# All Questions

30,688 questions
Filter by
Sorted by
Tagged with
28 views

### Partial dissolution of non-polar solutes in polar solvents

I have learnt that in order for dissolution to occur, the solute-solvent intermolecular forces must be strong enough to overcome the solute-solute and solvent-solvent forces. However if this is the ...
60 views

### H and H- atomic and ionic radius

A hydrogen anion has a bigger radius than neutral H . Why is this happening ? I mean both electrons exist at the same shell so this is not it. Both H- and H have 1 proton so this is not it as well . ...
523 views

46 views

### Why the formation of PH4+ is difficult compared to NH4+?

My textbook asks this as an objective question. What I had in mind was that the lone pair on phosporous was more distributed as compared to nitrogen(since nitrogen is more electronegative and smaller ...
13 views

### Spectroscopy and Chromatography [on hold]

25 cm^3 of an unknown solution has an absorbance of 0.3. Added is 5 cm^3 of a solution of the same compound (concentration = 10 ppm) and absorbance is now 0.34. Calculate the original unknown ...
25 views

### Ease of formation of 3 membered heteroatomic rings [on hold]

A three membered ring is easier to form than a four membered one, although the former has a larger ring strain.. Why???
15 views

### How to extract melanin from human hair [on hold]

I am working on a project wherein I am studying various properties of human hair and its utilization..I would like to know method by which we can extract melanin from human hair. Can anyone suggest ...
18 views

### Is the 1,4-adduct of carbonyl compounds ever a major product over the 1,2-adduct?

If, say, propenal undergoes nucleophilic addition of hydrazine, will the 1,2- adduct or the 1,4-adduct be preferred? Why? There is an obvious reasonace structure with an electrophilic beta carbon so ...
31 views

### What would the transition state look like for the following reaction? And a question on Gibbs free energy of the Transition State [on hold]

The alkaline hydrolysis of ethyl acetate. Also wanted to know whether the addition of solvent would have an impact on the Gibbs free energy value of the Transition State since the transition state ...
28 views

### What is meant by pure solids or pure liquids? [duplicate]

In by book, under the topic Heterogeneous Equilibrium it is given For pure solid and pure liquid, active mass is taken to be unity, i.e., 1 as they remain constant throughout the reaction. Could ...
20 views

### Why is the Ionization Energy of Germanium less than that of Silicon?

I've read that in the 13th period, Ga has higher I.E. than Al because of the filling of the d-orbitals in Ga. The text said they have low penetration,hence they don't shield well and the effective ...