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

In H2O there is hydrogen bonding due to high electronegativity of oxygen and it's small size and hence it is a liquid but in H2S there in no H- bonding and this is bounded by weak van der waals forces. Therefore it is gas.

2Thank You

ANSWER

What are volatile solutions/substances?

Posted by Kritika Sejwal 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Simran Singh 8 years, 1 month ago

Substance have capability to go into vapour phase

1Thank You

ANSWER

cr2+ is better reducing agent than fe2+ . explain .

Posted by Vinayak Luha 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Shalini Tiwari 8 years, 1 month ago

Cr2+ is a stronger reducing agent than Fe2+. This can be explained on the basis of the standard electrode potential values E°(Cr3+/Cr2+ = –0.41 V) and E° (Fe3+/Fe2+ = + 0.77 V). Thus Cr2+ is easily oxidised to Cr3+ but Fe2+ cannot be as readily oxidised to Fe3+.

1Thank You

ANSWER

Why afbau rule is not aplicable in d and f block elements?

Posted by Vishwas Patel 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Vishwas Patel 8 years, 1 month ago

Shut your mouth if u dont know

7Thank You

Jin Kazama 8 years, 1 month ago

Kam se kam rat ko to chan se rhlo

1Thank You

ANSWER

Coordinate compound

Posted by Vishal Tiwari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

A mixture of X and Y was loaded in the column of silica. It was eluted by alcohol water mixture. Compound Y eluted in preference to compound X . Compare the extent of adsorption of X and Y on column

Posted by Vaishali Yadav 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Which lanthanoid metal exhibit +4 oxidation state

Posted by Vaishali Yadav 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Simran Singh 8 years, 1 month ago

Cerium

1Thank You

ANSWER

Calculate

Posted by Manish Choudhary 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Jin Kazama 8 years, 1 month ago

Or kuch

1Thank You

Jin Kazama 8 years, 1 month ago

Ho gya

0Thank You

ANSWER

Single?????

Posted by Sharma Saabh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Jin Kazama 8 years, 1 month ago

Best physics teacher hai

0Thank You

Jin Kazama 8 years, 1 month ago

Hmare school me hai per sirf T1 ko padate hai .

0Thank You

ANSWER

Which all break double bond - 1.PCC 2.KMnO4 3.CrO3

Posted by Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 8 years, 1 month ago

CBSE > Class 12 > Chemistry

5 answers

Ishu Chouhan 8 years, 1 month ago

I think pcc

0Thank You

Jin Kazama 8 years, 1 month ago

Tera nam thoda chota ker le page se baher jata hai

0Thank You

Jin Kazama 8 years, 1 month ago

To ------>tu*

0Thank You

Jin Kazama 8 years, 1 month ago

Double bond ka to nhi pata per waat lgane me to mahir hai

0Thank You

Jin Kazama 8 years, 1 month ago

Try it yourself

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ANSWER

Vant Hoff factor

Posted by Abdul Wadood Zaid 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Gursharanjeet Kaur 8 years, 1 month ago

Ratio of experimental value of colligative property to the calculated value of the colligative property. It is used to find out the extent of dissociation or association. Vant hoff factor= normal molar mass /abnormal molar mass

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ANSWER

How do you expalin the absence of aldehyde group in the pentaacetate of D-glucose?

Posted by Samriddhi Seth 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Glucose or sucrose are soluble in water but cyclohexane or benzene are insoluble in water . Explain?

Posted by Samriddhi Seth 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Samriddhi Seth 8 years, 1 month ago

Matlab?

0Thank You

Akash Agarwal 8 years, 1 month ago

Intermolecular H bond formation

3Thank You

ANSWER

Why cu++ is oxidising in nature and Mg+++ is reducing in nature in d block?

Posted by Anshika Rai 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Akash Agarwal 8 years, 1 month ago

To become stable Mg+++ tries to get elecrmtron to bcm stable(Mg++) I.e get oxidized and hence acts as reducing agent

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ANSWER

Why cu++ is oxidising agent and mg+++ is reducing agent in d block

Posted by Anshika Rai 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

what is the best way to prepare physical chemistry

Posted by Sharma Saabh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 8 years, 1 month ago

Do all derivation and numericals

1Thank You

ANSWER

Does PCC break double bond??

Posted by Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Jin Kazama 8 years, 1 month ago

Break up

0Thank You

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 8 years, 1 month ago

Also tell about KMnO4 and CrO3

0Thank You

ANSWER

During reaction between aldehyde or ketone with ammonia derivative ph value should be controlled why

Posted by Aman Kashyap 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Akash Agarwal 8 years, 1 month ago

Because ammonium ion may get formed which is highly deactivating grp

0Thank You

ANSWER

How to study organic chemistry....please tell the important questions in that

Posted by Sheetal Sreedaran 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Sai Thaini 8 years, 1 month ago

First Nomenclature, learn the naming reactions, Then learn the mechanism, Basic conversions Then the test for distinguishing between two compounds.

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ANSWER

is mechanism needed for board xam??

Posted by Emma Sherlocks 8 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Aditya Raj 8 years, 1 month ago

Yes

1Thank You

Garima Suyal 8 years, 1 month ago

Nahi yr

1Thank You

Shivanshu Yadav 8 years, 1 month ago

Important h yr kr k jana

2Thank You

Rochie Joshi 8 years, 1 month ago

Sometimes it is asked .yr

1Thank You

ANSWER

Cause of Brownian movement?

Posted by Jyotshna Gautam 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Varun Prajapati 8 years, 1 month ago

It has a steric effect which does not allow to settle the partical at the bottom

1Thank You

Rochie Joshi 8 years, 1 month ago

Zig zag movement ol colloidal particles.

3Thank You

ANSWER

Surface Chemistry- Lyophilic sol is more stable than lyophobic sol. Give reason.

Posted by Jyotshna Gautam 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the principle of vapour phase refining of metals?

Posted by Divyaditya Singh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Gursharanjeet Kaur 8 years, 1 month ago

In this method, metal is converted into its volatile compound and is collected elsewhere. It is then decompose to give pure metal.

0Thank You

ANSWER

Convert methylamine to ethyl amine

Posted by Akshita Gupta 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Hina Siddiqui 8 years, 1 month ago

Phle methanol mein covert karo, phir socl2 ke presence mein chlomethane bnao, then with kcn Methane nitrile is formed then finally reduction to form as given in ques

5Thank You

ANSWER

Unit Of specific conductance is

Posted by Aanand Singh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Minal Sinha 8 years, 1 month ago

Siemen per metre (s/m)

1Thank You

ANSWER

Write the structure of alkane that on ozonolysis give only ketone

Posted by Abhinay Yadav 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Is halogen group comes in functional group

Posted by Vishesh Saini 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Lila Dhar Dahal 8 years, 1 month ago

Yes, it is called halo group.

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ANSWER

Copper sulphate solution, when added to an excess of ammonium hydroxide, forms a complex compound due to....

Posted by Utkarsh Mathur 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is ellingham diagram ? Describe it in brief .

Posted by Meshu Tiwari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Sanat Zehra 8 years, 1 month ago

An Ellingham diagram is a graph showing the temperature dependence of the stability for compounds. This analysis is usually used to evaluate the ease of reduction of metal oxides and sulfides.

1Thank You

ANSWER

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