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

Ask questions which are clear, concise and easy to understand.

Ask Question

Hybrid rocket propallent

Posted by Go Pi 7 years, 9 months ago

3 answers

Pooja Bora 7 years, 9 months ago

It is either a high oxygen containing fuel or compound of fuels plus oxidant , whose combustion takes place in a definite & controlled manner with the evolution of huge volume Of gas.

1Thank You

Lalit Maan 7 years, 9 months ago

rocket with a rocket motor which uses rocket propellants in two different phases. - one solid and the other either gas or liquid

3Thank You

Go Pi 7 years, 9 months ago

Propallant* ayu did you forget me -_- Someone answer thins

2Thank You

ANSWER

why is iodination of benzene difficult

Posted by Singh Vishal 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Aisha Sharma 7 years, 9 months ago

Because I^- tends to convert in I2

1Thank You

ANSWER

Hi I am new student in this course so plzz can u help me to solve my problem

Posted by Muskan Saini 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Pooja Bora 7 years, 9 months ago

Yes why not ...if I know the ans then I'll definitely help u.

0Thank You

ANSWER

Doing ncert questions for organic is enough????????????

Posted by Rida Khan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Sourin Roy 7 years, 9 months ago

Ho sake to exemplar dekh lena

0Thank You

J Ranjan Parida 7 years, 9 months ago

Yes ncert is enough

1Thank You

Pooja Bora 7 years, 9 months ago

Yes, ncert is enough.

0Thank You

ANSWER

An aromatic compound A on treatment with aqueous ammonia and heating from compound B which on heating with Br2 and KOH forms compound C of moluclure formula C6H7N. Write the structure and IUPAC name of compound A, B, C.

Posted by Pradeep Dayal 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Go Pi 7 years, 9 months ago

A benzoIC acid B C6H5(CONH2) C aniline

0Thank You

ANSWER

I want solution of last year question paper 2017

Posted by Anju Chettri 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Go Pi 7 years, 9 months ago

cbse.nic.in

0Thank You

Go Pi 7 years, 9 months ago

Cbse.nice.in

0Thank You

ANSWER

why is ester hydrolysis slow at beginning and then becomes faster

Posted by Smruty Pattnaik 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ruby Bajwa 7 years, 9 months ago

One of the product of ester hydrolysis is carboxylic acid which releases H+ ion and thus acts as auto-catalyst.that's the reason for the process becoming faster in the later stage.

0Thank You

ANSWER

A plant which creates or generates water ...... Or any device which creates artificial water ?..??? CAN chemistry help me ? I want to start mining in asteroids in space ,, will physics help me...... I think NO ? ? sabhi k sabhi kitaboo ko cram kar rahe ha bc ... ? ?

Posted by Lalit Maan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Lalit Maan 7 years, 9 months ago

K karu chemistry ka ..On the way to chd ... Bad words Bc is not bad word....if a person writes bad words that doesn't means he is criminal or a bad person .......believe me.... The silent people can be more dangerous too ? BC - because , BC - Before Christ and BC also represent the way of thinking of a person like behnc**d ...what i say next ?

3Thank You

Lalit Maan 7 years, 9 months ago

? World biggest network - Rodaways ..... A to Z... Each and every person in this world uses rodaway..... Thousands of deaths occurs per day.... Traffic problems ? maintenance problems ? we are spending millions in buying cars and vichles ?..... Now i want to upgrade roadways or roads.... A road without traffic ? no more accidents .... I have vision but bas ek baar 12vi ho jaye uske baad to besak desh chod kar jana pade kiti..... Can't explain on everything on cbseguide ? nobody wants to listen these stuffs i think ? ..... Their are billions of planets in universe ?how to tell everything ? .... Just learn ? one day your childrens will study my theories ??? chlo Chandigarh jau su thodi se vaar m ...pura din kharab jayega bc ? ...

3Thank You

Pooja Bora 7 years, 9 months ago

Ur thought is good . But l think it's not possible.. And last thing don't use bad words in cbse chat.

1Thank You

Go Pi 7 years, 9 months ago

Scope*

1Thank You

Go Pi 7 years, 9 months ago

Out of schope

1Thank You

ANSWER

What is the reason of stability of colloidal sol

Posted by Jyoti Yadv 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ruby Bajwa 7 years, 9 months ago

The stirring effect of Brownian movement is responsible for stability of collidal sol.

0Thank You

ANSWER

Potassium crystallized in a body centred cubic lattice unit cell what is the approx. No. Of unit cell in 4y2k of potassium.

Posted by Afshan Mughal 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ruby Bajwa 7 years, 9 months ago

4y2k??

0Thank You

ANSWER

Why O-nitro phenol is steam volatile but P-Nitro phenol is not?

Posted by Priti Pal 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Go Pi 7 years, 9 months ago

Former is becaus of intramolecular h bonding. Latter it's because of intermolecular h bpnds

0Thank You

ANSWER

Calculate the mass of a non volatile solute (molar mass 40g/mol )which should be dissolved in 114g octane to reduce its vapour pressure to 80%. Iska answer 8g aa rha hai par marking scheme me 10g likh rakha hai. Sample paper 2016 17 question 17

Posted by Pankaj Sihag 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Go Pi 7 years, 9 months ago

[P° - (80/100)p°]/P° = [w2/M2] / {[w1/M1] + [w2/M2]} Final eyations comes as 4w2=40 W2 is 10

0Thank You

Go Pi 7 years, 9 months ago

10g I the right answer I worked out

0Thank You

ANSWER

ok...dii....byeee m 13 ko hi pooch lugiii.....and thanxxx for ur help.....byeee nd best of luck for ur chemistry xam.....???????

Posted by Praveen Kumarharit 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Tyagi 7 years, 9 months ago

Ty n S2u

0Thank You

ANSWER

Chemistry ka kuch nahi aata muze ? Kya karu ?

Posted by Lalit Maan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Lalit Maan 7 years, 9 months ago

Time koni studies k liye ?

2Thank You

Ayushi Tyagi 7 years, 9 months ago

Pdh le or kya krega....

0Thank You

ANSWER

Define *what is Oxygen?*

Posted by Lalit Maan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Lalit Maan 7 years, 9 months ago

A device which creates oxygen...... ? i want to send that on mars

3Thank You

Ayushi Tyagi 7 years, 9 months ago

Oxygen gas cylinder...

1Thank You

Lalit Maan 7 years, 9 months ago

I want a device which generates oxygen ?.... Can anyone help.... ?

2Thank You

J Ranjan Parida 7 years, 9 months ago

It is form of gas which used by us to live

1Thank You

Ayushi Tyagi 7 years, 9 months ago

It is the gas which u need to breathe.....

1Thank You

ANSWER

What is coordination entity

Posted by Neha Tomar 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Tyagi 7 years, 9 months ago

It includes a central metal atom or ion bound by a fixed no of ligands... It is always enclosed in square brackets

0Thank You

ANSWER

Conversion are very hard plzz help me????

Posted by Muskan Saini 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Anushka Kasyap 7 years, 9 months ago

NCERT book padho aur Kuch note banao jaise ki agar ek carbon add/remove krna h to Kya krnge,kisi FG ko add krna h to kaise krenge ,,,aur reaction bar bar padho ,,

0Thank You

J Ranjan Parida 7 years, 9 months ago

Name rtion phele kar lo

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Mt ro..... Pehle name reaction yad kr le

0Thank You

ANSWER

plzzzz Ab bata do koi conversion ki easy trick PLZZZZZZ??????????

Posted by Praveen Kumarharit 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Tyagi 7 years, 9 months ago

13 ko ana... Abhi hm apne ppr ki prprtn kr rhe h...

0Thank You

ANSWER

Hybridization of [Fe(Cl)4]^- and no. Of unpaired electron

Posted by Shruti Mangal 7 years, 9 months ago

CBSE > Class 12 > Chemistry

10 answers

J Ranjan Parida 7 years, 9 months ago

Okk

0Thank You

J Ranjan Parida 7 years, 9 months ago

Geometry tetrahedral

0Thank You

J Ranjan Parida 7 years, 9 months ago

To phir sp^3 aayega

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Koi na bs ppr me dhyan se dekhiyo... Ok

1Thank You

J Ranjan Parida 7 years, 9 months ago

Ohh sry yrr cl hai kya mujhe cn laga sry yrr

0Thank You

Ayushi Tyagi 7 years, 9 months ago

CN ni h Cl h jr

0Thank You

J Ranjan Parida 7 years, 9 months ago

CN IS strong ligand pair will occur...

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Jr ye dsp2 ho hi ni skta sirf 4 Cl- h..... Dhyan se dekh

1Thank You

J Ranjan Parida 7 years, 9 months ago

Ans is hybridization is dsp^2, paramagnetic in nature as presence of one unpaired electron and the geometry will be square planner...

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Hybridization :sp3..... e- :5

1Thank You

ANSWER

diii nd Bhaiya.....my self megha Singh...nd I m frm class xi......PLZZZZZZ koi easy trick....batao na conversion ki plzzzzzzz......mera xam h 17 ko plzzzzz batao na??????????

Posted by Praveen Kumarharit 7 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Ayushi Tyagi 7 years, 9 months ago

To aisa kr 13 ko hi puchiyo.... Pehle bio pd le... Ok tb m bta dungi

0Thank You

J Ranjan Parida 7 years, 9 months ago

Tera prprtn ho gya kya ic tu usko bata rhi h

0Thank You

Praveen Kumarharit 7 years, 9 months ago

Sry di WO mera xm h n 13 ko bio ko to tyyari kr rhi thi

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Kl jb bta rhe the to kha chli gyi thi?

0Thank You

ANSWER

What modification can u suggest in the hardy Schulz law...

Posted by Alisha Bisht 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Tyagi 7 years, 9 months ago

When 2 oppositely charged sols r mixd in prpr proportions 2 neutralise each other's charge, then mutual coagulation of both the sols occur

1Thank You

ANSWER

Define with example. Hybrid rocket propellants

Posted by Go Pi 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Go Pi 7 years, 9 months ago

Say yaar

0Thank You

Go Pi 7 years, 9 months ago

Chemistry in everydaylife . Its better if quoted from book

0Thank You

Ayushi Tyagi 7 years, 9 months ago

It's from which chapter?

0Thank You

ANSWER

Is anyone here from studyhall lucknow

Posted by Rahul Mane 7 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Write the formula of the compound of phosphorus which is obtained when conc.HNO3 oxidises P4

Posted by Uttam Kumar 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Ruby Bajwa 7 years, 9 months ago

H3PO4. pg.175

0Thank You

Go Pi 7 years, 9 months ago

PG 175 4th et. fROM top

1Thank You

ANSWER

How to complete p block in minimum time?

Posted by Sonakshi Nayak 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Pooja Bora 7 years, 9 months ago

Agar ishse acha koi tarika h to plz suggested me also..??

1Thank You

Pooja Bora 7 years, 9 months ago

Only ncert exercise kr lo clear ho jyega concept bhi or Q bhi ....mushkil se 2 hr lagenge!

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Sm1 plz tell this 2 me as well

0Thank You

ANSWER

1.13

Posted by Md Shazeb 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ruby Bajwa 7 years, 9 months ago

If from exercises then. firstly calculate a from formula by putting values of d, Z,atomic mass and Avogadro's number in d= zM/a^3 NA Then put a in formula √3/4 a u will get r.

0Thank You

ANSWER

How to differentiate between two compound

Posted by Rahul Mane 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Tyagi 7 years, 9 months ago

Using distinctions

0Thank You

ANSWER

Linear branch cross-linked polymer ka definition

Posted by J Ranjan Parida 7 years, 9 months ago

CBSE > Class 12 > Chemistry

10 answers

Ayushi Tyagi 7 years, 9 months ago

Don't feel bad gopika... Maybe he didn't undrstnd ur ans

0Thank You

Go Pi 7 years, 9 months ago

Jr -_- unfair injst partial

1Thank You

Ayushi Tyagi 7 years, 9 months ago

Wlcm jr

0Thank You

J Ranjan Parida 7 years, 9 months ago

Thanks ic

0Thank You

Ayushi Tyagi 7 years, 9 months ago

*chain.......... Cross - linked :in these, linear chains r joind tgthr to form a 3-D network structure

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Linear polymers :in these polymers, the monomers r joined tgthr 2 form long, straight chains of polymer molecules............... Branched polymers :in these monomer units cmbyn 2 form linear chain as well as branches of different lengths along the main chai

1Thank You

Go Pi 7 years, 9 months ago

polymer with linear chain branches. Eg. high density polyethNE polymers former by bi FuN. or tri function monomer and contain strong civalent bond between various liner polymer chains. eg bakelite

0Thank You

J Ranjan Parida 7 years, 9 months ago

Okk

0Thank You

Ayushi Tyagi 7 years, 9 months ago

Thodi der bad btaungi..

0Thank You

J Ranjan Parida 7 years, 9 months ago

Are yrr koi idhar bhi ans de do

2Thank You

ANSWER

Chemistry mei paper kis level ka aata h.. I mean easy ya hard..