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How would you react to the statement that the Electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?

Posted by Ayush Sharma {Xl-A} 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Palak Shukla 3 years, 4 months ago

It is not possible to have value of 3.0 for electronegativity of N in all its compound .

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Which two things in this universe don't participate in chemistry?

Posted by Priyanshi Sharma 3 years, 4 months ago

CBSE > Class 11 > Chemistry

5 answers

Priyanshi Sharma 3 years, 4 months ago

Metabolism is the chemical reaction in the body's cells and it is performed for sometime after death of the cell. I didn't get any appropriate answer here.

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Anjan Karthi 3 years, 4 months ago

OK, then dead cells?

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Anjan Karthi 3 years, 4 months ago

That is where there is a confusion. Because nuclear reactions can be partially physical and chemical.

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Priyanshi Sharma 3 years, 4 months ago

So, they also involve chemistry.

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Priyanshi Sharma 3 years, 4 months ago

Nuclear reactions involve change in atom's nucleus and produces different element. (@AdityaDevA)

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Calculate the mole - 10 gm of H2C2O4

Posted by Shalu Singh 3 years, 4 months ago

CBSE > Class 11 > Chemistry

3 answers

Sanjeev Sharma 3 years, 4 months ago

1/9

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Ayush Sharma {Xl-A} 3 years, 4 months ago

No. Of moles= mass given/ molar mass Moles= 10/90=0.1111 moles

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Priyanshi Sharma 3 years, 4 months ago

Number of moles = Mass given / Molar mass Molar mass = 2×1 + 2×12 + 16×4 = 90 = moles = 10/90 = 1/9 = 0.11

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What are the two things in this universe that don't participate in chemistry?

Posted by Priyanshi Sharma 3 years, 4 months ago

CBSE > Class 11 > Chemistry

5 answers

Anjan Karthi 3 years, 4 months ago

They are results of NUCLEAR reactions, not chemical ones.

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Anjan Karthi 3 years, 4 months ago

And heat from the sun.

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Anjan Karthi 3 years, 4 months ago

Then, it might be sunlight.

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Priyanshi Sharma 3 years, 4 months ago

Time is a fundamental (physical) quantity which we study in chemistry. Space also contains chemistry because it contains complex chemical compounds and some gaseous molecules (like H2O) and hydrogen and dust particles.

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Anjan Karthi 3 years, 4 months ago

Space and time, I believe.

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Name any two things in this universe that don't participate in chemistry.

Posted by Priyanshi Sharma 3 years, 4 months ago

CBSE > Class 11 > Chemistry

5 answers

Priyanshi Sharma 3 years, 4 months ago

1Thank You

Anjan Karthi 3 years, 4 months ago

That is what I believe.

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Anjan Karthi 3 years, 4 months ago

Time and space.

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Priyanshi Sharma 3 years, 4 months ago

If you don't have a single idea about the answer, don't try to answer because no one is forcing you and BTW body also contains chemistry because it have some mass and occupy space. Also, some chemical reactions are taking place inside the body.

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Amit Tanwar 3 years, 4 months ago

you amd me

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An electrolyte dissolve in water when

Posted by Sachin Yadav 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

??? ??? 3 years, 4 months ago

When lattice energy of ion is less than hydration energy.

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Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic table.

Posted by ??? ??? 3 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Anjan Karthi 3 years, 4 months ago

1) Electronic density. 2) Nuclear attraction on valence electrons. 3) Electronegativity.

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??? ??? 3 years, 4 months ago

Please guys help me for this question .??

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What is the development of chemistry

Posted by Abhishek Meena 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 3 years, 4 months ago

The development of the modern scientific method was slow and arduous, but an early scientific method for chemistry began emerging among early Muslim chemists, beginning with the 9th-century chemist Jābir ibn Hayyān (known as "Geber" in Europe), who is sometimes regarded as "the father of chemistry".

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Azwsdfhgyt56i890po:44_________-77⁷⁷7777ijnx?

Posted by Adiba Jawed 3 years, 4 months ago

CBSE > Class 11 > Chemistry

4 answers

Mukul Kumar 3 years ago

Azjakdjxj_____-323302ydjdd sh. ??

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Uma Pankajam. S 3 years, 4 months ago

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Divya Kumari 3 years, 4 months ago

Hhhhhh

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??? ??? 3 years, 4 months ago

What is this?

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Predict the shape of ph3 molecule molecule according to vsepr theory

Posted by Shruti Agrawal 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

??? ??? 3 years, 4 months ago

According to VSEPR theory the molecule ph3 has trigonal pyramidal shape due to lone pair and bond pair repulsion.

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A 12.8 l volume of gas contains 0.000498 miles of oxygen gas. At constant temperature and pressure, what volume does 0.0000136 moles of the gas fill?

Posted by Rozy Singh 3 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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A family consume 0.525 sugar per day , then how much sugar will be the family required in a month

Posted by Gouri Meena 3 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Calculate the formal charge of each oxygen atom of oxygen molecule

Posted by Spoorthi Spoorthi 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Preeti Dabral 3 years, 4 months ago

Formal charge of the oxygen atom 1= Valence electron - 12bonding electrons - nonbonding electrons. - The formal charge on oxygen atom 1 is zero. - The formal charge on oxygen atom 2 is '1'. - The formal charge on oxygen atom 3 is '-1'.

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Discuss modern atomic theory.why it is better than Delton's atomic theory?

Posted by Sukhjinder Singh 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 3 years, 4 months ago

To describe the structure of atom and laws of chemical combination, Dalton’s Atomic Theory was put forward. According to this theory, matter is made up of small particles called atoms which are indivisible and indestructible. Atoms of same element are identical in shape, size, mass and chemical properties but the properties are different for atoms of different elements. They react with each other in different ratios (in simple whole number ratios) to form compounds or molecules.

This theory has some limitations like

1) It can explain the laws of chemical combination by mass but not by gaseous volumes.

2) it cannot explain why atoms of different elements have different properties.

3) Why atoms of different elements combine to form molecules?

4) What is the nature of binding forces that exist between atoms and molecules to form three states i.e. solid, liquid and gases?

To explain all above points modern atomic theory was introduced. According to this theory-

1) Atom is not indivisible as it is not the smallest particle. It is made up of electrons, protons and neutrons.

2) Atoms of different elements may have same atomic masses. Such atoms are called isobars.

3) Atoms of same element may have different atomic number. These atoms are called isotopes.

4) Atoms of different elements may react with each other in integral ratios also. It is not necessary to react in simple whole number ratios to form compounds or molecules.

5) Atoms are not indestructible. Atom of one element can be changed into another.

Because of all these explanations that modern atomic theory can give, it is better than Dalton's Atomic theory.

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What is mean by orbital

Posted by P.Akshitha Reddy 3 years, 4 months ago

CBSE > Class 11 > Chemistry

3 answers

Adithya Dev A 3 years, 4 months ago

It is the "clouded" area around a nucleus where there is most probability of finding an electron. It is based on Heisenberg's Uncertainty principle.

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Ankita Singh 3 years, 4 months ago

Electron arrange themselves in cloudlike region around the nucleus called orbital

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Aryan Dhaka 3 years, 4 months ago

Orbital means pagal hai kya

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significance of ψ and ψ2 in chemistry

Posted by Ekam Latti 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 3 years, 4 months ago

ψ is a wave function and refers to the amplitude of electron wave i.e. probability amplitude. It has got no physical significance. The wave function ψ may be positive, negative or imaginary.
[ψ]² is known as probability density and determines the probability of finding an electron at a point within the atom. This means that if:
(i) is zero, the probability of finding an electron at that point is negligible.
(ii) [ψ]² is high, the probability of finding an electron is high i.e. electron is present at that place for a long time.
(iii) [ψ]² is low. the probability of finding an electron is low i.e. electron is present at that place for a shorter time.

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Write correct orbital notation for each (I)n=1,l=0,m=0

Posted by Rahul Rajput 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Dheeraj Pandey 3 years, 4 months ago

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Periodic table of elements

Posted by Tejaswi Kumar 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 3 years, 4 months ago

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PPT on periodic classification of element

Posted by Rashmi Mehta 3 years, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Can anyone tell me if the reduced syllabus is also coming in neet

Posted by Drishty Kamboj 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Priyanshi Sharma 3 years, 4 months ago

Yes, the reduced syllabus will also come in the neet exam as it is an entrance exam.

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What is magnetic quantam number ?

Posted by Utkarsh Singh 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

K I L L E R . 3 years, 4 months ago

The magnetic quantum number of an electron is one of the four quantum numbers that state the position of the electron with respect to the nucleus. The other three are- Principal quantum number Azimuthal quantum number Spin quantum number

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1 mole is called

Posted by Khushi Raval 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev A 3 years, 4 months ago

1 mole is the amount of substance which has a mass equal to 1 g ie, the mass of 6.022 * 10^ 23 elementary entities. In a gas, 1 mole volume is equal to 22.4 l.

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1.5 Calculate the mass of sodium acetate (CH COONa) required to make 500 mL of 0.375 molar aqueous s solution. Molar mass of sodium acetate is 82.0245 g mol.

Posted by Vaibhav Pandey 3 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev A 3 years, 4 months ago

W2 = ?, M2 = 12 + 3 + 12 + 16 + 16 + 23 = 27 + 55 = 82g. V = 500 mL. M = 0.375 mol/L. Therefore, M = W2 /M2V * 1000. W2 = MM2V / 1000 = 0.375 * 82 * 500/1000 = 0.375 * 41 = 15.375g.

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Vitamin c is essential for prevention of scurvy . Combustion of 0.2000gram of vitamin c gives 0.2998 gram of co2 and 0.819 of H2O . What's empirical formula of vitamin c

Posted by Satakshi Mishra 3 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Sia ? 3 years, 4 months ago

let vitamin C empirical formula is CxHy
CxHy + (x +y/4) O2 ------> xCO2 + y/2 H2O
now,
you see 1 mole of vitamin C form x mole CO2 and y/2 mole of H2O
so,
(0.2000)/(12x+y)= x (0.2998)/(44)
again,
(0.2000)/(12x + y)= y/2 (0.819)/(18)
divide both,
1 = x (0.2998). (18)/y/2 (0.819)(44)
y (0.819)(22) = x (0.2998)(18)
x/y = (0.2998)(18)/(0.819)(22)
= 3/10
hence, empirical formula of vitamin C is C₃H₁₀

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Gurkirt Singh 3 years, 4 months ago

Hello

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A jug contain 2l of milk calculate the volume of the milk in m3

Posted by Riya Shukla 3 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Aman Kumar 3 years, 4 months ago

2*10^-6m^3

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Aman Kumar 3 years, 4 months ago

2*10^-6m^3

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Find molarity of solution that has 9.8g of. H2so4 Present in 100 ml solution

Posted by Santhosh S 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev A 3 years, 4 months ago

Molar mass of H2SO4 = 98 g. Therefore, M = 9.8/(98 * 100) * 1000 = 1 M.//

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Use the data given in the following table to calculate the molar mass of occuring argon isotopes: Isotope 36 Ar 38 Ar 40 Ar Isotopic molar mass 35.96755 37.96272 g 39.9624 g mo * l ^ - 1; mo * l ^ - 1; mo * l ^ - 1 Abundance 0.337% 0.063% 600\% naturally

Posted by Vaibhav Pandey 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

??? ??? 3 years, 4 months ago

Molar mass of argon= Atomic mass of 36 Ar = 35.96755 and abundance = 0.337 Total atomic mass of 40 Ar = 39.9624*99.600= 39.802g/mol Therefore molar mass of argon = total mass of 36 Ar + total mass of 38 Ar + atomic mass of 40 Ar= 0.121+0.024+39.802 = 39.947g/ mol.

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Among the following pairs of orbitals which orbital will experience lager effective nuclear charge ? 2s and 3s

Posted by Patel Samiya 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

??? ??? 3 years, 4 months ago

2s orbital have larger effective nuclear charge than 3s orbital because 2s is closer than 3s to the nucleus.

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200 ml of 0.05 M magnesium chloride is mixed with 75ml of 0.1M silver

Posted by Paramvir Singh Punia 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

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Calculate mass of CO2 containing same number of oxygen atoms as in 3 g of NO

Posted by Lavisha Mahajan 3 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Preeti Dabral 3 years, 5 months ago

molar mass of CO₂=44g
molar mass of NO =15g
no of molecules in 15 g NO= NA
no of molecules in 3g of NO=(3/15)NA
given, molecules in 3g of NO=molecules in m g of CO₂
m/44×NA=3/15×NA
m=3×44/15
=8.8g of CO₂

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Samy Banik 3 years, 5 months ago

wow

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