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Please anybody tell me what is nuclear charge . Or what is effective nuclear charge?? I am little bit confused ?❓

Posted by Prakhar Jadaun ? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

5 answers

Kratos Jskfkg 6 years, 11 months ago

Prakhar j mai Aatray ???

Nancy Rajput 6 years, 11 months ago

welcome

Nancy Rajput 6 years, 11 months ago

hopes it help u?

Nancy Rajput 6 years, 11 months ago

Nucleus contains positive charged protons. The force of attraction of between positive charge nucleus and negative charged electrons present in outermost shell is callednuclear charge/ force. If inner extra electrons/ orbitals are present between nucleus and valence electrons, then the nuclear charge is calledeffective nuclear chargeor nuclear pull. With increase in protons, positive charge increases hence, hence nuclear charge increases

Nancy Rajput 6 years, 11 months ago

The effective nuclear charge is the net charge an electron experiences in an atom with multiple electrons. Higher energy electrons can have other lower energy electrons between the electron and the nucleus, effectively lowering the positive charge experienced by the high energy electron.

ANSWER

When "Alklidene group " is used ? with IUPAC name or with common name

Posted by Mukul ......... 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar Jadaun ? 6 years, 11 months ago

Suppose if we have a parent chain and a CH3 group attached to it then we name it as methyl....but when double bond is not taken in parent chain then that CH3 is changed to CH2 then we call it as "methyledene" or" Methylene "...........or if u dont understand so suppose a parent chain started with a double bond and ended with a double bond and also a carbon is combined to it with double bond ( =CH2 with parent chain) . This is an alklidene group we name its member as 1. Methyledene, ethyledene etc.

ANSWER

Plz explain Hydration enthalpy.....in easy way....???

Posted by Yakshi ? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

5 answers

Rea Rea 6 years, 11 months ago

Amount of energy required to 1 mole of ion with water

Yakshi ? 6 years, 11 months ago

Thanks .....

Ankit Singh 6 years, 11 months ago

The heat energy released when new bonds are made between the ions and water molecules is known as the hydration enthalpy of the ion. The hydration enthalpy is the enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution. Hydration enthalpies are always negative. Hope this will help u yakshi ?

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 6 years, 11 months ago

Well it the amount of energy released when 1mole of gaseous ions combine with water to form hydrated ions...the hydration enthalpies of alkaline earth metal ions are larger than those of alkali earth metal ion.. ✌️

Nancy Rajput 6 years, 11 months ago

The change in enthalpy (the amount of heat released) when one mole of gaseous ions form hydrated ions under standard conditions is called hydration enthalpy.

ANSWER

Cbse just added nitrogen family and solid state in our course when will you add these topics in 11th class coursr

Posted by Harsh Piwhal 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

♥️Bhavika Naik?? 6 years, 11 months ago

Ya...i know cbse added solid states...but nitrogen family too??

Aman Kumar 6 years, 11 months ago

Yes...cbseguide plz add these chapter immediately...if possible?????

ANSWER

0.0.246g of an organic compound gave on combustion 0.198g of co2 and 0.1014g of water vapour. Calculate the percentage of carbon

Posted by Ram Kumar 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

explain in detail about molarity , molality , and normality??

Posted by Itss Me Jippo 6 years, 11 months ago

CBSE > Class 11 > Chemistry

7 answers

Aman Kumar 6 years, 11 months ago

Oooo...then its good?

Itss Me Jippo 6 years, 11 months ago

Mere exams ongoing hai and i was just revising the topics

Prakhar Jadaun ? 6 years, 11 months ago

Normality is number of mole equivalents per liter of solution.

Prakhar Jadaun ? 6 years, 11 months ago

Molality (m) is defined as the number of moles of solute per kilogram of solvent. molality = moles of solute/kilograms of solvent.

Prakhar Jadaun ? 6 years, 11 months ago

Molarity (M) is the concentration of a solution expressed as the number of moles of solute per liter of solution

Aman Kumar 6 years, 11 months ago

By the way don't mind but,...I want to ask that session khatam hone ko hai ....and u want the explaination of these topics..??

Aman Kumar 6 years, 11 months ago

Just go to the revision notes section of chemistry of that chapter in this app ...u will definitely get better outcome...

ANSWER

What is limiting reagent? Explain with example.

Posted by Itss Me Jippo 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Kratos Jskfkg 6 years, 11 months ago

Prakhar is right

Prakhar Jadaun ? 6 years, 11 months ago

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 complete.

ANSWER

What is the general formula for aromatic hydrocarbons

Posted by Durgesh Niket 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar Jadaun ? 6 years, 11 months ago

Since aromatic hydrocarbons are also known as arenes. So, general formula of arenes is C(n)H(2n-6y), where y is the number of cyclic rings in the arene.

ANSWER

What is organic reaction mechanism

Posted by Littleshine Aaaru?? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 11 months ago

Reaction mechanism involves breaking and forming bonds, movement of electrons and rate follows sequential description of rate of reaction.
A covalent bond can get cleaved either by homolytic cleavage (or) by heterolytic cleavage. In homolytic cleavage a bond breaks in such a way that each broken part gets one of the two bonded electrons.
Homolytic cleavage results in the formation of neutral atoms (or) groups with one unpaired electron. These are known as free radicals. The free radicals thus formed are highly reactive due to the presence of unpaired electrons.

ANSWER

Which substance has highest composition in acid rain?

Posted by Rea Rea 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Itss Me Jippo 6 years, 11 months ago

Sulphates and nitrates

ANSWER

Mole is si unit of

Posted by Abhijeet Singh 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Abhishek Prasad 6 years, 11 months ago

Amount of substance

Littleshine Aaaru?? 6 years, 11 months ago

Amount of substance

ANSWER

Properties of Aromatic compounds.

Posted by Ankit Raj 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Prakhar Jadaun ? 6 years, 11 months ago

Shows addition and substitution reaction at once

Shyam Kishan Yadav 6 years, 11 months ago

Sp2 hybridised , (4n+2)pie e-, one plannar, cyclic

ANSWER

On the basis of quantum numbers justify that the sixth period of the periodic table should have 32 elements.

Posted by Shreya Singh 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 11 months ago

In the periodic table each period begins with the filling of principal quantum number (n). The value ofnfor the sixth period is 6. Forn= 6, azimuthal quantum number (l) can have values of 0, 1, 2, 3, 4. In the 6thperiod, electrons can be filled in only 6s, 4f, 5d,and 6psubshells. Now, 6shas one orbital, 4fhas seven orbitals, 5dhas five orbitals, and 6phas three orbitals. Therefore, there are a total of sixteen (1 + 7 + 5 + 3 = 16) orbitals available. According to Pauli’s exclusion principle, each orbital can accommodate a maximum of 2 electrons. Thus, 16 orbitals can accommodate a maximum of 32 electrons. Hence, the sixth period of the periodic table should have 32 elements.

ANSWER

What is E° value.....actually it is in chapter redox.....jo abi tak mera nai hua.....so...plz explain in easy way....???

Posted by Yakshi ? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Ankit Singh 6 years, 11 months ago

Answer thik hai na yakshi

Ankit Singh 6 years, 11 months ago

Hope this will helpu if u any doubt in this please ask me

Ankit Singh 6 years, 11 months ago

Electrons are able to move between electrodes because the chemical reaction is a redox reaction. A redox reaction occurs when a certain substance is oxidized, while another is reduced. During oxidation, the substance loses one or more electrons, and thus becomes positively charged. E° cell = E° cathode - E° anode Where E° value represents the standard reduction potential of the electrode

ANSWER

Why CH2 double bond CH2 is more reactive than CH triple bond CH ?

Posted by Ayushi Ayushi 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Itss Me Jippo 6 years, 11 months ago

Because of presence of one sigma and one pi bond in CH2 double bonds and one sigma and two pi bonds in CH triple bonds. We can whole conclude that pi bonds are the weakest bonds and it plays a major in more reactiveness and less reactiveness as CH2 double bond and CH triple bonds .

Nancy Rajput 6 years, 11 months ago

and is much stable

Nancy Rajput 6 years, 11 months ago

as per priority order double bond is reactive as compsred tk triple

ANSWER

Why standard heat of formation of diamond is not zero though it is an element

Posted by Vipul Rawat 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

The sulphur estimation 0.157 gm of an estimation compound gave 0.4813 of BaSO4. What is percentage of sulphur in compound molar mass BaSO4 233 gm per mole ?

Posted by Rohit Ramani 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 6 years, 11 months ago

First we have to calculate Molecular mass of BaSO4 which is 233 g/mol...... now 233 g BaSO4 contain 32 g of sulphur..... therefore 0.4813 BaSO4 contain ➡️32 /233× 0.4813 g of sulphur.... nd by calculating above eq. u get 0.066g of sulphur .... now find we have to find %of sulphur.. so % = 0.066/0.157 ×100 = 42.1%.......

ANSWER

what are fused halides?

Posted by Mini Azad 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Sandeep Yadav 6 years, 11 months ago

Metal halides when found in fused or molten state they are called as fused halide like molten sodium chloride is a fused halide

ANSWER

How to determine the oxidation number

Posted by Ajay Maurya 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Ankit Singh 6 years, 11 months ago

Rules are must without rules u get confused infinding on

Yakshi ? 6 years, 11 months ago

There are certain rules ......so u have to read all the rules from redox chapter......from ncert ......if u will get any confusion then u can take help of youtube or we will help u

ANSWER

Sir what is the suffix of acid halide

Posted by Shubham Chouhan 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Bhaumik Pandey 6 years, 11 months ago

Oyl halide

ANSWER

Sir in class xi in annual exam whole syllabus will come or half portion will come..

Posted by Anshil Gupta Xii 6 years, 11 months ago

CBSE > Class 11 > Chemistry

5 answers

Priya Dharshini ? 6 years, 11 months ago

Whole syllabus will come.100% full book is going to come in all annual exams for all classes

Ankit Singh 6 years, 11 months ago

Apne sahi bat bola

Yakshi ? 6 years, 11 months ago

Whole syllabus.......because 11th class mein aapko 12th class ke liye prepare kiya jaata hai isliye complete syllabus aayega taaki 12th mein course learn krney mein bachho ko problem naah ho

Aman Kumar 6 years, 11 months ago

Depends on school

Nishita Tomar 6 years, 11 months ago

whole syllabus

ANSWER

Why size of action is always smaller than that of its neutral atom

Posted by Himanshu Lamba 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar Jadaun ? 6 years, 11 months ago

Because :- 1. They have less electrons than parent atom since nuclear charge remains the same. So they are tightly held by the nucleus due to which the atomic size decreases. 2. Also , as electron decreases the shielding effect ( electron - electron repulsion) decreases , due to this also cation is always smaller than its parent atom.

ANSWER

What is carcinogenecity

Posted by Devansh Bhadana 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar Jadaun ? 6 years, 11 months ago

Ability of a carcinogen to produce invasive cancer cells from normal cells.

ANSWER

Anyone have chemistry pt3 paper of class11 kvs

Posted by Arpit Sahu 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Ankit Singh 6 years, 11 months ago

Yes please

Aman Kumar 6 years, 11 months ago

Do you have ???....if yes then give me.....if anyone have then he/she can also give here....

Shreeraj N K 6 years, 11 months ago

S with me

ANSWER

Eqillibrium , thermod , hydrogen & solid states ke imp points/concepts ka hai❓

Posted by ♥️Bhavika Naik?? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

♥️Bhavika Naik?? 6 years, 11 months ago

Haan ji

Rohit Gupta 6 years, 11 months ago

Bhavika ???

ANSWER

Write expression for kp and kc for the decomposition reaction of calcium carbonate

Posted by Ramneet Sekhon 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Aditya Wagh 6 years, 11 months ago

Caco3 decomposes as CaCO3----->CaO+CO2 So,∆n=1 Therefore, Kp=kc(RT)

ANSWER

How dissociation constant of a weak acid is related to its degree of dissociation

Posted by Ramneet Sekhon 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How many spherical nodes do you expect in a 4s-orbital?

Posted by Naved Khan 6 years, 11 months ago

CBSE > Class 11 > Chemistry

3 answers

Ankit Singh 6 years, 11 months ago

Good answer nancy

Nancy Rajput 6 years, 11 months ago

no of spherical nodes = (n-1) nodes =4-1 =3

Nancy Rajput 6 years, 11 months ago

3 nodes

ANSWER

What is the pH of 0.001M HNO3 solution?

Posted by Ramneet Sekhon 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Nancy Rajput 6 years, 11 months ago

its 3

ANSWER

If the partial pressure are taken in atmosphere then what is the value of R?

Posted by Ramneet Sekhon 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Tom Mathew 6 years, 11 months ago

0.0821

ANSWER

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