Recently Active Chemistry Questions

Radium disintegrates at an average rate of 2.24*10-3 alpha particles per minute. Each alpha particle takes up 2 electrons from the air and become a neutral He atom. After 420 days,He gas collected was 0.5 ml,measured at 27°C ...

We know an unit cell is something that has all the characters of the entire solid.. or in other words, it is the prototype for the entire solid.. We also know that in CCP we observe ABC-ABC layering.. Can you show ABC-ABC lay ...

how much ever i read my notes...eventually 10 out of 50 of my answers come out to be wrong! i think im perfect with the theory..please help me out guys ...

" Sulphur stabilizes charge on β - C more than it does on α - C, while Oxygen stabilizes the Charge on α - C more than it does on β - C " Why? Source: 'Clayden' ...

QUES. how many mole of electrons are present in 2.24g od the ion (S4O62-) ...

What is the shape of IBr2- ? V-shaped? Explain the hybridisation of S in SO2? ...

1. Why is formic acid more acidic than Benzoic acid? ...

1. Reaction and mechanism of : CH3-CH=CH-CH2-OH ----------------> (A) SOCl2 Find (A) and it's structure? ...

Which will give Iodoform test : *Image* ...

is the following compound aromatic?how to tell if such a compound would be planar or not? *Image* ...

can someone please suggesst me a boook on chemistry for studying the topics like gaseous state, stoichiometry nd all please...... suggest.... ...

1. Is the following substitution reaction feasible? R-Ph + CH3- → R-CH3 + Ph- 2. Compare the rate of reaction by SN1 mechanism: a) *Image* b) *Image* 3. State whether the following statement is true or false : Hyperconjugat ...

what is meant by absolute temperature of a gas? what is the differene between normal temp nd absolute temperature? ...

i saw dis question in j.d.lee...there isn't any answer given... it says-a transition element usually exhibits higher oxidation state in its fluorides than it does in its iodides. a detailed explanation will b of great help.:) ...

Ques. Pure O2 diffuses through an aperture in 224 seconds. whereas a mixture of O2 and another gas containing 80 % O2 diffuses from the same in 234 seconds. What is the molecular weight of the gas? ...

can some1 please suggest me a good book for organic chem having many questions ( with hints or solutions) and fairly decent theory...for theory mainly ill refer my notes ...i need something for practice...and yeah solutions/h ...

Why HClO3 Behaves as a stronger acid than HClO? Can anyone explain me the Slater's Rule of Effective nuclear charge? ...

Whoever has finished studying the whole syllabus of IIT JEE can just check out the extended periodic table......... *Image* ...

which is more activated? ANILINE OR PHENOL.? my friend asked this from me. he'll tell answer tomorrow...... thanks ...

1. If the slope " Z (compressibility factor) vs " P " curve is constant ( Slope = π/492.6 atm-1) at a particular temperature (300 K) and very high pressure, then calculate the diameter if the molecules? 2.The density of vapo ...

what types of bonds does d and f orbitals form????? i mean to ask, sigma or pi.......... if we see a book regarding differences in both, point is sigma formed by 3 types(u wud b knowing). pi by 1 type only... but there is no ...

A volume V of a gaseous hydrocarbon was exploded with excess o2 and after cooling a contraction of 2.5 times was noted. A further contraction of 2 twice the volume of hydrocarbon was noted in presence of molten KOH. The molec ...

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We were being taught about BENZENE SUBSTITUENTS EFFECT ON ITS REACTIVITY-An INDUCTIVE APPROACH! My teacher said it is quite obvious that "INDUCTIVELY" methyl group donates electrons to benzene ring! My doubt:How obvious is th ...

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hi all! I am not able to understand what's a Lewis acid and a Lewis base. tell me if these are Lewis acids or Lewis bases and tell me the reason. HCl, H2SO4, H3PO4, CO2, HCN. my approach: first 3 I'm not able to decide. 4th o ...

the penetrating power of protons is (a) greater than neutrons (b) lesser than electrons (c) greater than elecrons (d) none of these ...

Is the unit of molar conductance and molar conductivity same? My book says that the unit of the former is Scm2mol-1 which is the unit of molar conductivity. Any ideas? ...

With a change in hybridisation of the carbon bearing the charge, the stability of a carbanion increase in the order : ( arrange sp, sp2, sp3) It should be sp3>sp2>sp because of the repulsion of pi electrons. But the ord ...

This question relates to dissociation of Methanoic Acid (HCOOH) to Methanoate ion (HCOO-) in H2O Solvent. HCOOH + H2O -> HCOO- + H3O+ A book says there is delocalisation in both methanoic acid and methanoate ion but it wil ...