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

Postulates of Werner's coordination theory: (1) Metal shows primary valence (ionizable, oxidation number) and secondary valence (non ionizable, coordination number). (2) Coordination number (secondary valence) is fixed for every metal. (3) Negative ions satisfy primary valence and negative ions or neutral molecules satisfy secondary valence. (4) Secondary valencies are directional in nature and determine stereochemistry of complex.

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Write formula for the following compound 1. Annine chlorobos (elhylenediamine) cobalt (III) ion

Posted by Triloksingh Solanki 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Nikki ... 5 years, 3 months ago

I think this compound is wrong

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CH3-CH(Cl)-CH3 reacts with Na/dry ether......... write the product formed???

Posted by Nihira Nihira 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sanjana Dua?????❣️ 5 years, 3 months ago

The product is hexane(CH3-CH2-CH2-CH2-CH2-CH3) This reaction is example of wurtz reaction n(CH3-CH2-CH3)reacts with Na/dry ether forms n(CH3-CH2-CH2-CH2-CH2-CH3) I hope it's help u?✌️

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[fe(cn) 6] ka iupsc name

Posted by Jyoti Sahu 5 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Divya Chouhan 5 years, 3 months ago

Hexa cynoferrate

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Rhea Sharma 5 years, 3 months ago

Hexaphitochlorine sulphur 2O3

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Krati Varshney 5 years, 3 months ago

Hexacyanoferrate

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Phenol to picric acid

Posted by Nitesh Kerketta 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayush Arya 5 years, 3 months ago

To convert phenol to picric acid we have to react phenol with bromine water so that it's for 2-4-6tribromophenol which is called picric acid which is very reactive in nature

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Hi frd. As board is near I am forgetting to study plz help me???

Posted by Arsh Sandhi 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Deepak Soni 5 years, 3 months ago

Gaand mara

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Can u pls help me in numericals of chemistry

Posted by Vishal Chhabra 5 years, 3 months ago

CBSE > Class 12 > Chemistry

4 answers

Sanjana Dua?????❣️ 5 years, 3 months ago

once u send ur problem we all present at every moment to solve ur problem

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Sanjana Dua?????❣️ 5 years, 3 months ago

U can send ur questions we help u

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Usha Yadav 5 years, 3 months ago

How we May help you ?????? We want to help you but HOW???? Tell Us...............

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Vishal Chhabra 5 years, 3 months ago

Of class12.. CBSE

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Is telegram a good app for study?

Posted by Bhavishya Kumar 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Kanishk Gupta 5 years, 3 months ago

Use krke Dekh lo

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Ʌ0m(NH₄OH)

Posted by Prarthana Jacob 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sanjana Dua?????❣️ 5 years, 3 months ago

Can u plz the send question again I can't understand

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Why is CO a stronger ligand than CL-???

Posted by Hrishabmishra Xiib Mishra 5 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Hrishabmishra Xiib Mishra 5 years, 3 months ago

Thanks you .

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Tanisha Yadav 5 years, 3 months ago

CO is a stronger ligand than Cl ion because CO has double bond in between and has strong posively charged and negatively charged ends whereas Cl ion has one negative charge and positive inductive effect.

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Tanya ?? 5 years, 3 months ago

CO is a stronger ligand than Cl ion because CO has the double bond in between and has strong positively charged and negatively charged ends whereas Cl ion has one negative charge and positive inductive effect.

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ANSWER

Why HCl and HI do not take part in anit-markovnikov's rule based reaction

Posted by Balaji Shakthi Kumar B 5 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Tanisha Yadav 5 years, 3 months ago

In the presence of organic peroxides, bromides will take part in radical based reactions. Fission of the peroxide O-O linkage will induce a Br radical which behaves differently to Bromide, by adding to the less substituted side of the alkene (anti - markovnikov). HI and HCl do not do this for energetic reasons. The addition of Cl and I radicals to the alkene in an anti-markovnikov fashion is an endothermic reaction and therefore unfavourable. Without the presence of peroxide, all hydrogen halides will add according to the markovnikov rule.

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Yogita Ingle 5 years, 3 months ago

The addition of Cl and I radicals to the alkene in an anti-markovnikov fashion is an endothermic reaction and therefore unfavourable. Without the presence of peroxide, all hydrogen halides will add according to the markovnikov rule.

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what is coordination no of sulphur

Posted by Harshim Kaur 5 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Tanisha Yadav 5 years, 3 months ago

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Iqbal Singh 5 years, 3 months ago

0Thank You

Tanya ?? 5 years, 3 months ago

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Molarity of distill water ??

Posted by Sandhya Bhandari 5 years, 3 months ago

CBSE > Class 12 > Chemistry

5 answers

Sandhya Bhandari 5 years, 3 months ago

Thank you guys

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Usha Yadav 5 years, 3 months ago

M= no.of moles/volume of solution in Litre =55.55 for Distill Water

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Usha Yadav 5 years, 3 months ago

55.55 M

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Ayush Vishwakarma?? 5 years, 3 months ago

55.5

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Tanya ?? 5 years, 3 months ago

55.348 M

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What is the Rank of Hexagonal Unit Cell

Posted by Garima Sharma 5 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Tanisha Yadav 5 years, 3 months ago

The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12and contains 4 atoms per unit cell. The body-centered cubic (bcc) has a coordination number of 8 and contains 2atoms per unit cell.

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महाराज यश 5 years, 3 months ago

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Which is a "W/O" type emulsion

Posted by Tannu Singh 5 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Vikas Shukla 5 years, 3 months ago

Oh it's not oil it's cream. Vo flow flow me likh diya. Maaf krna Zara idhar udhar Nikl jata hu ?

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Vikas Shukla 5 years, 3 months ago

We know that an emulsion is colloidal Sol of liquid in liquid. In W/O type emulsion water is dispersed in oil i.e. Dispersion phase = water and Dispersion medium = oil .Ex. Butter and oil.

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Calculate the equilibrium constant of the reaction: Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)

Posted by Resma Putel 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Seth 5 years, 3 months ago

A n s w e r is :

4.0 x 10¹⁵

Explanation :

For a cell reaction in equilibrium at 298 K,

where KC = equilibrium constant, n = number of electrons involved in the electrochemical cell reaction.

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A compound of two elements A & B forms face centered cubic arrangement . A atoms occupy at all the corners except 2 and B atoms at all the face centre the empirical formula of the compound is .......????❓❓❓❓❔▫▫▫▫▪▪

Posted by Shraddha ✨✰✰ 5 years, 3 months ago

CBSE > Class 12 > Chemistry

5 answers

Shraddha ✨✰✰ 5 years, 3 months ago

Sorry bhaiya vo to me bhul gai ki divide bhi ho sakta hai. Tq bahiya

1Thank You

Ayush Vishwakarma?? 5 years, 3 months ago

Divide kro yaar aa jayega kya yaar...jzb krti ho

2Thank You

Vikas Shukla 5 years, 3 months ago

Answer is AB3 because u can see that 12 is a multiple of 4 so on simply dividing the formula by 4 u will get AB3.

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Shraddha ✨✰✰ 5 years, 3 months ago

Thank you so much ........,but , iske options me to ye option hai hi nahi .? Options →a)AB3 b)A2B3 c)AB4 d)A3B3

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Ayush Vishwakarma?? 5 years, 3 months ago

Formula of compound is (A4B12)

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Is moscovium imp for 12 board exams 2021?

Posted by Ayushi Kurmi 5 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Ayushi Kurmi 5 years, 3 months ago

Ok ??

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Vikas Shukla 5 years, 3 months ago

I don't think so. I haven't encountered any question related to it. But still just keep a general idea about it like why it's chemistry is unknown. It isn't tough. No one knows future there isn't any question related to it but what if you come across one? So just keep a small and general idea about it.

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ANSWER

what is she

Posted by Ritu Kaur 5 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Tanya ?? 5 years, 3 months ago

E° cell = E°right -- E° left

1Thank You

Iqbal Singh 5 years, 3 months ago

standard hydrogen electrode

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Ritu Kaur 5 years, 3 months ago

standard hydrogen electrode

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A sample of drinking water was found to be severely contaminated with chloroform (CHCl3) supposed to be a carcinogen. The level of contamination was 15 ppm (by mass). Determine the molality of chloroform in the water sample.

Posted by Mahendra Rathor 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Vikas Shukla 5 years, 3 months ago

1.2 *10^-4 molal. Take 15g of chloroform in 10^6 g of water and then simply apply the formula. U will get the same answer.

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ANSWER

Predict the stereochemistry of product formed if an optically active alkyl halide 1 undergoes SN2 Mechanism.

Posted by Payal Kokane 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Khushi Jaiswal 5 years, 3 months ago

Racemic mixture of enantiomers is formed. If one of the product is dextrorotatory, then other will be laevorotatory.. hence net optical rotation will be zero.

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What is the boiling point of alcohol Ans right is

Posted by Raja Yadav 5 years, 3 months ago

CBSE > Class 12 > Chemistry

5 answers

Vikas Shukla 5 years, 3 months ago

Okay it's your choice! ?

2Thank You

Raja Yadav 5 years, 3 months ago

I am not see in Google I am see only book got it 80°C is a right ans

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Vikas Shukla 5 years, 3 months ago

You can verify your answer from NCERT textbook of chemistry. Boiling points of different solvents are given in kelvin on page no. 53 in new edition. According to NCERT b.pt. of alcohol i.e. ethanol is 78.37°C and b.pt.of benzene is 80°C. So it's u who is wrong. If u still don't believe then u can search on Google. Hope this will help u in getting out from your misconception.

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Raja Yadav 5 years, 3 months ago

Right answer 80° C

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Raja Yadav 5 years, 3 months ago

Robinpreet your worng

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ANSWER

adsorbate

Posted by Dikshu Dikshu 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishikesh Acharya Mj Bjr 5 years, 3 months ago

Definition-it is the substance being adsorbed in the surface of another substance..

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Why there is no interface between gases?

Posted by Anisha Kabsuri 5 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 5 years, 3 months ago

When two phases meet, the boundary between them is known as an interface.

We have the following interfaces :

1) Solid - Solid interface

2) solid - liquid interface

3) liquid - liquid interface

4) Gas - liquid interface

5) Gas - Solid interface.

We do not have a gas - gas interface because gases diffuse rapidly and quickly therefore we cannot tell their interface.

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What is action on silver cyanide on eyeful bromide

Posted by Soumya Y Belli 5 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Akanksha Kumari 5 years, 3 months ago

When ethyl bromide (haloalkane) reacts with alcoholic solution of silver cyanide, it results in the formation of ethaneisonitrile (alkaneisonitrile) via mechanism. The attack of nucleophile in this case occurs through nitrogen atom.

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Rishikesh Acharya Mj Bjr 5 years, 3 months ago

May be. Double displacement will done and order of reaction be 3.

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Soumya Y Belli 5 years, 3 months ago

What is action on silver cyanide on ethyle bromide

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What is the boiling point of alcohol Ans

Posted by Raja Yadav 5 years, 3 months ago

CBSE > Class 12 > Chemistry