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Ďãřşháñăã Yadav ? ? ? 6 years, 2 months ago

thnx

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

+ve E° value for cu is due to the fact that sum of sublimation enthalpy and ionisation enthalpy to convert Cu to Cu2+ is so high that it is not balanced by its hydration enthalpy. - ve E° for zn is due to the fact that after removal of electrons from 4s orbitals, stable 3d10 configuration is attained. ➡️➡️ kisi ka aehsaan nhi rekhte hum ? answer ke badle answer kar diya.

ANSWER

Among the metals Fe, Zn, Pb, Ag and Pt which do not give a metal nitrate on treatment with conc. HNO3?

Posted by Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

thanks BTW nicely explain miss.

Ďãřşháñăã Yadav ? ? ? 6 years, 2 months ago

so Fe and pt will not give metal nitrate on treatment with conc HNO3.

Ďãřşháñăã Yadav ? ? ? 6 years, 2 months ago

when iron is treated with conc. HNO3 it becomes passive due to the formation of a protective layer of FeO. Fe2O3 on its surface. Pt, on the other hand being a Nobel metal does not react with conc. HNO3.

ANSWER

Will assertion reasons and paragraph based questions ask in board exam class 12

Posted by Hariom Singh 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Student Cbse 6 years, 2 months ago

yes

ANSWER

Citric acid

Posted by Melody Hanjabam 6 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

M!Ń! ?? 6 years, 2 months ago

Sandeep Tyagi Sandeep Tyagi 6 years, 2 months ago

What

ANSWER

an alkyl halide x of formula C6 h 13 CL on treatment with potassium tertiary butyl oxide gives to isomeric alkenes y and z formula of C6 h12 both alkenes for hydrogenation give 2, 3 dimethylbutane product X y and z

Posted by Tapan Pandey 6 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Solution of two volatile liquids A and B obey Raoult's law. At a certain temperature, it is found that when the total pressure above a given solution is 400 mm Hg, the mol fraction of A in the vapour is 0.45 and in the liquid is 0.65. What is the vapour pressure of the two pure liquids at the given temperature?

Posted by Rajat Pati Tripathi 6 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Total how many mechanisms ?

Posted by Tauheed Hasan 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Nisha Kaushik 6 years, 2 months ago

There r so many mechanisms in complete organic of class 12.

Tauheed Hasan 6 years, 2 months ago

No 2 mechanism there is total 5 mechanism but i dont know ?

Shreya Singh 6 years, 2 months ago

2 Sn1 and Sn2

ANSWER

Who will give answers of my questions?

Posted by K K 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Gursharn Kaur 6 years, 2 months ago

Google baba

ANSWER

What are the chemical properties of haloalkanes and haloarenes

Posted by Vishal Kumar Sahu 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Deeya Singh 6 years, 2 months ago

All the reactions of Haloalkanes and Haloarenes are their chemical properties

ANSWER

Silver atom has completely filled d-orbital but it is not a transition element.

Posted by Reetesh Kumar 6 years, 2 months ago

CBSE > Class 12 > Chemistry

4 answers

Vishal Adhikari 6 years, 2 months ago

It has fully filled valence shell in ground state but in any compound it show +2 oxidation

Gursharn Kaur 6 years, 2 months ago

The reason behind is that according to definition of transition elements Transition elements are those elements which have incompletely filled d orbitals in either free state or in its oxidarion state. So, silver does not follows this defination of transition elements.

Raman Brar 6 years, 2 months ago

According to ncrt transtion elements are those which have incomplete d-orbital in ground state or in common oxidation state

Sinchana Malagond 6 years, 2 months ago

even though silver has completely filled d orbital it is not considered as a transition element because silver exist in + 2 oxidation state. the two electrons are removed from the d orbital and for stability purpose and the d orbital becomes in completely filled thus making it a not a transitional element.

ANSWER

Organic chemistry perfect kisko aati h Himmat h???

Posted by Tannu Madaan 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Nisha Kaushik 6 years, 2 months ago

Perfect to Shayad koi ni h.

Řøhăň Řąjpůť ✌️✊ 6 years, 2 months ago

bhen aese bolo gi toh jisko aata hoga vo bhi nhi help karega question hai post kar do aata hoga toh answer kar he dunga.

Nitish Mahto 6 years, 2 months ago

Mere ko

ANSWER

Kisiko isolated enyne mechanism bhi nhi aata ???

Posted by Tannu Madaan 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Gursharn Kaur 6 years, 2 months ago

I can help u in 1 or 2 days Now i am busy

ANSWER

Ethyl bromide has high BP than ethyl chloride

Posted by Nithin Nirel 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Rathi 6 years, 2 months ago

Molecular mass of ethyl bromide is higher than molecular mass of ethyl chloride and vander waal force is directly proportional to molecular mass. Thus ethyl bromide has more interaction between molecules to held it tight resulting in high boiling point.

ANSWER

Describe the shape and magnetic behaviours of the following complex [Ni(CN)4]2-

Posted by Kumar Pawar 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Pragati Gola 6 years, 2 months ago

CN is STONG field ligand ,C.N-4, hybridisation-dsp2,magnatic behaviour-diamagnatic ,magnetic moment-0.

Vishal Adhikari 6 years, 2 months ago

Square planar and diamagnetic in nature

Rishabh Rathi 6 years, 2 months ago

It is dsp2 hybridised since CN is an strong ligand and configuration is d8 its shape will be square planar. It is diamagnetic in nature since cn will pair the unpaired electron.

ANSWER

Agar himmat h to batana Mechanism of isolated enyne in organic chemistry (

Posted by Tannu Madaan 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Ajendra Singh 6 years, 2 months ago

Tumhari himmat kaha gayi

ANSWER

Anamolous behaviour of amino acid

Posted by Vaibhav Killedar 6 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

A compound forms h.c.p structure.calculate the total number of void in 0.5 mol of it

Posted by Mintu Bez Baruah 6 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Swartz rxn

Posted by Tannu Madaan 6 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Chetna Regar 6 years, 2 months ago

When alkyl chloride or alkyl bromide react with Agf,Hg2f etc. there Will be form alkyl Floride

Unique Girl.. ? 6 years, 2 months ago

What

ANSWER

What is mutarotation? Explain with example.

Posted by Deeya Singh 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 2 months ago

Mutarotation refers to the spontaneous change in the optical rotation of a freshly prepared solution of an optically active compound with time. All monosaccharides exhibit mutarotation in aqueous solutions.
For example: The specific rotation of a freshly prepared solution of alpha-D-glucose gradually decreases from +112 to +52.7 while that of beta-D-glucose increases from +19 to +52.7 with time. This change in specific rotation of an optically active compound in solution with time, to an equilibrium value, is an example of mutarotation.

ANSWER

What is carbohydrate?

Posted by Rahul Bidiyasar 6 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sohan .G 6 years, 2 months ago

Carbohydrates may be defined as optically active polyhydroxy aldehydes or ketones or the compounds which produce such units on hydrolysis

ANSWER

When 0.1 mole of MnO4²- is oxidised, the quantity of electricity required to completely oxidise MnO4²- to MnO4-

Posted by Diana Sagolsem 6 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Harsh Mishra 6 years, 2 months ago

Copied it from Zigya.com Nice Work, Gaurav Bro.......

Gaurav Seth 6 years, 2 months ago

Answer is: 9650 C

Explanation is given below:

As per the equation, for 1 mole of MnO₄^2-, 1F of electricity is required. Thus, for 0.1 mole of MnO₄^-, 0.1 F of electricity is required.

Since, 1 F = 96500 C
0.1 F = 0.1 x 96500 C
= 9650 C
Hence, 9650 C of electricity is required to completely oxidise MnO₄^2- to MnO₄^-

ANSWER

Conversion of Ethanol to but-1-yne

Posted by Jaya Mishra 6 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the structure of glucose ?

Posted by Ritesh Gupta 6 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Gursharn Kaur 6 years, 2 months ago

C2H6O6

ANSWER

Carbon can be extracted by hydrometallurgy but not zinc why ......

Posted by Amol Gùpta 6 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Ron Vineetahuja 6 years, 3 months ago

because Zinc has high reduction potential

Uday Mann 6 years, 3 months ago

Zinc is highly reactive , metals having lower reduction potentials than zinc such as Mg, Ca, K, etc. are required. ... As a result, these metals cannot be used in hydrometallurgy to extract zinc.

ANSWER

Acylation of ethylene glycol

Posted by Mani Ganesh 6 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Example of disolution

Posted by Vivek Dubey 6 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Vivek Dubey 6 years, 3 months ago

Benzene and toluene

3Thank You

ANSWER

Preparation of haloalka e

Posted by Imran Khan 6 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Yashvi Bhardwaj 6 years, 2 months ago

1. From alcohol a) lucas reagent (anhy.Zn and conc. HCl) b) darzen reagent with SOCl2 c) PCl5 d) PCl3 2. From alkene ( markonikov and anti- markonikov rule ) 3. From alkane by chlorination 4. From grignard reagent 5. Saytzeff's rule 6. Reaction silver salt of carboxylic acid