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Which of the following orbitals has the lowest energy? Explain (a) 4d (b) 4f (c) 5s (d) 5p

Posted by Yash Roy 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 1 month ago

The order of the electron orbital energy levels, starting from least to greatest, is as follows: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.

5 s has lowest energy

ANSWER

What is orbits

Posted by Boparai Boparai 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Ankit Singh Thakur???? 5 years, 1 month ago

an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet. Normally, orbit refers to a regularly repeating trajectory, although it may also refer to a non-repeating trajectory

Gaurav Seth 5 years, 1 month ago

An orbital is the region of space around the nucleus within which the probability of finding an electron of given energy is maximum. The probabilit The probability at an y at any point around the nucleus is calculated using schrodinger w y point around the nucleus is calculated using schrodinger wave equation and is represented by the density of the points.

ANSWER

Questions based upon molarity

Posted by Sweety Bankar 5 years, 1 month ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

If 20 g of CaCo3 is treated with 20g of HCl , how many grams of Co2 can be produced according to the reaction.

Posted by Pooja ** 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Tushar Hooda 5 years, 1 month ago

CaCO3 + 2 HCl ------> CaCl2 + H2O + CO2 Thus, 1 mole of calcium carbonate treated with 2 mole of hydrochloride acid gives you 1 mole of carbon dioxide. Now, no.of moles in calcium carbonate = 20/100 = 0.2 moles Thus, we get from above that, 0.2 moles of calcium carbonate will give 0.2 moles of carbon dioxide. Now, We know molar mass of CO2=44 g And moles of CO2= 0.2 Thus, Mass of CO2= 44×0.2 = 8.8 g Hence , we get that 20g of CaCl2 will give 8.8 g of CO2. Similarly, you find the mass of CO2 with using HCl and In both the cases you will get same answer

ANSWER

What is water??

Posted by Dhruv .. 5 years, 1 month ago

CBSE > Class 11 > Chemistry

5 answers

Pooja ** 5 years, 1 month ago

It is the product of two molecules of hydrogen and one molecule of oxygen. In simple words you take it when you are thirsty.

Vaishu Sahu 5 years, 1 month ago

H2O

R G R 5 years, 1 month ago

Usne yaha likha kya tha?

Dhruv Agrawal 5 years, 1 month ago

Paani

Adarsh Kumar 5 years, 1 month ago

H2O

ANSWER

What is air?

Posted by Dhruv .. 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 5 years, 1 month ago

Air is a mixture of gases which makes up the Earth's atmosphere. These gases are colourless and odourless and hence, we can't see them but only feel them. The atmosphere is an ocean of these gases.

ANSWER

What is a chemistry ? ?

Posted by Nirbhay Hiwse 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Pooja ** 5 years, 1 month ago

Chemistry is the branch of science that studies the composition, properties, structures and interaction of matter.??

Pro Gamer Gaming 5 years, 1 month ago

Hlo. Chemistry is the complex emotional or psychological interaction between people....or .. .. The branch of science concerned with the substances of which matter is composed the investigation of their properties and reactions to form new substances ...... hope u understand...????

ANSWER

Explain electronic configuration of he and n according to pauli and hund's principle.

Posted by Diya Panchal 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Prabhat Singh 5 years, 1 month ago

Ye kis chapter ka h

ANSWER

Determine the molecular formula of an oxide of iron,in which the mass per cent of iron and oxygen are 69.9 and 30.1, respectively

Posted by Binoj Manikandan 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 5 years, 1 month ago

We have given,

Mass percent of iron (Fe) =69.9%

Mass percent of oxygen (O)=30.1%

Number of moles of iron present in the oxide =69.90/55.85 =1.25

Number of moles of oxygen present in the oxide=30.1/16.0

=1.88

Ratio of iron to oxygen in the oxide,

1.25:1.88

=1:1.5

=2:3

Therefore the empirical formula of the oxide is Fe₂O₃.

Empirical formula mass of Fe₂O₃= [2(55.85) +3(16)]g

Molar mass of Fe2O3=159.69g

Thus, n= Molar mass/Empirical Formula mass =159.69/159.7g

=0.999 = 1(approx.)

Molecular formula of a compound is obtained by multiplying the empirical formula with n. Thus, the empirical formula of the given oxide is Fe₂O₃ and n is 1.

Hence, the molecular formula of the oxide is Fe₂O₃.

ANSWER

surface tension of liquids

Posted by Sahil Malik 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Prateek .. 5 years, 1 month ago

Really helpful.

Gaurav Seth 5 years, 1 month ago

Surface tension is the property of any liquid by virtue of which tries to minimize its free surface area.

Surface tension of a liquid is measured as the force acting per length on an imaginary line drawn tangentially on the free surface the liquid.

Surface tension S = Force/Length = F/l = Work done/Change in area

Its SI unit is Nm^-1 or Jm^-2 and its dimensional formula is [MT^-2].

It is a scalar quantity. Surface tension is a molecular phenomenon which is due to cohesive force and root cause of the force is electrical in nature.

Surface tension of a liquid depends only on the nature of liquid and independent of the surface area of film or length of the line .

Small liquid drops are spherical due to the property of surface tension.

ANSWER

The ionisation energy and electron affinity of an element are 13.0 eV and 3.8 eV respectively. The numerical value of its electro negativity is

Posted by Sai Sahithi 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Anoushka Patra 5 years, 1 month ago

Xm=0.187(13.0+3.8)+0.17 =3.311or 3.5

ANSWER

Which side book is best for chemistry

Posted by Suraj Mishra 5 years, 1 month ago

CBSE > Class 11 > Chemistry

5 answers

Sonami Barik 5 years, 1 month ago

I suggest dinesh

Pro Gamer Gaming 5 years, 1 month ago

I will suggest dinesh guide for chemistry.. for me it's very helpful and beneficial.. for physics I will suggest pardeep guide named as fundamental physics... try it at once.. really useful.. if u will read it at once briefly.. u can score 90 above easily. Trust me..???

Sarthak Gandhi 5 years, 1 month ago

I would suggest "https://physicswallah.com " this is a YouTube site.

Suraj Mishra 5 years, 1 month ago

Thanks shreeya

Shreeya Asthana 5 years, 1 month ago

NCERT is enough but if u need any other side book then you should follow modern publications books

ANSWER

How is the electronic configuration of neon 3s^23p^6

Posted by Tanusree Sarkar 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Tanusree Sarkar 5 years, 1 month ago

Plz answer someone

ANSWER

What are elements and why they are arranged in periodic table!

Posted by Riya Kane 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Pooja ** 5 years, 1 month ago

Elements- A pure substance which can neither be decomposed into nor built from simpler substances by ordinary physical or chemical methods. Between 1800 to 1869, the number of identified elements had become nearly 63. With such large number of elements, it become difficult to study individually the chemistry of all these elements and their innumerical compounds. To study the chemical and physical properties systematically, the elements are arranged in a periodic table....... Hope you understand ??

Tanusree Sarkar 5 years, 1 month ago

They are arranged in periodic table so that we can learn in easily

ANSWER

Explain the electronic configuration of he and n according to Pauli and hunds principle

Posted by Riya Nirala 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Gaurav Seth 5 years, 1 month ago

Hund's Rule, the Aufbau Principle, and the Pauli Exclusion Principle help us define how electrons fill the orbitals within an atomic structure.The Pauli Exclusion Principle states that no two electrons can have the same quantum number, and thus,electrons in the same orbital must have opposite spins.

Suraj Mishra 5 years, 1 month ago

Ye konse chapter m h

ANSWER

How many moles are in 4.4 g of CO2

Posted by Riya Nirala 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Rashmi Rajput 5 years, 1 month ago

No. Of moles = Given mass/molar mass =4.4g/44g =0.1

ANSWER

??????????

Posted by Sahil Malik 5 years, 1 month ago

CBSE > Class 11 > Chemistry

4 answers

Ankit Singh Thakur???? 5 years, 1 month ago

OK repost your question

Chehak .. 5 years, 1 month ago

Repost it..

Shreeya Asthana 5 years, 1 month ago

Repost your question sona

Sahil Malik 5 years, 1 month ago

plzzz mere sbhi questions ka answer do niche likhe h

ANSWER

What is van der waal s radius??

Posted by Ankit Singh Thakur???? 5 years, 1 month ago

CBSE > Class 11 > Chemistry

3 answers

Ankit Singh Thakur???? 5 years, 1 month ago

Thanks shravan ap kon ho

Chehak .. 5 years, 1 month ago

This is ur ans.. Ankit bro

Chehak .. 5 years, 1 month ago

van der Waals radius is a measure for the size of an atom that is not chemically (ionically or covalently) bound. In general a van der Waals radius is defined as half the closest distance of two equal, non-covalently bound, atom

ANSWER

Define octet rule #

Posted by Ankit Singh Thakur???? 5 years, 1 month ago

CBSE > Class 11 > Chemistry

5 answers

Suraj Mishra 5 years, 1 month ago

?

Ankit Singh Thakur???? 5 years, 1 month ago

Thanks sona

Sahil Malik 5 years, 1 month ago

Octet rule: Atoms can combine either by transfer of valence electrons from one atom to another (gaining or loosing) or by sharing of valence electrons in order to have an octet in their valence shells.

Ankit Singh Thakur???? 5 years, 1 month ago

Thanks bro

Gaurav Seth 5 years, 1 month ago

<div style="border:0px; margin:0px; padding:0px; text-align:start; -webkit-text-stroke-width:0px">Octet rule:</div> <div style="border:0px; margin:0px; padding:0px; text-align:start; -webkit-text-stroke-width:0px">

According to the electronic theory of valence, every atom tries to attain the octet configuration (presence of eight electrons) in its valence shell by losing, gaining or sharing of electrons. This is known as the octet rule.
The stable octet can be achieved by the transfer of electrons or by sharing of a pair of electrons between the atoms. In this process, each atom attains a stable outer octet of electrons.

</div>

ANSWER

Telescopic steering

Posted by Snehil J@@T 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Sahil Malik 5 years, 1 month ago

I Hope snehil this Will help U

Sahil Malik 5 years, 1 month ago

Telescopic steering is a device used in GM cars specifically. Cadillac is the primary employer of such a device. Between the wheel and the dash on the steering column is found a metal tab that is the adjusting collar. This collar is attached to a threaded insert that when loosened screws out away from a metal rod that actuates the locking device. It is a fairly simple device. It is never found without the tilt steering option. The reason for such a device is to allow for variance of comfort for any given driver. Cadillacs are all about the "Cruising Comfort" aspect. If a driver has very long legs and has the seat well back they can move the steering wheel closer to the driver and tilt it up and down to maximize the comfort of the driver.

ANSWER

1/6multiply10 ki power -2 How can solve And answer is 16.66

Posted by Ruchi Kumari 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Ruchi Kumari 5 years, 1 month ago

Thanks ?

Rashmi Rajput 5 years, 1 month ago

1/6*0.01=1/0.06=100/6=16.66

ANSWER

limitations of octet rule?

Posted by Sahil Malik 5 years, 1 month ago

CBSE > Class 11 > Chemistry

3 answers

Sahil Malik 5 years, 1 month ago

thanku

Ankit Singh Thakur???? 5 years, 1 month ago

The major limitations of Newlands' law of octaves were : (i) It was applicable to only lighter elements having atomic masses upto 40 u, i.e., upto calcium. After calcium, the first and the eighth element did not have similar properties.

Yogita Ingle 5 years, 1 month ago

<article data-post-id="86502" data-topic-id="69151" data-user-id="10501" id="post_2">

Limitations of octet rule:

The incomplete octet of the central atom.
In some compounds, the number of electrons surrounding the central atom is less than eight.
This is especially the case with elements having less than four valence electrons. Examples are LiCl, BeH₂ and BCl₃.
In a number of compounds of thir period elements, there are more than eight valence electrons around the central atom.
his is termed as the expanded octet. The octet rule does not apply in such cases.
Examples of such compounds are SF₆, H₂SO₄.
The rule is based on inert nature of noble gases. However, some noble gases (for example xenon and krypton) combine with oxygen
and fluorine to form a number of compounds like XeF₂, KrF₂, XeOF₂ etc.

<section> <nav> </nav> </section> <section> </section> </article>

ANSWER

full form of MBPS

Posted by Sahil Malik 5 years, 1 month ago

CBSE > Class 11 > Chemistry

5 answers

Sahil Malik 5 years, 1 month ago

6 bits h, aur profile pr meri pic h... vhi h ya koi aur

Sahil Malik 5 years, 1 month ago

nhi Abhi mne dekha nhi h

Snehil J@@T 5 years, 1 month ago

Aap pe msg aya tha

Snehil J@@T 5 years, 1 month ago

Hii sona mne apko msg kkiya tha mb pr vo aap the kya

Gaurav Seth 5 years, 1 month ago

The Mbps full form is Megabits per Second.

The Mbps full form is Megabits per Second. It is a very common word that we come across in our daily lives. However, either we tend to overlook it or just that it does not matter to us. The vitality of Mbps is so essential in this world where we want faster internet results and surfing. Thus, it is a must for all to know the full meaning of mbps, which is the speed of transferring data. It is one million bits or one thousand kilobits of data that is transferred per second.

ANSWER

What are hybridisation States of each carbon atom in the following compound?

Posted by Somi Bharti 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 5 years, 1 month ago

(i) C-1 is sp² hybridised.

C-2 is sp hybridised.

(ii) C-1 is sp³ hybridised.

C-2 is sp² hybridised.

C-3 is sp² hybridised.

(iii) C -1 and C-3 are sp³ hybridised.

C-2 is sp²hybridised.

(iv) C-1 is sp² hybridised.

C-2 is sp² hybridised.

C-3 is sp hybridised.

(v) C₆H₆ All the 6 carbon atoms in benzene are sp²hybridised.

ANSWER

What is the formula of a compound in which element X forms simple cubic unit cell and Y is present on alternate faces of the unit cell?

Posted by Sahil Sapra 5 years, 1 month ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Line spectrum of hydrogen text book notes formation

Posted by Sumit Chaturvedi 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 5 years, 1 month ago

The lines in the emission spectrum of hydrogen are classified into 5 series. Lyman series, Balmer series, Paschen series, Brackett series and Pfund series.

The first series of lines corresponds to n1 is equal to 1 and n2 equal to 2, 3, 4, and so on. This is known as Lyman series and it appears in the ultraviolet region.

Similarly for Balmer, Paschen, Brackett and Pfund series, n1 =2, 3 , 4 and 5 respectively.

These series lie in different regions.Lyman series lies in the Ultraviolet region. Balmer series lies in the visible region while Paschen, Brackett and Pfund lie in the infrared region.

You can also see our episode on Spectrum where everything is explained with animations.

ANSWER

Na=14.28% S=9.92% H=6.20% O=69.60% Calculate the empirical formula.

Posted by Anna Aniyan 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Mahesh Kumar 5 years, 1 month ago

Empirical formula= Na2SH20O4 Molecular formula= Na2SO4.10H2O

ANSWER

What is the electronic configuration of 118th element?

Posted by Dainashree Mangsatabam 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 5 years, 1 month ago

<th>Classification:</th> <th>Oganesson is a noble gas</th>

Protons:	118
Neutrons in most abundant isotope:	176
Electron shells:	2, 8, 18, 32, 32, 18, 8
Electron configuration:	[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶ (presumed)

ANSWER

Anyone know MB app full form form pls btao

Posted by Snehil J@@T 5 years, 1 month ago

CBSE > Class 11 > Chemistry

2 answers

Sahil Malik 5 years, 1 month ago

matrubharti app yll

Nayanika Mallick 5 years, 1 month ago

Mega bite

ANSWER

What is resonances

Posted by Kavyansh Singhal 5 years, 1 month ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 5 years, 1 month ago

In chemistry,

Resonance is an intramolecular electronic process which involves change in position of Pi bond(s) or non bonding electron ( sometimes sigma bond also) but change of position of any atom occur in this process by changing the position of Pi electrons or non bonding electrons.

ANSWER

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