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

1Thank You

Ayushi Tyagi 8 years ago

Ye ni pucha jata

0Thank You

ANSWER

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

Posted by Praveen Kumarharit 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 8 years ago

Raat le ladle

0Thank You

ANSWER

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

Posted by Anuj Chaudhary 8 years ago

CBSE > Class 12 > Chemistry

1 answers

J Ranjan Parida 8 years ago

Bhai pata h mujhe

0Thank You

ANSWER

Transition metals show variable oxidation states

Posted by Tanya Bisen 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 8 years 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

0Thank You

ANSWER

Friends organic pa jada dhan da .

Posted by Anuj Chaudhary 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

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

Posted by Ramanjit Kaur 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Tyagi 8 years ago

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

1Thank You

ANSWER

Friends 12 k bad kon sa course loga.

Posted by Anuj Chaudhary 8 years ago

CBSE > Class 12 > Chemistry

7 answers

Alisha Bisht 8 years ago

Biotech....

0Thank You

Ayushi Tyagi 8 years ago

Me too

0Thank You

Abhinay Ab 8 years ago

I m appearing for jee mains this year.

0Thank You

Abhinay Ab 8 years ago

B-tech from mech or elect.

0Thank You

Anuj Chaudhary 8 years ago

Gud

0Thank You

J Ranjan Parida 8 years ago

I will fill enterance form for IMUCET

0Thank You

Ayushi Tyagi 8 years ago

Chemical engineering

0Thank You

ANSWER

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

Posted by Lavish Tyagi 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Prince Jaat 8 years ago

Ok bhai Lavish

0Thank You

Lavish Tyagi 8 years ago

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

0Thank You

Prince Jaat 8 years ago

Thik pedh le Tye ale

0Thank You

ANSWER

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

Posted by Shefali Mourya 8 years ago

CBSE > Class 12 > Chemistry

1 answers

J Ranjan Parida 8 years ago

Yes every cell is imp ...

1Thank You

ANSWER

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

Posted by Baani N 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Baani N 8 years ago

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

0Thank You

J Ranjan Parida 8 years ago

Ya mechanism is also there

1Thank You

J Ranjan Parida 8 years ago

Name reaction chemical test iupac naming conversion...m

2Thank You

Sidharth Verma 8 years ago

Mechanism

1Thank You

ANSWER

Moles formula

Posted by Akash Saini 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Sidharth Verma 8 years ago

Given wight upon molecular formula for no. Of moles

1Thank You

ANSWER

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

Posted by Monika Chauhan 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Prince Jaat 8 years ago

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

1Thank You

Sidharth Verma 8 years ago

In pradeep NCERT Sol.

0Thank You

Arpita Mahata 8 years ago

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

1Thank You

ANSWER

Why Glucose and Fructose hive same osazone?

Posted by Arpita Mahata 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 8 years 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

1Thank You

ANSWER

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

Posted by G Jagdish Chouhan 8 years ago

CBSE > Class 12 > Chemistry

5 answers

Alisha Bisht 8 years ago

Coordination compound bacha h mera to

0Thank You

J Ranjan Parida 8 years ago

Bhai 3 chapters are left

0Thank You

Prince Jaat 8 years ago

Ho zye mera

0Thank You

Sidharth Verma 8 years ago

13 chapter

0Thank You

Prince Jaat 8 years ago

Mera ho zye

0Thank You

ANSWER

Garbiel reaction is imp

Posted by J Ranjan Parida 8 years ago

CBSE > Class 12 > Chemistry

7 answers

Rochie Kudi 8 years ago

0Thank You

J Ranjan Parida 8 years ago

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

0Thank You

Rochie Kudi 8 years ago

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

0Thank You

J Ranjan Parida 8 years ago

Kisne kha app logo se assa

0Thank You

J Ranjan Parida 8 years ago

Nhi to

0Thank You

Rochie Kudi 8 years ago

J tu to blk ho gya tha na

0Thank You

Sidharth Verma 8 years ago

Yes

0Thank You

ANSWER

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 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aryan Shukla 8 years 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 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Lopaz Lucka 8 years ago

Na-11 & Ga-31

0Thank You

Prince Jaat 8 years ago

Na=11 and Ga=31 in general state

1Thank You

Rochie Kudi 8 years ago

Sodium ir gallium hi btaenge ..

1Thank You

ANSWER

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

Posted by Priya Prakash S 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aryan Shukla 8 years ago

Presence of bulky tertiary butyl group decreases the rate of rxn

1Thank You

ANSWER

What is Brownian movement

Posted by Lopaz Lucka 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Physics Lover Girl 8 years ago

Zigzag movement shown by colloidal particles

1Thank You

Rochie Kudi 8 years ago

Zig zag movement of colloidal particles.

1Thank You

ANSWER

What is the the IUPAC name of Buna-S

Posted by Sachidanandanarayan Sachidanandanarayan 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 8 years ago

1,3-butadiene

1Thank You

ANSWER

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

Posted by Utkarsh Singh 8 years ago

CBSE > Class 12 > Chemistry

9 answers

Prince Jaat 8 years ago

Glass to Amorphous solid hi hota hai

1Thank You

G Jagdish Chouhan 8 years ago

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

0Thank You

Rochie Kudi 8 years ago

To bhn mne bhi y pdha h islie kha h

0Thank You

G Jagdish Chouhan 8 years ago

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

0Thank You

Rochie Kudi 8 years ago

U can chk it on the nt ..

0Thank You

Rochie Kudi 8 years ago

Hanji maam glass is an amorphous form of sio2..

0Thank You

G Jagdish Chouhan 8 years ago

,"amorphous solid" solid kaise flow karega ?

0Thank You

G Jagdish Chouhan 8 years ago

Bz glass is an supercooled liquid which flows down with time

0Thank You

Rochie Kudi 8 years ago

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

1Thank You

ANSWER

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

Posted by Lalit Maan 8 years ago

CBSE > Class 12 > Chemistry

7 answers

Rochie Kudi 8 years ago

Mama lge h mere

0Thank You

Rochie Kudi 8 years ago

0Thank You

Rochie Kudi 8 years ago

Bye

0Thank You

Lalit Maan 8 years ago

Chlo bye

1Thank You

Rochie Kudi 8 years ago

Shi kh rha

0Thank You

Rochie Kudi 8 years ago

R u sure and firm.

0Thank You

Lavish Tyagi 8 years ago

thik hai

1Thank You

ANSWER

Why nacl is ionic

Posted by Rijul Garg 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 8 years ago

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

0Thank You

ANSWER

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

Posted by Shubham Verma 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 8 years 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.

0Thank You

ANSWER

Protonation of phenol is difficult then ethanol

Posted by Deversh Khandelwal 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 8 years 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

1Thank You

ANSWER

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

Posted by Ankitha Ganga 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Prince Jaat 8 years 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 8 years ago

numerical maaf kro

0Thank You

ANSWER

what is glycosidic linkage?

Posted by Jay Das 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Rochie Kudi 8 years ago

Kuuu kuuuuu

0Thank You

Lavish Tyagi 8 years ago

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

0Thank You

Madiha Faraz 8 years ago

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

1Thank You

Prince Jaat 8 years 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

2Thank You

ANSWER

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

Posted by Lavish Tyagi 8 years ago

CBSE > Class 12 > Chemistry