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

First of all convert propene to bromopropane by reaction with HBr in presence of peroxide ( Anti markovnikov) . Then hydrolysis of bromo propane with KOH will yield the required product. ( Propan-1-ol)

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ANSWER

Write the mechanism of acid dehydration of ethanol to yield ethene.

Posted by Kamlesh Kumar 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 6 years, 5 months ago

The mechanism of acid dehydration of ethanol to yield ethene involves the following three steps:
Step 1:
Protonation of ethanol to form ethyl oxonium ion:

Step 2:
Formation of carbocation (rate determining step):

Step 3:
Elimination of a proton to form ethene:

The acid consumed in step 1 is released in
Step 3. After the formation of ethene, it is removed to shift the equilibrium in a forward direction.

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ANSWER

Find the bioling point of a solution containing 0.520gm of glucose (molar mass =180) dissolve in 80.2gm of water. (given kb for water =0.52k/m).

Posted by Kamlesh Kumar 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 6 years, 5 months ago

Given, w_B = 0.520 g, w_A = 80.2 g,
{tex}K_b = 0.52 \;{Km}^{-1}{/tex}
{tex}{M_2}({C_6}{H_{12}}{O_6}) = (6 \times 12 )+( 12 \times 1) +( 6 \times 16){/tex}
{tex}= \,180\,g\,mo{l^{ - 1}}{/tex}
{tex}\Delta {T_b} = \frac{{{K_b} \times {w_B} \times 1000}}{{{M_B} \times {w_A}}}{/tex}
{tex} = \frac{{0.52K{m^{ - 1}} \times 0.520g \times 1000g\,kg{\,^{ - 1}}}}{{180\,g\,mo{l^{ - 1}} \times 80.2g}}{/tex}
{tex}\Delta {T_b} = 0.0187K{/tex}
Boiling point of solution {tex}({{\rm{T}}_b}) = T_b^o + \Delta {T_b}{/tex}
{tex} = 373K + 0.0187K{/tex}
{tex}\Delta {T_b} = 373.019K{/tex}

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Kamlesh Kumar 6 years, 5 months ago

Explain in detail

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ANSWER

Why onitrophenol has lower bioling point than pnitrophenol

Posted by Kamlesh Kumar 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

? Natasha Yadav? 6 years, 5 months ago

On the other hand due to presence of intramolecular hydrogen bonds in ortho nittrophenol , the interaction between molecules are less and interaction within molecules are greater. And this causes less stability and lesser boiling point

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? Natasha Yadav? 6 years, 5 months ago

In case of p-nitrophenol , the interaction between the molecules are much stronger due to intermolecular hydrogen bonds. And this result in more stability and thus higher boiling point.

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ANSWER

Explain why aquatic species are more comfortable in cold water rather than in warm water

Posted by Kamlesh Kumar 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

The amount of Oxygen dissolved in water decreases at higher temperature as a result it becomes more difficult to breathe less dissolved oxygen hence the aquatic species are not comfortable in warm water.

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? Natasha Yadav? 6 years, 5 months ago

As solubility of gas is inversely proportional to temperature, oxygen is more soluble in cold water due to less temperature. If availablity of oxygen is there so aquatic species find it easier to live in cold water rather than hot water.

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ANSWER

What is the reason for the formation of tribromopehnol when phenol is treated with aqueous Bromine.

Posted by Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

CBSE > Class 12 > Chemistry

51 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

English. is our next

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? Natasha Yadav? 6 years, 5 months ago

I mean test of which subject

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? Natasha Yadav? 6 years, 5 months ago

No no keep your aeroplane with you , i don't need it, i will make my own aeroplane of my English paper ( worst paper). Which is next!?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

koi ni English ka land kerva dunga. ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

? ? OK but banaya iske liye tha.. ? ?

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? Natasha Yadav? 6 years, 5 months ago

You made aeroplane. Really, i can't believe because i am big fan of flying aeroplane, ok you can land your aeroplane at my home. When the flight took off, when will it arrive. Am just kidding.

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

iska question paper toh Maine he aeroplane bana ke uda diya tha. ??

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

but I will keep posting question.. from the question paper.

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

question paper. ?? fax se bheju ya kese. BTW I don't use any social media. vese na he lo toh accha hai... cbse ke level ka nhi. ek bhe question nhi tha jise cbse consider kare.

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? Natasha Yadav? 6 years, 5 months ago

I agree teachers always cheat us. But we are students afterall.

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? Natasha Yadav? 6 years, 5 months ago

Today marks were announced in our class each was of 40 marks. I scored less but that isn't going to decide my performance. So be positive. I know both of you are positive , this looks in your behaviour.

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? Natasha Yadav? 6 years, 5 months ago

How was your paper, reading this i think the level was above your expectation. I want a small favour can anyone help. Can you give me your question paper. Its a humble request. Darshana and Rohan.

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Achha g...?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

Kitna bhi puch le vo tujhse kya likha tha mat batayio. ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

usay abhi bhi smjh nhi aaya I grantee. ? ? mat batayio. ? ?

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

inka nhi Lanka h ??...small "l" h ye *i* nhi h..??

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

inka smjh nhi aaya kya bola. inka ko dhaa what is this. yaar ?

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Kya...bola mne...??...mne toh kuchh bhi ni kaha????

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Kya smjh nhi aaya...lnka ya same 2 same??

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

mat batayio kya bola tune. ? ?

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

*toh

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Yep...same 2 same means...KVS..ya KsK..same to same..??middle word hi tob chnge ..??..

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

kya bola tumne

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

what? mujhe kuch smjh ni aaya.

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Toh...lnka ko dhaa diyo..??...Mr Champ..??...tum toh dhaa doge..??

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

kya same to same? ?

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Ohk...???..same to same..??...vhi toh m boli...??

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

physics ka aesa nhi physics Mein Lanka lagegi. physics ke sir jitna accha padhte hai utna accha level bhi rekhte hai exam ka.

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

me too ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

nope Ksk... I was ex kvian. ?

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Can i ask something...tumhare school ka name....KVS hi h kya...??..

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Nhi puchungi...bhai...Tum dono ka ye haal ...baaki...toh pta? hi nhi...dhoka jyada dete h tumhare teachers ?? ...tumhare chapters bhi bhot jyada the...bt isse idea toh mil gya hoga...physics ka bhi iss way m hi aayega exam...

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

as expected from u. u won't answer me ?but sub kuch ek side aur ker ke pls answer ker diyo.

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

exam kesa gya. each nd every student in tha hall looking each other face. means haadh ker di... teacher ne Hume bola question paper contain only ncert questions but reality is totally opposite. dhokha bus.

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

iss se pridict ker le kesa gya hoga exam. paas ho Jaye infact koi 70 mein se 40 bhe le aaye toh banda intelligent hoga.

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Tum toh btao apna...tumhara kaisa hua exam??..

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

bro in which subject u have posted that question.? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

hyy howz the exam.? I know u will not gonna reply my answer but at least discuss 3-4questions. as u know paper have standard. maximum questions of advance level. so I want to discuss question if I post few question then answer it. beshak baat mat keriyo but answer ker diyo. ?

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Ya..kaisa hua...exam ???

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

thx a lot. yarr

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? Natasha Yadav? 6 years, 5 months ago

All the best Darshana for today's test. Be confident.

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Bye..ohk..tum bhi krlo.. mera bhi h test kl...mere toh holidays the isliye revise hi krna h..bye bt ur is exam..then talk 2 me

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

hmm bye . see u if it's possible.

2Thank You

Srishti Choudhary ✍⏳ 6 years, 5 months ago

Welcm ☺...ohk..finish kr lo...✌?✌?..

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

thx a lot yarr. ? not now it's about to done

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Srishti Choudhary ✍⏳ 6 years, 5 months ago

Hey darshu..all best 4 ur exam..preps ho gyi ??

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

l am not gonna say welcome. becoz I am not here to help u every time . ??

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

thx both of u. ?

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? Natasha Yadav? 6 years, 5 months ago

In aqueous solution, phenol ionizes to give a charge, the oxygen atom of phenoxide ion donates electrons to the benzene ring to a large extent . As a result , the ring gets highly activated leading to the formation of trisubstituted product.

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

In aqueous soln. phenol exist as phenoxide ion. It is highly activates the ring and is responsible for the accumulation of - ve charge at ortho- nd para - positions. Three Bromine atoms are introduced at 2, 4 nd 6 - position of the ring.I am not sure. but I guess this will be an appropriate answer

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ANSWER

Convert ethylene glycol to Urotropine

Posted by Aditi Yadav 6 years, 5 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

For the reaction A + 2B + C,when the volume of container is double rate of reaction decrease 8 times. When concentration of A is double and B is halved then rate of reaction increases 4 times alone rate of reaction is 64 times.Find the order of the reaction.

Posted by Aastha Saxena 6 years, 5 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Thermal stability decreases from H2O to H2Te. give reason.

Posted by Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

CBSE > Class 12 > Chemistry

15 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

thx srishti ?

1Thank You

Srishti Choudhary ✍⏳ 6 years, 5 months ago

All the best 4 ur exam..??✌?..ab toh ho hi gyi hogi tumhari organic..??..kyu champ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

vo toh hai.. ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

zarror ajeeb vichitra prani hai tu. ??

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

koi ni tension ka bhi apna maja hai enjoy this tension ??

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

ya yaar...for periodic test it's too much normally every schl use to give 2 and maximum 3 chapters.. but here story is quite different.. ?

1Thank You

? Natasha Yadav? 6 years, 5 months ago

Isn't it too much

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

na na from 1st book we have 3 chapters and from 2nd book 4 chapters.

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? Natasha Yadav? 6 years, 5 months ago

Whole syllabus is coming?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

Maine toh amines he left ker rekha hai.

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

puri hai uski preparation. ??

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? Natasha Yadav? 6 years, 5 months ago

Btw Darshana, rohan is checking your preparation.

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? Natasha Yadav? 6 years, 5 months ago

This is because as we move down the group , atomic size increases due to which bond dissociation enthalpy decreases. As the enthalpy of dissociation decrease fown the group, the thermal stability also decreases.

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

abb mujhe dar lag ra hai.. ??? tu prepare hai. ??

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

The thermal stability of hybrid decreases on moving down the grp. this is due to the decrease in the bond dissociation enthalpy(H-E) of hydride on moving down the grp. where E = O, S, Se, Te.

1Thank You

ANSWER

How does xenon atom form compounds even though the xenon atom has a closed shell electronic configuration?

Posted by Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

correct hai. ? next answer keriyo jara.

0Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

Although xenon had stable outer shell configuration but owing to large size of atom ionisation energy of Xe becomes lower in comparison of Noble gases. electronegative element like O and F thus easily ionise the Xe atom to form stable chemical compounds.

1Thank You

ANSWER

In some cases, it is found that a large number of colliding molecules have energy more than threshold energy yet the rxn is slow why.?

Posted by Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

CBSE > Class 12 > Chemistry

12 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

balika offline hone ka samaye aa gya . ? ?

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

avashy balak. ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

dhanyawaad. bus dua kero ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

ohh. aesa hai. ?? lage raho... hope Zonal se aage Tera state par selection ho jaye

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

kisne bola tujhe ?? aesa nhi hai full syllabus Dena hai koi relaxation nhi diya Inn sports authority walo ne.. bus agar koi match exam ke din aata hai toh mai vo exam July mein de skta hoon without any mark of compartment. bus itni mehrbaani ki hai... baaki Dena wahi hai Jo Tum log doge. ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

ufff.. tension Teri zyda hai. ? ? vese mujhe koi bol ra Tha ke tu half syllabus ka exam dega... actually... sports quota hai na tere par aur tu Zonal level par bhi hai.. so sachi mein tu half syllabus ka exam dega.? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

Haan beta sahi hai.. ?? Maine ni kiya konsi language mein smjhaun tujhe.. organic nhi aati mujhe... aur vese bhi aaj bhi tournament hai aur kl bhi hai uski bhi practice kerni hai... ek insaan kya kya kare..

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

vese Tune ker Liya hoga. ? tej chalta hai tu toh. ? ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

ni hua kuch ni hua... ??

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

BTW ker Liya prepare.? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

correct answer... thnku ?

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

it is due to the proper orientation or due to another factor P called stearic factor which refers to the orientation of the colliding molecules. these are the two main factors which are responsible for a rxn to occurs slowly.

1Thank You

ANSWER

Y 18th group elements are called mono-atomic gases

Posted by Lavanya Skelly 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Abhiyank Rajouria 6 years, 5 months ago

Noble gases are monoatomic because they have complete octet (apart from Helium, which has duet) , hence they are highly stable on their own and do not react with others to form compounds in standard temperature and pressure conditions.

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ANSWER

Why boiling point decreases with branching?

Posted by Ramsha Malik 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Abhiyank Rajouria 6 years, 5 months ago

As surface area decreases and thus boiling point decreases .

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? Natasha Yadav? 6 years, 5 months ago

As the branching increases the surface area of compound decreases, as surface area is directly proportional to vander waal interaction forces. The interaction forces between atom will decrease and they become weak on branching. Hence, molecules with weak forces of interaction are easy to boil...Thus , as branching increases boiling point decreases.

1Thank You

ANSWER

How can we prepare sulphur sol?

Posted by Rahul_ Ry(ʘ‿ʘ) 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Rahul_ Ry(ʘ‿ʘ) 6 years, 5 months ago

Here you go again....

2Thank You

? Natasha Yadav? 6 years, 5 months ago

We can prepare sulphur sol by Bredig's arc method, in which the metal rodes must be of sulphur. To know the process refer to NCERT.

1Thank You

ANSWER

The conversion of molecules x to y follows second order kinetics if concentration of x increase to three times how will it affect the rate of formation of y

Posted by Kaya Byabang 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Anoop Yadav 6 years, 5 months ago

9 times

0Thank You

ANSWER

why Benzoic acid is stronger acid than acetic acid?

Posted by Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

CBSE > Class 12 > Chemistry

7 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

nope... it's periodic test

0Thank You

? Natasha Yadav? 6 years, 5 months ago

I mean half yearly or tests.

1Thank You

Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

unfortunately. seriously. ? but koi ni.. vese bhe Konsa tu mujhse baat kerti hai... habitual now.

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

ya niharika unfortunately we are schl mate he have pcm nd I have pcb... BTW we have chemistry exam on 1 of August.

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? Natasha Yadav? 6 years, 5 months ago

Are you both classmates, which exams?

2Thank You

Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

thank you.

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

The - COOH grp in Benzoic acid is connected to sp2 hybridised carbon of benzene ring which is more electronegative than sp3 carbon of - CH3 to which COOH is connected in acetic acid. hence Benzoic acid is stronger.

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ANSWER

Distinguish b/w alcohol and phenol.

Posted by Rahul_ Ry(ʘ‿ʘ) 6 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

Rahul_ Ry(ʘ‿ʘ) 6 years, 5 months ago

Cause she knows every ans. that asked by all of you ...i saw that...

2Thank You

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 5 months ago

But why?

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Rahul_ Ry(ʘ‿ʘ) 6 years, 5 months ago

You are very intelligent....

3Thank You

? Natasha Yadav? 6 years, 5 months ago

Alcohol has a hydroxyl group attached to aliphatic hydrocarbon. Phenol has a hydroxyl group attached to aromatic hydrocarbon.

2Thank You

ANSWER

Chloro acetic acid is stronger acid than acetic acid Explain.

Posted by Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

? Natasha Yadav? 6 years, 5 months ago

Study, rohan

1Thank You

? Natasha Yadav? 6 years, 5 months ago

Who is asking for welcome, you can tap the thumb thanks, i will understand that you are praising me

1Thank You

? Natasha Yadav? 6 years, 5 months ago

Chlorine being a stronger electron withdrawing group, pulls the negative charge towards itself by inductive effect so that the negative charge density on the oxygen atom, is reduced, hence stabilizating the conjugate base of chloroacetic acid. While the negative charge on oxygen atom in acetic acid is localised and conjugate base is less stable.

1Thank You

Řøhăň Řąjpůť ✌️✊ 6 years, 5 months ago

Carbon atom of - CH2Cl group acquires partial +ve charge which spreads to oxygen of chloro acetate ion when H+ is released. so the - ve charge of this oxygen is stabilised and anion becomes a weak Base. correspondingly the acid becomes a strong acid.

1Thank You

ANSWER

List of all organic naming reactions.May I get them.

Posted by ? Natasha Yadav? 6 years, 5 months ago

CBSE > Class 12 > Chemistry

9 answers

? Natasha Yadav? 6 years, 5 months ago

Thanks for putting commas.

0Thank You

Tarun Kumar 6 years, 5 months ago

Sandmayer,gattermaan,balz schieman, Finkelstein,swarts,wurtz,wurtz fitting,fitting,friedal craft alkylation,friedal craft acylation, reimer tiemann,kolbe,rosenmund,stephan,etard,gattermann koch ,clemmenson reduction,wolfkishner,tollens,fehling, aldol,cannizaro,kolbe,HBZ,gabriel ptallimide ,hoffman bromamide degradation,carbyl amine,hinsberg, coupling

2Thank You

Tarun Kumar 6 years, 5 months ago

Yes

0Thank You

Tanvi Toor 6 years, 5 months ago

Exactly @niharika ??

1Thank You

? Natasha Yadav? 6 years, 5 months ago

I think if you would have put commas it would be easy for me . But anyways thanks.

0Thank You

Rahul_ Ry(ʘ‿ʘ) 6 years, 5 months ago

? did you finish all these reactions...

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Tarun Kumar 6 years, 5 months ago

Sandmeyer Gatterman Balz-schiemann Finklestain Swarts Wurtz Wurtz fitting Fitting Friedalcraft alkylation Friedalcraft acylation Reimer tiemann Kolbes Rosenmund Stephan Etard Gatterman koch Clemmenson Wolffkishner Tollens Fehling Aldol Cannizaro Kolbe electolysis Hell volhard zelinsky Gabriel pthallimide Hoffman bromamide dagradation Carbyl amine Hinsberg Coupling

4Thank You

? Natasha Yadav? 6 years, 5 months ago

I searched , but i found that they were not in proper sequence and some were missing. I could find them in NCERT but my book is not with me right now.

0Thank You

Yogesh Kumar 6 years, 5 months ago

Internet

1Thank You

ANSWER

How can i do chemistry

Posted by Premesh Tyagi 6 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

? Natasha Yadav? 6 years, 5 months ago

Organic chemistry, yell , the subject which seems difficult to almost every student including me, some exceptions are there, ofcourse. So, for this i would advice to first of all clear the basics of 11th, then mechanisms and the naming reactions. You should also practice iupac naming. Naming reactions should also be done, i couldn't advice anything on naming reactions as me too is facing problem. But ya, practice makes a man perfect.

1Thank You

? Natasha Yadav? 6 years, 5 months ago

Moving to inorganic chemistry, its just not all the mugging up. Yes, it require mugging up of reactions, but there is no other way to do them, just practice them regularly. The theory part , certainly has many reasoning questions, study in deep the basic concept behind this and it would be again easy.

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? Natasha Yadav? 6 years, 5 months ago

For physical chemistry, you should learn all the formulas by practicing maximum numericals. I have often seen that many students tend to ignore the theory part , which is also equally important. So, do theory part as well. I would advice you to practice numerical from NCERT and after completing with it move to NCERT exemplar. As per me, no other reference is required , once you go throughly through NCERT. Moreover, practicing previous years questions from each chapter is important, this is not just for physical chemistry , but for all subjects.

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? Natasha Yadav? 6 years, 5 months ago

Chemistry is a easy subject as well as scoring . You can easily do it by maintaining regularity and consistency. Understanding and applying various formulas and several applications is also necessary . Last but not the least, you should not study for marks rather than for learning and gaining knowledge, by this you will develop interest in the subject and it would be easy to you.

2Thank You

ANSWER

What is the common name of 1-chloro 2- methyl propane?

Posted by Ramsha Malik 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Jaya Malik 6 years, 5 months ago

Isobutylchloride

1Thank You

? Natasha Yadav? 6 years, 5 months ago

Isobutyl chloride.

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ANSWER

Function of redP and SOCl2

Posted by Ramsha Malik 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

? Natasha Yadav? 6 years, 5 months ago

Thionyl chloride is best used in converting alcohol to alkyl chloride. It is preferred because the bi-products formed are all gases which escape in atmosphere. Thus, only pure alkyl chloride is left behind.

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? Natasha Yadav? 6 years, 5 months ago

Red phosphorus is a active reagent, along with bromine and iodine used as reagents , for converting alcohol to alkyl halide.

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ANSWER

What is the function of PCl5in the formation of haloalkanes from alkohol

Posted by Ramsha Malik 6 years, 5 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the function of PCl3 in the formation of haloalkanes from alkohol

Posted by Ramsha Malik 6 years, 5 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the function of NaBr and H2SO4in the formation of haloalkanes from alkohol

Posted by Ramsha Malik 6 years, 5 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Define imbibition,Seneresis & thixotropy

Posted by Anoop Yadav 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 6 years, 5 months ago

Imbibition is a special type of diffusion when water is absorbed by solids - colloids - causing them to enormously increase in volume. The classical examples of imbibition are absorption of water by seeds and dry wood.
Syneresis is the extraction or expulsion of a liquid from a gel, as when serum drains from a contracting clot of blood.
Thixotropy is a time-dependent shear thinning property. Certain gels or fluids that are thick or viscous under static conditions will flow over time when shaken, agitated, sheared or otherwise stressed.

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ANSWER

Why cr2o4- is an oxidizing agent

Posted by Entertainment . 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Aadi Ahluwalia 6 years, 5 months ago

If the oxidation number is less, then it gained electrons and was reduced. The substance that is reduced in a reaction is the oxidizing agent because it gains electrons. The substance that is oxidized in a reaction is the reducing agent because it lost electrons.

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ANSWER

What is molecularity ?

Posted by Ujndjiioe Jnjeeijn 6 years, 5 months ago

CBSE > Class 12 > Chemistry

3 answers

Krupa Kannan 6 years, 5 months ago

The minimum no of moles required for the reaction to take place.

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Sandeep Tyagi Sandeep Tyagi 6 years, 5 months ago

Those reaction in which the number of moles of reactant express rate law

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

It is the number of reacting species taking part in an elementary rxn, which must collide in order to bring about a chemical rxn. It is a theoretical concept. it is always a whole number value. its value can never be 0 or fractional.

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ANSWER

Explain why aquatic species are more comfortable in cold water reater than in warm water?

Posted by Ajit Pahal 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Krupa Kannan 6 years, 5 months ago

It is well explained by the Henry's law. As the temperature increases the solubility decreases. Thus more solubilty of oxygen in cold water makes it more comfortable than warm water as the temperature is high in it.

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Ďãřşháñăã Yadav ? ? ? 6 years, 5 months ago

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