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

BTW suggest me some some topic for investigatory project (chemistry) which requires less creativity... becoz meri creativity tum jaati ho kitni acchi hai. ? ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

? ? ? himmat ki baat tum soch smjh kar bolo. ??

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Ďãřşháñăã Yadav ? ? ? 6 years, 4 months ago

phone ka data off Kerne ke liye himmat chahhiye ? soch ker bolo. ???

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

acchi baat hai dekho. ? Maine Konsa kisi ka TV ya phone ka data band ker dena hai.

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? Natasha Yadav? 6 years, 4 months ago

By the way Rohan, age will not judge what should one watch

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? Natasha Yadav? 6 years, 4 months ago

I too love to watch doreamon and sinchan

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Ďãřşháñăã Yadav ? ? ? 6 years, 4 months ago

answer mill gya na.. ? ? offline ho jaa shanti se. ? ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

BTW Darshana Haan dekhta hoon highlights of sports.. but I am not like u ke shinchan aur doreamon dekho.. ? ? grow up.. u are in 12th standard cartoon dekhne ki age nhi hai. ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

? ? bhai bahut accha bol diya... thanks. ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 4 months ago

nhi ye fir bhi boring hai.. ? ? abb khud socho kon highlight match dekhta hai. ? ? ye hoti hai mental illness Jo dekha hua match free time mein fir se dekhe. ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

darshu bol toh ri hai boring hoon... ? ? first time uska baat se sehmat hoon.. yes I am boaring. ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

bhai Maine avengers he nhi Dekhi. ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

ya bro admit it... but I have a major problem while watching movies.. mai so jata hoon... dekhte dekhte no matter chahe kitni bhi acchi ho.

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

thanks once again. ?.. lion King movie hai.. nhi dekhunga. least interested in movies wastage of time..? ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

? ? I don't need long long motivation speech. ? ? Just few words from my frnd are enough. ?..

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Ďãřşháñăã Yadav ? ? ? 6 years, 4 months ago

BTW Hakuna Matata ke liye lion King dekh liyo. ? ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 4 months ago

arrey sub ho jayega... don't take tension mera bhi complete nhi hai... barbaadi meri pakki hai last mein.. ? ? vese do regular study koi dusra option nhi hai... abb isse zyda kuch nhi bol skti... becoz I don't know how to give motivational speech. ? ? ? ?. bus apne aap motivate hi jao.. ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

? ? kya keru Tera. ? ? yaha tension hai tujhe Hakuna Matata yaad aa ra hai. ??vese hai kya ye. ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 4 months ago

Hakuna Matata.. ? ? ? ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

thanks yaar. ? tujhe dekh ker lagta hai tere chemistry sahi track par hai... but mujhe usi ka dar hai don't know kese hoga sub ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 4 months ago

carbon does not have d-orbital nd hence doesn't form dπ-pπ bond. In contrast si has empty d-orbital nd hence it forms dπ-pπ bond with O. as a result transference of electrons occurs from O to si. In otherwise words Bole toh simple language. ? electron density around O decreases it therefore withdraw electron of the O-H bond towards it. O-H bond on0(ch3) 3sioh breaks more easily than in (ch3) 3coh nd hence (ch3) 3sioh is more acidic than (ch3) 3coh.

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ANSWER

What do u mean by solvation ? What will happen if ions are strongly solvated. ?

Posted by Priya Dharshini ? 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Priya Dharshini ? 6 years, 4 months ago

Thanks rohan.. i will try that question aman..

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

Solvation is the process in which molecules of a solvent attract the particles of a solute. if ions are strongly solvated then it will result in dissociation.

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ANSWER

Positive and negative adsorption tell me ..

Posted by Vishal Shah 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

G Mankoo 6 years, 4 months ago

Positive adsorption- If the concentration on the surface is more than in bulk,is called positive adsorption. Negative adsorption- If the concentration on the surface is less than in bulk, is called negative adsorption.

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ANSWER

Resonance

Posted by Md Khushdil 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Himanshu Hada 6 years, 4 months ago

There are two defination - 1 resonance is one of the best coaching in IIT-JEE branch preparation for students 2 resonance is bond dislocation effect on aryl groups (ring groups) and form a resonance hybrid. Ex- resonance in benzene

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ANSWER

A First order reaction takes 40 mint For 30% decompostion calculate t1/2

Posted by Rishab Mishra 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Rishab Mishra 6 years, 4 months ago

Ohk

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Savitri Devi??? 6 years, 4 months ago

Firstly find K using formula : K = 2.303/t log a/ a-x Then put value of K in formula : T1/2=0.693/k

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What are genetic code? Elaborate genetic fingerprinting.

Posted by Himanshu Hada 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

He is p block elements

Posted by Aniket Sahu 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why dextro and laevo rotatory isomers of butan 2 ol is difficult to separate by fractional distillation

Posted by Sreedevi Krishna 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why ozone depletion occured over antarctica not over asia etc ? Because we are releasing nitric oxide, freons, etc. not pengiuns do that

Posted by Prateek Srivastava 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Add group 15 ?????????????

Posted by Hariom Kumar 6 years, 4 months ago

CBSE > Class 12 > Chemistry

4 answers

K@Łp@N@ $Øđh!?? 6 years, 4 months ago

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Tanvi Toor 6 years, 4 months ago

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Paras Kundu 6 years, 4 months ago

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Varsha Rajput 6 years, 4 months ago

Why

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ANSWER

Why periodically or regularly charging of batteries is necessary?

Posted by Pinky Sahoo 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Yuvraj Dusad 6 years, 4 months ago

Because without charging it will be discharged

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ANSWER

Why over charging should be avoided /harmful for batter?

Posted by Pinky Sahoo 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why boiling point of ether is more as compared to alkane?

Posted by Vasu Yadav 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 6 years, 4 months ago

Ethers have a higher boiling point than alkanes because they have both London dispersion forces and dipole-dipole interactions.

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K@Łp@N@ $Øđh!?? 6 years, 4 months ago

Ethers have a higher boiling point than alkanes because they have both London dispersion forces and dipole-dipole interactions. ... Alcohols have a higher boiling point than amines even though they have all the same intermolecular forces because oxygen is more electronegative than nitrogen, resulting in a more polar bond.

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Ellingham diagram explain

Posted by Vishal Shah 6 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

K@Łp@N@ $Øđh!?? 6 years, 4 months ago

But Ncert ki back me questions h iske or agar ye nhi smjo gye to vo questions b nhi honge

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Kalpana Jha 6 years, 4 months ago

It is deleted from the syllabus now

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K@Łp@N@ $Øđh!?? 6 years, 4 months ago

It is the process of reducing a metal oxide to metal by choosing a proper reducing agent to choose reducing agent following factors must be taken in care. (1) Entropy of the system should be increase (gibbs free energy become more negative) dalta H is negative

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ANSWER

Why molarity is more concentrated than molality

Posted by Ajangkangthir Rongpi 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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How to convert propanoic acid to 2-hydroxypropanoic acid

Posted by Devansh Mishra 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Distiguish between acetaldehyde and benzaldehyde

Posted by Dishu Pandit 6 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

S.... ????☺ 6 years, 4 months ago

Acetaldehyde give both fehling and Tollens test but benzaldehyde didn't

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S.... ????☺ 6 years, 4 months ago

Acetaldehyde is an aliphatic aldehyde while benzaldehyde is an aromatic

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S.... ????☺ 6 years, 4 months ago

Acetaldehye is Ch3-Cho and benzaldehyde is C6H5-Cho

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ANSWER

What is IUPAC name of ddt

Posted by Sakshi Kaur ? 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 6 years, 4 months ago

1,1'-(2,2,2-Trichloroethane-1,1-diyl)bis(4-chlorobenzene)

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Sakshi Kaur ? 6 years, 4 months ago

Siddharth the no. U given to me is also a part of qtn ???

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ANSWER

How are molarity and molality affected on increasing temperature

Posted by Amol Gùpta 6 years, 4 months ago

CBSE > Class 12 > Chemistry

5 answers

Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 4 months ago

Welcome

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Amol Gùpta 6 years, 4 months ago

Thanks rohit

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Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 4 months ago

Molarity is affected by temperature because it is based on the volume of the solution, and the volume of a substance will be affected by changes in temperature.

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Amol Gùpta 6 years, 4 months ago

Pleaae give a correct answer by the way thanks janhavi

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Janhavi Sharma 6 years, 4 months ago

No affect i guess but not sure

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ANSWER

Promoter

Posted by Pappu Ansari 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishi Porwal 6 years, 4 months ago

Promoter are substances which improve activity of catalyst. but they are not called as catalyst

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ANSWER

List two factors that influence the cell potential of a galvanic cell?

Posted by Vineet Sharma 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 4 months ago

ernst equation gives formula for the cell potential of the chemical reaction that takes place in a Galvanic cell.

It depends on the logarithm of Ion activity. Ion activity is proportional to the (metal or cation) ion concentration.

It depends on the temperature. It increases with temperature.

It depends on the charge present on the ions. More the charge on each ion, the more the potential.

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ANSWER

1-chloro-4-ethylchcloherane structure?

Posted by Anu Sharma 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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Classification of haloalkenes

Posted by Anu Sharma 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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Name the compound which is produced by chloramphenical

Posted by Anu Sharma 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is collodion?

Posted by Dàñïyã Ãrshãd? 6 years, 4 months ago

CBSE > Class 12 > Chemistry

4 answers

Dàñïyã Ãrshãd? 6 years, 4 months ago

Thnkew @Ankit Aryan Shivan

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Ankit Aryan Shivan 6 years, 4 months ago

It is 4%solution of nitrocellulose in a mixture of alcohol and ether.

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Dàñïyã Ãrshãd? 6 years, 4 months ago

@ Pradhum Parashar ......So why have u answered????

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Pradhum Parashar 6 years, 4 months ago

I don't knw

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ANSWER

Cbse important topics chapters wise

Posted by Sagar Dhanda 6 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Differentiate between ethanal and methanal

Posted by Prashant Tomar 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Prashant Tomar 6 years, 4 months ago

Then what will be the difference

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Madhav Garg 6 years, 4 months ago

Ethanal - C2H4O And Methanal - CH2O

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Is colligative properties are independent of nature of solute only ? Or Independent of nature of both solute and solvent?

Posted by Komal Sehwag 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Priyanshu Pandey 6 years, 4 months ago

Yes, Colligative properties are independent of nature of solute only

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What is chelate ligands/denticity?

Posted by Shikha Das 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 4 months ago

Chelation:Chelation is the formation or presence of two or more separate bindings between a polydentate (multiple bonded) ligand and a single central atom.
Denticity: Denticity refers to the number of atoms in a single ligand that bind to a central atom in a coordination complex. In many cases, only one atom in the ligand binds to the metal, so the denticity equals one, and the ligand is said to be monodentate (sometimes called unidentate). Ligands with more than one bonded atom are called polydentate or multidentate.

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Half life of a zero order reaction is 100 minute. then, after 144.4 minutes how much the concentration of the reactant will be reduced

Posted by Chhaya Bhandari 6 years, 4 months ago

CBSE > Class 12 > Chemistry