Incorrect URL accessed!!!!

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What type of questions asked in chemistry practical?

Posted by Mansi Gupta 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Septima Ravenclaw 6 years, 10 months ago

Mainly about the project and the chapter you know completely

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Explain Depression of freezing point?

Posted by Anusha Subba 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 10 months ago

Freezing point of a substance is the temperature at which the vapour pressure
of the substance in its liquid phase is equal to the vapour pressure in the solid phase.
If the vapour pressure of the solution is equal to the vapour pressure of the pure solid solvent then the solution freezes.
According to Raoult’s law, addition of non-volatile solute decreases the vapour pressure of the solvent and would be equal to that of solid solvent at lower This decreases the freezing point of thesolvent.
The decrease in the freezing point = ΔT_f= T_f– T_f⁰. This is known as depression in freezing point.

T_f⁰ = freezing point of pure solvent

T_f⁰ = freezing point when non-volatile solute is dissolved

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Rate constant

Posted by Saras Mishra 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Copper can be extracted by hydrometallurgy but not zinc.why?

Posted by Ghanshyam Yadav 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayush Mangla 6 years, 10 months ago

Because zn looses oxygen

ANSWER

Named rection will important like sand...rs reaction

Posted by Tyson Yadav 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Kim Jong 6 years, 10 months ago

Yeah

ANSWER

NH3 is more basic than PH3 why

Posted by Sonu Kundu 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Seth 6 years, 10 months ago

Basically NH₃ is a base due to the lone pair of electrons present on the Nitrogen atom which is available for donation. On the other hand PH₃ is also a base but its basic character is less than that of NH₃ because the nitrogen in phosphorous have lone pair of electrons that are not readily available for donation.

Also the P-H bonds are weaker than N-H bonds, so there’s not as much compensation for protonating PH₃. This is a result of the inert pair effect, seen in heavier elements.

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Nobody have answered my question

Posted by Sriyanshi Sharma Sharma 5 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Amandeep Kumar 6 years, 10 months ago

What was your question

ANSWER

How to understand and do conversions

Posted by Honey Sharma 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Papa . 6 years, 10 months ago

You have to learn all the reactions with reagents, reactants and respective products... Then u have to do conversions by first drawing the structure of the given reactant and product. U have to analyse what is the change that actually took place in the reactant... Then think of the reagents which matches with it... U can initially use ur books and slowly u will satrt analysing everything yourself and find the change.. This is how I started liking interconvertions... Initially I too had same problem... Try it out... ALL THE BEST! !

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What is the validity of Freundlich isotherm

Posted by Vatan Keshri 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why sn1 show racemisation

Posted by Vishal Singh 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Pallavi Pradhan 6 years, 10 months ago

When carbocation is formed in the process of sn1 there are two possibilities of attack for an attacking species, backside or front and thus both the products equally possible thus racemisation is very frequent in sn1

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If i live in haryana which region paper will i get - delhi or all india region please hurrily give an answer , its urgent

Posted by Sonam Malik 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Ratan Lal 6 years, 10 months ago

I think U get all india Region paper

Gaurav Kushwaha 6 years, 10 months ago

All india region

ANSWER

Steps to convert butane1ol to but1 ene

Posted by Zinia Jawa 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Teekshan Heera 6 years, 10 months ago

do dehydration of butanol with acid catalist like h+ and write -h2o just with it

Purnima Verma 6 years, 10 months ago

Elemination reaction

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To analyse the cation and anion in given

Posted by Vishal Kumar 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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What is the magnetic moment if ce3+ ion?

Posted by Neha Tiwari 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why...blood is..-vely charged colloid?

Posted by Shivam Singh 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Amorphous solids are known as-

Posted by Punit Jangir 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Sneha Bansal 6 years, 10 months ago

Pseudo solid / false solid / supercooled liquid

Anki Kaushik 6 years, 10 months ago

Supercooled liquids

ANSWER

Important topic for p bloacks

Posted by Amit Dubey 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Which types of elements are show "inert pair effect" ??

Posted by Mayank K. Mahour 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Priyanshu Shahi 6 years, 10 months ago

Inert pair effect mostly shown by 15-17 group elements

ANSWER

What is cinnamaldehyde

Posted by Himanshu Raj 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Convert benzaldehyde to benzoic acid

Posted by Himanshu Raj 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Lokesh Sharma 6 years, 10 months ago

Benzaldehyde on treating with aq.Br2 give benzoic acid

ANSWER

why zns can't be roasted

Posted by Prince Shah 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Arpan Basu Sachdeva 6 years, 10 months ago

It can be roasted

ANSWER

Kya kise ne polymer pr project file bnai hai

Posted by Sriyanshi Sharma Sharma 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Pallavi Pradhan 6 years, 10 months ago

Vulcanisation is addition of some external substances like sulphur to the natural rubber to make it efficient, prevent its easy softening on heating, prevent its easy mixing in organic solvents

Sriyanshi Sharma Sharma 6 years, 10 months ago

Can you explain vulcanisation of rubber

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Mere teacher HR Tiwari ne p block 2 din me khtm kiya ... Kya itna pardhna sufficient tha..? Plzz help ? kya mujhe aur pardhna chaiiye ya nahi?

Posted by Aditya Roy 6 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Amandeep Kumar 6 years, 10 months ago

Its your fault ..why you have taken admission in such school where syllabus is not complete

Shubham Singh Shrinet 6 years, 10 months ago

Sriyanshi Sharma Sharma 6 years, 10 months ago

Agr tumhe sare topic clear nhi hai too padho bcz itss 8

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Composition of iron (ll)oxide actually varies in the range from Fe0.93Oto Fe0.96O why?

Posted by Sanjana Roat 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Ml Sachdeva 6 years, 10 months ago

Due to defects in Crystal structure

ANSWER

How to make our chemistry exam easy

Posted by Sandrose Alex 6 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Sneha Bansal 6 years, 10 months ago

By prepare , practice,perform

Arpan Basu Sachdeva 6 years, 10 months ago

Physical ki practice and baki toh kchh bhi nhi h bro.

Yash Saxena 6 years, 10 months ago

By studying

ANSWER

Is this app helpful for gaining 55+ marks in any subject ?

Posted by Priyadarshan Kumar 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Arpan Basu Sachdeva 6 years, 10 months ago

If you have already read, understood only then it will be helpful to revise, and test yrself

Amandeep Kumar 6 years, 10 months ago

ANSWER

Why lather gets hardened on tanning

Posted by Promila Singhal 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Arpan Basu Sachdeva 6 years, 10 months ago

Google it