CBSE > Class 12 > Chemistry | CBSE Board | Homework Help

Density doesn't follow a particular order as depends on volume and the mass. As we go down, mass of an atom will increase and the volume of atom increase. So it depends on which dominates for the given elements

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Ayushi Tyagi 7 years, 9 months ago

Ye ni pucha jata

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Bhaiya nd dii koi conversion ki easy trick bata do n plzz???????????

Posted by Praveen Kumarharit 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Raat le ladle

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Organic m mechanism jaror kar la..... mechanism is most important because 3 marks....

Posted by Anuj Chaudhary 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

J Ranjan Parida 7 years, 9 months ago

Bhai pata h mujhe

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Transition metals show variable oxidation states

Posted by Tanya Bisen 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

The transition metals have there valence electrons in (n-1)d and ns orbitals. Since, there is very little energy difference between these orbitals, both energy levels can be used for bond formation. Thus, transition elements exhibit variable oxidation states

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Friends organic pa jada dhan da .

Posted by Anuj Chaudhary 7 years, 9 months ago

CBSE > Class 12 > Chemistry

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ANSWER

Why doez urea has sharp melting pt. but glass has not??

Posted by Ramanjit Kaur 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Tyagi 7 years, 9 months ago

Urea is a crystalline solid thereby having high melting point whereas glass is amorphous

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Friends 12 k bad kon sa course loga.

Posted by Anuj Chaudhary 7 years, 9 months ago

CBSE > Class 12 > Chemistry

7 answers

Alisha Bisht 7 years, 9 months ago

Biotech....

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Ayushi Tyagi 7 years, 9 months ago

Me too

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Abhinay Ab 7 years, 9 months ago

I m appearing for jee mains this year.

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Abhinay Ab 7 years, 9 months ago

B-tech from mech or elect.

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Anuj Chaudhary 7 years, 9 months ago

Gud

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J Ranjan Parida 7 years, 9 months ago

I will fill enterance form for IMUCET

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Ayushi Tyagi 7 years, 9 months ago

Chemical engineering

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thik h fer may to 4 hours bhut ache padne k bad ata ho

Posted by Lavish Tyagi 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Prince Jaat 7 years, 9 months ago

Ok bhai Lavish

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Lavish Tyagi 7 years, 9 months ago

thik hai prince bhai milte hai fer 4 to 5 hours bad

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Prince Jaat 7 years, 9 months ago

Thik pedh le Tye ale

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ANSWER

Kya electrochemistry ke saare cells important h ??koi bata do

Posted by Shefali Mourya 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

J Ranjan Parida 7 years, 9 months ago

Yes every cell is imp ...

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What's imp.in aldehyde and amine chapter.how should i prepare these chapters

Posted by Baani N 7 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Baani N 7 years, 9 months ago

Iss app m jo notes diye h are they enough for these chapters

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J Ranjan Parida 7 years, 9 months ago

Ya mechanism is also there

1Thank You

J Ranjan Parida 7 years, 9 months ago

Name reaction chemical test iupac naming conversion...m

2Thank You

Sidharth Verma 7 years, 9 months ago

Mechanism

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ANSWER

Moles formula

Posted by Akash Saini 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Sidharth Verma 7 years, 9 months ago

Given wight upon molecular formula for no. Of moles

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ANSWER

Copper is regarded as transition metal though it has completely filled d-orbital(d10) explain

Posted by Monika Chauhan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Prince Jaat 7 years, 9 months ago

Because in the excited state Cu has an incomplete D orbital and is thus a transition element

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Sidharth Verma 7 years, 9 months ago

In pradeep NCERT Sol.

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Arpita Mahata 7 years, 9 months ago

Copper exhibits +2 oxidation state wherein it has incompletely filled d orbital(3d9) . Hennce called as transiston metal.

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Why Glucose and Fructose hive same osazone?

Posted by Arpita Mahata 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Glucose and fructose differ in their structer at 1st two carbon atom c1 and c2 only.In osazone formation tthere two carbon atoms take part in the reaction and during osazone formation the structural dissimilarities at c1 and c2 disapears .Hense they give same osazone

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ANSWER

Sabka Sara syllabus ho gaya kya.....??

Posted by G Jagdish Chouhan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Alisha Bisht 7 years, 9 months ago

Coordination compound bacha h mera to

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J Ranjan Parida 7 years, 9 months ago

Bhai 3 chapters are left

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Prince Jaat 7 years, 9 months ago

Ho zye mera

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Sidharth Verma 7 years, 9 months ago

13 chapter

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Prince Jaat 7 years, 9 months ago

Mera ho zye

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ANSWER

Garbiel reaction is imp

Posted by J Ranjan Parida 7 years, 9 months ago

CBSE > Class 12 > Chemistry

7 answers

Rochie Kudi 7 years, 9 months ago

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J Ranjan Parida 7 years, 9 months ago

Nhi me yhi hu okk don't get confuse...okk

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Rochie Kudi 7 years, 9 months ago

Are niche teri gardn vale qs.p likha hua h dkh.

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J Ranjan Parida 7 years, 9 months ago

Kisne kha app logo se assa

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J Ranjan Parida 7 years, 9 months ago

Nhi to

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Rochie Kudi 7 years, 9 months ago

J tu to blk ho gya tha na

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Sidharth Verma 7 years, 9 months ago

Yes

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What happen when 1. 2,4,6 -trinitrochlorobenzene is treated with warm water 2. 2-chlorobutane is treated with alcoholic koh. 3 ethyl chloride is treated with Na metal in presence of dry ether.

Posted by Himanshu Kumar 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Aryan Shukla 7 years, 9 months ago

Try urself I'm just naming them 1 substitution aromatic 2 E2 3 wurtz If ur unable then revise again

1Thank You

ANSWER

How many electrons are there in sodium and gallium ?

Posted by Gurpreet Singh 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Lopaz Lucka 7 years, 9 months ago

Na-11 & Ga-31

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Prince Jaat 7 years, 9 months ago

Na=11 and Ga=31 in general state

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Rochie Kudi 7 years, 9 months ago

Sodium ir gallium hi btaenge ..

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ANSWER

Why Neo-pentyl bromide undergo nucleophilic substitution reaction very slowly??

Posted by Priya Prakash S 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Aryan Shukla 7 years, 9 months ago

Presence of bulky tertiary butyl group decreases the rate of rxn

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ANSWER

What is Brownian movement

Posted by Lopaz Lucka 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Physics Lover Girl 7 years, 9 months ago

Zigzag movement shown by colloidal particles

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Rochie Kudi 7 years, 9 months ago

Zig zag movement of colloidal particles.

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ANSWER

What is the the IUPAC name of Buna-S

Posted by Sachidanandanarayan Sachidanandanarayan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

1,3-butadiene

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ANSWER

Why does the window glass of old building is thicker at the bottom?

Posted by Utkarsh Singh 7 years, 9 months ago

CBSE > Class 12 > Chemistry

9 answers

Prince Jaat 7 years, 9 months ago

Glass to Amorphous solid hi hota hai

1Thank You

G Jagdish Chouhan 7 years, 9 months ago

name wahi answer karna h Jo NCERT mein likha h??

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Rochie Kudi 7 years, 9 months ago

To bhn mne bhi y pdha h islie kha h

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G Jagdish Chouhan 7 years, 9 months ago

I didn't mean that rochie maine to bas wahi kaha jo meine padha??

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Rochie Kudi 7 years, 9 months ago

U can chk it on the nt ..

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Rochie Kudi 7 years, 9 months ago

Hanji maam glass is an amorphous form of sio2..

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G Jagdish Chouhan 7 years, 9 months ago

,"amorphous solid" solid kaise flow karega ?

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G Jagdish Chouhan 7 years, 9 months ago

Bz glass is an supercooled liquid which flows down with time

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Rochie Kudi 7 years, 9 months ago

As glass is amorphous soliid so it has tendency to flow.

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ANSWER

Mission 15 hours ?..... Just 15hours study for chemistry... Starting from 4pm today...

Posted by Lalit Maan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

7 answers

Rochie Kudi 7 years, 9 months ago

Mama lge h mere

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Rochie Kudi 7 years, 9 months ago

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Rochie Kudi 7 years, 9 months ago

Bye

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Lalit Maan 7 years, 9 months ago

Chlo bye

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Rochie Kudi 7 years, 9 months ago

Shi kh rha

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Rochie Kudi 7 years, 9 months ago

R u sure and firm.

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Lavish Tyagi 7 years, 9 months ago

thik hai

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Why nacl is ionic

Posted by Rijul Garg 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Becoz it dissociates in Na+ and Cl- in Electrolytic solution or in aqueous solution

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bond enthalpy of flourine is lower than that of chlorine, why?

Posted by Shubham Verma 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Florine molecule is small and has 3 lone pairs there is great repultion among them.other halogens have vacant d orbitals to keep their lone pair so there is not much flurine molecule breaks easily.BDE=Cl2>Br2>F2.

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Protonation of phenol is difficult then ethanol

Posted by Deversh Khandelwal 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Protonation refers to addition of H+ to oxygen of OH group. It is easier when O has more electron density, i.e. when nucleophilic character of O is more. In alcohols the electron density on oxygen is high due to localization of its lone pair and electron donating nature of alkyl group. So their protonation is easy. However in phenols, the lone pair of oxygen is in resonance with the benzene ring and thus is delocalized. So protonation of phenols is difficult. Yrr

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Determine the type of cubic lattice if edge length is 290pm, density 7.8g molar mass 56g

Posted by Ankitha Ganga 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Prince Jaat 7 years, 9 months ago

d=ZM/a3×avegadro number Z=a3×d×avegadro number/M= 2.03 So it is bcc crystal lattice because value of z for bcc is 2.

2Thank You

Lavish Tyagi 7 years, 9 months ago

numerical maaf kro

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what is glycosidic linkage?

Posted by Jay Das 7 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Rochie Kudi 7 years, 9 months ago

Kuuu kuuuuu

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Lavish Tyagi 7 years, 9 months ago

rochie ko nya friend mil gya lagta hai.....

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Madiha Faraz 7 years, 9 months ago

The 2 monosaccharides are joined together by an oxide linkage formed by the loss of water molecule

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Prince Jaat 7 years, 9 months ago

a glycosidic bond or glycosidic linkage is a type of covalent bond that joins a carbohydrate (sugar) molecule to another group, which may or may not be another carbohydrate

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kon h vo mhan jisne organic ache se kar le use mere samne lya jay

Posted by Lavish Tyagi 7 years, 9 months ago

CBSE > Class 12 > Chemistry