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ANSWER

Kisi ko instantaneous and average rate of reaction ka graph samaj aa gya kya (page 95 chemical kinetics). Agar samaj aa gya to batana plzzzzzzzzzzzz

Posted by Pankaj Sihag 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Nishtha Pandya 8 years ago

Aarey reactants will decrease with the time so issiliye uska graph will go down aur kisi particular time pe slope nikal uss graph ka is instantaneous rate of reactants but since it will come in negative as the slope is negative so to make the rate positive the negative sign is used -dR/dt As reactants decrease product rate increases so it has a positive slope so dP/dt the slope of the graph is instantaneous rate for products Aur instantaneous rate me dt tends to zero for very small interval so in instantaneous rate limit of dt tends to zero ?

Sidharth Verma 8 years ago

Time k sath concentration of reactant dec. Hota hai aur product ki conc. Inc hoti hai. Baki Jo values likhi hai graph par that does not matter much only few are important .

ANSWER

Why primary cell become dead after sometime

Posted by Pankaj Sihag 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Go Pi 8 years ago

Become the ions get diffused. Inside the cell the ions move or shifts over sometimes. So they become unfit to use, I.e they die

Kriti Mishra 8 years ago

Becoz they lost the capacity to divide and get differentiated to perform specialised function....

ANSWER

What is slag?????

Posted by Diya Dyan 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Shruti Agarwal 8 years ago

The fusible compound formed by the combination of flux and gangue.

ANSWER

p, d and f block.. ye chapters nhi hua h mere.. esme se kuch important topics jisse easy questions ban jaye.. plzzz help kardo koi

Posted by Zenil Mehta 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Go Pi 8 years ago

Be thorough with the example questions.

Rishab Sharma 8 years ago

D and f me atomic numbers yaad krlo d valo ke and physical properties ... Iske ilava oxidation action of K2Cr2O7 and KMno4 boht hai

Jasleen Kaur 8 years ago

NCERT Q. Kr le

Jin Kazama 8 years ago

Sirf conceptual question kr l ???

ANSWER

Kitne chapter ho gaye?

Posted by Jasleen Kaur 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Rishab Sharma 8 years ago

8 ho gye solution kinetics aur electro krna hai ajj

Jasleen Kaur 8 years ago

Divya Sen 8 years ago

Bhai 17 hai hi ni 16 hain chapters tune kaha se utha liya ek extra???

Jin Kazama 8 years ago

17 k 17 ho gye ???

ANSWER

What is the use of Ellingham diagram?? What does it show??

Posted by Diya Dyan 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Rishab Sharma 8 years ago

To choose the reducing agent its important however kaafi years se ispe question ni aaya to itni b important ni hai

ANSWER

Why does the copper obtained in the extraction from copper pyrites have a blistered appearance?

Posted by Divya Sen 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Divya Sen 8 years ago

Thnx,well actually i know the ans now but at that time when i asked the que i wasn't.

Fousiya Shajahan 8 years ago

Because of the evolution of Sulphur dioxide gas

ANSWER

What is solutions

Posted by Mayank Painkra 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Jin Kazama 8 years ago

in which solute and solvent are non-reacting towards each other ???

Abhinay Ab 8 years ago

Solutions r homogeneous mixture of two or more substance.

ANSWER

What do u mean by depression in freezing point?

Posted by Rupinder Ruby 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Aniket Yadav 6 years, 2 months ago

It is the decrease in freezing point when a non volatile solute is added to solvent

Diya Dyan 8 years ago

Non volatile solute....

Diya Dyan 8 years ago

Depression of freezing point means decrease in freezing point when a non volatile solvent is added to a solvent

ANSWER

How will you convert benzene to benzoquinone ?

Posted by Salman Khan 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Shruti Agarwal 8 years ago

Reagent Na2Cr2O7 And H2SO4

Abhinay Ab 8 years ago

Spelling change kr ke or kya?

ANSWER

Hydrolysis of ethyl acetate important to learn or not from chapter chemical kinetics

Posted by Sidharth Verma 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Rishab Sharma 8 years ago

Derivations and numericals are enough but cant gurantee

ANSWER

Similarity between physisorption and chemisorption?

Posted by Kevin Sunny 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Vineet Kumar Gupta 8 years ago

both are exothermic processes

ANSWER

?????

Posted by Jin Kazama 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Jin Kazama 8 years ago

Pr hello ???

Megha Kumari 8 years ago

Hlo

ANSWER

What is depressant?

Posted by Diya Dyan 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Mishra 8 years ago

The substance which prevents certain typr of particle from forming froth with the bubbles are called depressant

ANSWER

What is difference between fcc,hcp,and ccp?? ( dont tell me their full form )
What is defects?
What is the use of coordination compound ?
What is colloidian?
What is difference between precipitate and coagulate?

Posted by Hitesh Kumar 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Nishtha Pandya 8 years ago

Hcp fcc and ccp are the same

Jin Kazama 8 years ago

?????

ANSWER

Kitna Rutt liya sub ne

Posted by Hitesh Kumar 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Unique Person Arupitw 8 years ago

Full ncert, question bank

ANSWER

Hello gys

Good morning 

How is your preparation going?

Is there any trick to learn D and F block element? ??

Please help me !!!!!!!!

Posted by Hitesh Kumar 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Go Pi 8 years ago

Example quetions are very important.

Jin Kazama 8 years ago

Eak hai bus ghot k pija ???

Unique Person Arupitw 8 years ago

???

ANSWER

What is the iodoform reaction??

Posted by Sanket Sarkar 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Go Pi 8 years ago

Reagent is NaOI . You'll get CHI3 (idoform--yellow ppt) if the reach aldehyde or Kenton have CH3 group adjusant to the carbon having double O. I the case of Ch3-c(=O)ch3 +NaOI3 --> ChI3 + ch3c(=O)ONa

ANSWER

What is electron sea belt

Posted by Sinjini Biswas 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Value based question konse chapter we ayega

Posted by Namrata Bhatia 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Priya Prakash S 8 years ago

Chemistry in everyday life

Rishab Sharma 8 years ago

Chemistry in everyday life

Aisha Grewal 8 years ago

May be biomolecule

4Thank You

ANSWER

Conversion from ethene to etane

Posted by Ashu Priya 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Aisha Grewal 8 years ago

????

Aisha Grewal 8 years ago

Vo sis h

Ashish Singh 8 years ago

Bro you can also anti markoniffs rule in presence of h20

Aisha Grewal 8 years ago

+h2... In presence of ni/pd

ANSWER

What type of solid is rubber

Posted by Sahil Sharma 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Mishra 8 years ago

Amorphus

ANSWER

Name reaction

Posted by Shreyansh Jain 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aisha Grewal 8 years ago

Take help from book

ANSWER

Define wurtz reaction

Posted by Nikhil Das 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Ayush Bansal 8 years ago

When we take 2 moles of alkyl halide and react it with 2 moles of sodium metal in presence of dry ether , we get an alkane . This reaction is known as wurtz reaction.

ANSWER

What is polar

Posted by Abhishek Singh 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Abhishek Singh 8 years ago

Molecules of organic halogen are generally polar. What does it mean here. Polar??

Ayush Bansal 8 years ago

Polar kya?

ANSWER

Convert ethanol to acetone.

Posted by Ashish Singh 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aisha Grewal 8 years ago

C2h5oh+kmno4------>ch3cho+ch3mgbr--->ch3chomgbrch3+hydrolysis---->ch3ch(oh) ch3+kmno4---->acetone

4Thank You

ANSWER

why cannot Vitamin C be stored in our body

Posted by Ayushi Tiwari 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Ayushi Tiwari 8 years ago

Thnx

Aisha Grewal 8 years ago

It is water soluble

Ayushi Tiwari 8 years ago

Okk...Thanku

Rishab Sharma 8 years ago

Because it gets out through urine

ANSWER

Why osmotic pressure is considered better than other colligative properties to find molecular mass?

Posted by Abhinay Ab 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Ishita Gaur 8 years ago

Also the parameters we use while measuring the pressure have high numeric values ...So the chances of error are less

Ayushi Tiwari 8 years ago

Osmotic pressure can be measured at room temperature while other colligative properties need either low or high temperature condition

ANSWER

Sir I fail in class 12 in physic what I will do

Posted by Vishal Awana 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Ritu Gupta 8 years ago

yaa paper bakwaas tha kuki hmne jitni tyrri ki thi usse bhut niche k level ka aaya and who asks ray diagram in 12 th paper?

Rishab Sharma 8 years ago

Paper was average but unexpected maine yrr itna prepare kiya ... Huh koi mirror formula ki derivation puchhta hai .. It was like a joke and numericals were more than 15 marks