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can you explain the chapters in hindi

Posted by Sanjay Kumar 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Yadavgaurav Gauravyadav 6 years, 4 months ago

Sorry

ANSWER

Why does physisorption decrease with the increase of temperature

Posted by Swarn Kiran 6 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Jk Verma 6 years, 4 months ago

Gas +solid------------->gas/solid +heat Thus , according to le chatlier's principle on increasing temperature the reaction proceeds in backward direction and favours "desorption". And on decreasing temperature the reaction shifts in backward direction and favours "Adsorption"of gas on solid.

Rakshit Verma 6 years, 4 months ago

In physisorption the adsorbents make weak vaan der vaal forces with adsorbate which broke with increase in temperature

Yogita Ingle 6 years, 4 months ago

Adsorption is an exothermic process. Heat is releases whenever molecules are adsorbed on the surface. So, rate of adsorption decreases whenever temperature is increases. This due to the fact that, when temperature is increases, the kinetic energy of adsorbed molecules gets increased and they overcome the electrostatic force of attraction by the adsorbent surface.

ANSWER

Why halogens are placed first in spectrochemical series.?

Posted by Harsh Harsh 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What are limitations of crystal field theory.

Posted by Harsh Harsh 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 4 months ago

The crystal field theory is highly useful and more significant as compared to the valence bond theory. Even after such useful properties, it has many limitations. The following points will clearly state the limitations of crystal field theory:

The assumption that the interaction between metal-ligand is purely electrostatic cannot be said to be very realistic.
This theory takes only d-orbitals of a central atom into account. The s and p orbits are not considered for the study.
The theory fails to explain the behaviour of certain metals which cause large splitting while others show small splitting. For example, the theory has no explanation as to why H₂O is a stronger ligand as compared to OH^–.
The theory rules out the possibility of having p bonding. This is a serious drawback because is found in many complexes.
The theory gives no significance to the orbits of the ligands. Therefore it cannot explain any properties related to ligand orbitals and their interaction with metal orbitals.

ANSWER

Among halogens, radius ratio between iodine and fluorine is maximum. Explain.

Posted by Kalpana Jha 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why NeF2 does not exist?

Posted by Kalpana Jha 6 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

K@Łp@N@ $Øđh!?? 6 years, 4 months ago

Ne is a Period 2 element . ... To unpair them and move it to a higher energy orbital will need high amount of energy which can not be compensated by the formation of the Ne-F bond. Hence NeF2 does not exist.

Tanishq Shukla 6 years, 4 months ago

Ne is a highly stable molecule and it has low tendency to form bonds and it can be explaned on the bases of valence bond theory.

Aadi Ahluwalia 6 years, 4 months ago

Ne is a Period 2 element To unpair them and move it to a higher energy orbital will need high amount of energy which can not be compensated by the formation of the Ne-F bond. Hence NeF2 does not exist.

ANSWER

Formation fo hydrides oxyzen

Posted by Bhikham Sahu 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Bhikham Sahu 6 years, 4 months ago

Group 16 all ele.ents H2x type make hydride

ANSWER

What is the difference between evaporation and boiling

Posted by Diya Varghese 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Gaurav Seth 6 years, 4 months ago

• Evaporation:-

1) Evaporation is the process of conversion of a liquid into vapours at any temperature below its boiling point.

2) In the process of evaporation, bubbles are not formed.

3) It is slower than the process of boiling (Slow process).

4) It occurs at all/any temperature.

5) In the process of evaporation, temperature may change.

6) Energy supplied by the surroundings.

• Boiling:-

1) Boiling is the process by which a liquid turns into a vapor when it is heated to its boiling point.

2) In the process of boiling, bubbles are formed.

3) It is faster than the process of evaporation (Quick process).

4) It occurs at a definite/fixed temperature (boiling point).

5) In the process of boiling, temperature remains constant.

6) Energy supplied by a source of energy.

Baljot Sidhu 6 years, 4 months ago

evaporation is natural process and boling is occurred by human by heating water

ANSWER

Is the solid state chapter removed

Posted by Kanhaiya Nayak 6 years, 4 months ago

CBSE > Class 12 > Chemistry

7 answers

K@Łp@N@ $Øđh!?? 6 years, 4 months ago

Yes it is removed

Kiran??? Gautam 6 years, 4 months ago

It is removed

Aadi Ahluwalia 6 years, 4 months ago

Yes from cbse boards exams it removed but for neet purpose it exist

? Natasha Yadav? 6 years, 4 months ago

Yes

Surender Singh Dhindhwal 6 years, 4 months ago

Yes of course

Diya Varghese 6 years, 4 months ago

Yes. Its not there for 12 class students

Premesh Tyagi 6 years, 4 months ago

Yes

ANSWER

What are zeolites and what are its units called?

Posted by ? Natasha Yadav? 6 years, 4 months ago

CBSE > Class 12 > Chemistry

4 answers

Amol Gùpta 6 years, 4 months ago

Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents and catalysts

K@Łp@N@ $Øđh!?? 6 years, 4 months ago

It is a shape selective catalyst of alumino silicates have a honey comb like structure with a network of Al - O - Si bond.

? Natasha Yadav? 6 years, 4 months ago

Can you explain in detail....

Anjali Kaushik 6 years, 4 months ago

Zeolites are shape selective calayst.

ANSWER

Formaldehydes does not react with ammonia. Why

Posted by Pawan Kumar 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the use of integrated rate equation

Posted by Amol Gùpta 6 years, 4 months ago

CBSE > Class 12 > Chemistry

47 answers

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Hmmm...

Amol Gùpta 6 years, 4 months ago

Because I am not able to find him on fb

Amol Gùpta 6 years, 4 months ago

Accha then no other option to talk to her just like mai bhi rohit se baat nhi kr paa rhi hu

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Na nHi hu

Amol Gùpta 6 years, 4 months ago

Tum log social media se connect nhi ho kya

Amol Gùpta 6 years, 4 months ago

Tumne tease kiya tha btt maine to sirf dekha tha btt phir bhi......

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Yarr Darshana ki yaad aa rahi hai.....?...jab vo yaha thi tab toh usse pareshaan kiya ab ....??....

Amol Gùpta 6 years, 4 months ago

Vo bhi h

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Serious hoti toh aisi behki behki baate na karti....???

Amol Gùpta 6 years, 4 months ago

Tumhari insta id privacy me h kya

Amol Gùpta 6 years, 4 months ago

Are you Serious ??? Maine book worm ka opposite bola tha and mai bhi manushya hi hu ?????

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Mein toh manushya prani hu.....???

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Oh, phir tum worm nahi ho uska opposite kya hota hai tum hi bata do?

Amol Gùpta 6 years, 4 months ago

Nhi just opposite

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Haan ho sakta hai .....??...kher tum bookworm ho kya????

Amol Gùpta 6 years, 4 months ago

Nhi yrr kya pta koi aur reason ho

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Na na aise baccho ko toh mai bookworm ??bolti hu.....???

Amol Gùpta 6 years, 4 months ago

Hmm padne vaale bacche h

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Yeh bhi ho sakta hai

Amol Gùpta 6 years, 4 months ago

May be studies m busy ho

Amol Gùpta 6 years, 4 months ago

Haa yrr pta nhi hua kya usko

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Voh hi toh...aur phir tumhara accha friend bhi tha aur baate bhi bahut karta tha....??

Amol Gùpta 6 years, 4 months ago

Haa Yrr helping nature ka tha pta nhi kya hua

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Bin bataye gayab ho gya kya???

Amol Gùpta 6 years, 4 months ago

Pta nhi yrr kaafi tym ho gya dikh nhi rha

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Ishika vo Rohit kaha gya????

Amol Gùpta 6 years, 4 months ago

Haa kyu nhi

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Ishika stress ko relieve karne ke liye kuch time baate bhi kar leni chahiye so you can talk with me.....if you want....??

Amol Gùpta 6 years, 4 months ago

Okk nhi kr rhi hu bye

Amol Gùpta 6 years, 4 months ago

Pr phir bhi lecture dene ki kya jarurat thi bhai

Amol Gùpta 6 years, 4 months ago

Rohan same condition h meri bhi

Srishti Choudhary ✍⏳ 6 years, 4 months ago

Hmm...ye toh shi kaha shanti hoti h..

Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

mai toh exam mein BUS shkl dekhta hoon . likhne wale ki ??... neend bhi puri ho jati hai itni shanti hoti hai Hall mein ???

Srishti Choudhary ✍⏳ 6 years, 4 months ago

Hmm..ab thnks kr k chup chap nikl lo...vrna bhaii..angry ho jaayenge

Srishti Choudhary ✍⏳ 6 years, 4 months ago

Mujhe lgta h apna experience bta rhe ho..shaayad ??..q Rohan..

Srishti Choudhary ✍⏳ 6 years, 4 months ago

Mtlb...gaayab ho jaungi

Amol Gùpta 6 years, 4 months ago

Bhaiya ka lecture aaya ab sb chup?? just for fun don't mind

Srishti Choudhary ✍⏳ 6 years, 4 months ago

Hmm...isliye q ki bnde dusre ki baat ko dil pr lekr khud ko hi heart krte h...so tu bhi kisi ka bura mt maana kr!!! Jo jaise bol ra h..vo situation hi dekh kr bolta h...hme nhi pta rehta hm shi h ya glt..ye sirf dusre bnde ko pta rehta h...arrey inn s nhi sunege toh...or kis se sunege..suna de mere bhaiii

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

Arrey bhai isko casually lo.... Srishti tum mujhse sunao apne jokes...

Srishti Choudhary ✍⏳ 6 years, 4 months ago

Na...bhaii ab ni krne ki..suicide is not best option..na hssa kr..bs

Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

dekho aese jokes crack mat kera keru instead of laughing on these jokes suicide is best option. ?

Srishti Choudhary ✍⏳ 6 years, 4 months ago

Koi ni m bhijvaa dungi

Amol Gùpta 6 years, 4 months ago

Nhi aaise hi jyada acche se samajh aata h so it's good

Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

ohk next time I'll give only to the point answer. BTW welcome

Amol Gùpta 6 years, 4 months ago

Haa rohan thoda bada jarur h pr samajhne k liye easy h thnx for the hlp

Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

sry Maine thoda deep mein answer de diya.. jiski zarrort nhi thi.. make it short according to Ur understanding level. May it help ?

Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

becoz differential rate eq. is not convenient to determine the rate law nd also the oder of rxn . it is so becoz the instantaneous rate has to be determined from the slope of the tangent at time to in the plot of concentration v/s time. this measurement is not only inconvenient but also lack accuracy hence to overcome this problem we use integrated rate eq. this eq. give us an eq. relating directly the experimental data. like time, concentration at different time nd rate constant.

ANSWER

Why SF6is known but SH6 is not

Posted by Anmol Sharma 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Aadi Ahluwalia 6 years, 4 months ago

sf6 exist because electronegativity of fluorine is most high, it is of small size and high polarising power but it is not possible in SH6.

Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

Fluorine being the strongest oxidising agent oxidises sulphur to its maximum oxidation state of +6 and thus forms SF6. In contrast H2 being a very weak oxidising agent can't oxidise S to its maximum oxidation state of +6 and hence doesn't form SH6

ANSWER

Why HOBrO does not exist?

Posted by Kalpana Jha 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why does liberation of h2 prevent formation of ferric chloride

Posted by Kalpana Jha 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Reducing property increases from H2S to H2Te but decreases from SO2 to TeO2. Why?

Posted by Kalpana Jha 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Kalpana Jha 6 years, 4 months ago

But size increases hence bond should become weaker and reducing property should increase

Ankit Aryan Shivan 6 years, 4 months ago

Reducing property increases from H2S to H2Te becoz size is very large due to which, there is weak bonding b/w hydrogen but decreases from SO2 to TeO2 due to electronegativity decreases and metallic character increases and hence reducing character decreases.

ANSWER

Maximum hours for chemistry in bord exam

Posted by Bipen Singh 6 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

No definite hours....

K@Łp@N@ $Øđh!?? 6 years, 4 months ago

2 hrs is enough

Aadi Ahluwalia 6 years, 4 months ago

3 hrs

ANSWER

Can u send 12th cbse q.paper model

Posted by Santhosh Godari 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

what is the role of extension of znic in Ag

Posted by Raj Yadav 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Give characteristics of solid state

Posted by Sumit Solanke 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Diff. Bet. The structure of glucose and fructose

Posted by Kiran??? Gautam 6 years, 4 months ago

CBSE > Class 12 > Chemistry

4 answers

Kiran??? Gautam 6 years, 4 months ago

Yr koi to str bhej do

Kiran??? Gautam 6 years, 4 months ago

Can u draw the structure

Arunaditya Das 6 years, 4 months ago

They show different optical isomerism

Anushree Agarwal 6 years, 4 months ago

They have same molecular formula but glucose has a six member ring structure and fructose has a five member ring structure.

ANSWER

All in one or Arihant chapter wise or Rachna Sagar Chapter wise Which is better

Posted by Divyansh Dubey 6 years, 4 months ago

CBSE > Class 12 > Chemistry

6 answers

K@Łp@N@ $Øđh!?? 6 years, 4 months ago

Arihant is better

Saurabh Gupta 6 years, 4 months ago

All in one is best

Pragati Saini 6 years, 4 months ago

Arihant is best

Kiran??? Gautam 6 years, 4 months ago

Arihent is the best

Mukan Jangra????? 6 years, 4 months ago

Arihant chapter wise

Priya Dharshini ? 6 years, 4 months ago

Arihant chapter wise board question book is nice... it has all important questions in it and xamidea is good for mostly numericals of various types..

ANSWER

Complete organic reactions

Posted by Kana Bhati Bhati 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Give test for so2

Posted by Pinky Sahoo 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

as we know that the liquid nitrogen is very good and affective in the case of freezing something but then also we don't use it in fire extinguisher why?

Posted by Bhaghwan Kamble 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Arunaditya Das 6 years, 4 months ago

Its not only a cooling agent its a supercooling agent...it might lead to freezing of objects which might break too

ANSWER

Sulfur to oxygen bond length in SO2 is same even though one is double bond and the other is single. Why

Posted by Pinky Sahoo 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Nishu Goyal 6 years, 4 months ago

Due to resonance partial double bond character appear because of which both bond have same bond length

ANSWER

SO2 is major pollutant. Why?

Posted by Pinky Sahoo 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Kalpana Jha 6 years, 4 months ago

SO2 in air combines with rain water to become h2so4 which in turn acts as a corrosive agent, thereby causing land and water pollution.

Nishu Goyal 6 years, 4 months ago

Because it cause damage to men , plants ,animals,and building . Like in animal and men it cause many respiratory disorder. In plant it decrease rate of photosynthesis. On building it decrease shine by falling in form of acid rain

ANSWER

H2O is amphoteric whereas H2S is acidic. Why?

Posted by Pinky Sahoo 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Shruti Singh 6 years, 4 months ago

Due to IMHB

Gaurav Seth 6 years, 4 months ago

S is much larger atom than O, so the H–S bond is much longer and weaker than H–O; hence H2O is weaker acid than H2S. HF is stronger than H2S because the small F- ion bonds more strongly to the water molecules than does the larger HS-

ANSWER

Calculate the Henry constant for SO2 gas at 25°C if the 2 gram SO2 is dissolved in 100g of water. (The pressure of gas is .2 ATM)

Posted by Aarushi Singh 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Harsh Kumar 6 years, 4 months ago

5.02

ANSWER

What is Henry's constant?

Posted by Aman Yadav 6 years, 4 months ago

CBSE > Class 12 > Chemistry

5 answers

Premesh Tyagi 6 years, 4 months ago

Partial pressure of each component is directly proportional to its mole fraction is called Henry law

Garvit Meena 6 years, 4 months ago

A/c to Henry's law, the solubility or mole fraction of a gas dissolved in a liquid is directly proportional to the partial pressure of gas present above the liquid surface.

Bipen Singh 6 years, 4 months ago

Partial pressure of gas dissolved in liquid is directly proportional to the mole fraction !!

Nishu Goyal 6 years, 4 months ago

Henry constant is used in place of prop. In henry law . It is directly proportional to temp. And inversly proportional to solubility

Pragati Saini 6 years, 4 months ago

In chemistry, Henry's law is a gas law that states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. The proportionality factor is called Henry's law constant.

ANSWER

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