ).

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Calculate first excitation energy of electron in hydrogen atom

Posted by Amna Ansari 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 9 months ago

Excitation energy of any orbit can be found out by this formula
E_n = -13.6/n2
For hydrogen
E₁ =-13.6/1
E₁=-13.6

Ionization energy is the energy required to remove an electron from the valence shell of any atom , for hydrogen the ionization energy and excitation energy are equal i-e -13.6 eV

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Write chemical equation for satzeff rule

Posted by Hitender Rathore 5 years, 9 months ago

CBSE > Class 11 > Chemistry

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What is the maximum number of significant figures

Posted by Lokesh Dhote 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Nikhil Kumar 5 years, 8 months ago

Infinite

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What's is resonance with examt

Posted by Aakash Roy 5 years, 9 months ago

CBSE > Class 11 > Chemistry

2 answers

Prateek Singh 5 years, 9 months ago

Resonance is the shifting of pi bond,,,or rotation of pi bond...forming 2 or more similar Lewis structure.. Ex. Chlorination of acetic acid

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Yogita Ingle 5 years, 9 months ago

Resonance structures are sets of Lewis structures that describe the delocalization of electrons in a polyatomic ion or a molecule.

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The value of kc = 4.24 at 800k for the reaction co + h2o = co2 + h2 Calculate equilibrium concentrations of co2,h2,co and h2o at 800k if only co and h2o are present initially at concentrations of 0.10M each

Posted by Karan Viras 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Mr. Singh 5 years, 9 months ago

CO(g) +H2O(g) =CO2(g) + H2(g) initially conc. 0.1M 0.1M 0 0 At eqm. (0.1-x)M (0.1-x)M xM xM x is a mole of each of product be formed. Applying Law of Chemical Equilibrium, Kc= [CO2][H2] / [CO][H2O] .........1 therefore, 4.24=x square / (0.1-x)square = x / 0.1-x = 2.06 OR x= 2.06(0.1-x) x= 0.206-2.06x 3.06x = 0.206 x= 0.206 / 3.06 = 0.067 therefore, [CO2]eq. = [H2]eq. = 0.067 M. [CO]eq. = [H2O]eq. = 0.1-0.067 = 0.033 M.

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An oxygen cylinder has 10 L oxygen at 200 atm. If patient takes 0.5 ml of oxygen at 1 atm in one breath at 37 degree celsius. How many breaths are possible?

Posted by Yash Prasad 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Mr. Singh 5 years, 9 months ago

10L at 200 atm = ? L at 1 atm P1V1 , P2V2 200 INTO 10 1 INTO V2 OR V2 = 2000L, Temperature =Constant =37°C No: of breath = Total volume/Volume for 1 breath = 2000 L/0.5 INTO 10 to the power 3 L = 4 INTO 10 to the power 6.

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If an electron is moving with a velocity of 600m/s which is accurate upto 0.005% then calculate the uncertainty in its position. (h=6.626×10^-34 j/s and mass of electron =9.11×10^-31)

Posted by Deepak Sharma 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Mr. Singh 5 years, 9 months ago

By Heisenberg's uncertainty principle, Δx.mΔv =h/4π .ΔVacc =0.005% OR Δv=600✖0.005/100 = 0.03m/s^-1 Δx✖9.1✖10^-31✖0.03 = 6.6✖10^-34/4✖3.14 Hence, Δx = 6.6✖10^-34 / 4✖3.14✖0.03✖9.1✖10^-31 = 1.92✖10^-3 m.

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What is permutit?

Posted by Malvika Bhatt 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 9 months ago

Permutit is a complex inorganic salt. It is a manmade zeolite. Chemical formula of zeolite is Na₂Al₂O₃ .nSiO₂.xHO . It is also known as Sodium aluminium silicate. Zeolite is made up of microporous minerals which have the capacity of exchanging ions. Hence Zeolite is used to remove the hardness of the water. Process of removing the hardness of water by using Permutit is called a Permutit or zeolite process.

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Neil bohr theory ?

Posted by Aditya Chauhan 5 years, 9 months ago

CBSE > Class 11 > Chemistry

1 answers

Ayushi Ayushi 5 years, 9 months ago

In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted.

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Electronic configuration of o2

Posted by Shahid Hussain 5 years, 9 months ago

CBSE > Class 11 > Chemistry